CANADA BRITISH COLUMBIA WATER QUALITY MONITORING AGREEMENT
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1 CANADA BRITISH COLUMBIA WATER QUALITY MONITORING AGREEMENT WATER QUALITY ASSESSMENT OF Salmon River AT SALMON ARM ( ) Prepared by: L. G. Swain, P. Eng. B.C. Ministry of Environment Prepared for: B.C. Ministry of Environment and Environment Canada March 27 Environment Environnement Canada Canada
2 Water Quality Assessment of the Salmon River at Salmon Arm EXECUTIVE SUMMARY The Salmon River at Salmon Arm is located in the southern-interior portion of the province. Its headwaters originate about 15 km northeast from Salmon Lake. Some of the river's flow is diverted into Salmon Lake; much of that flow returns to the river via McInnis Creek, the outlet from Salmon Lake. From the confluence with McInnis Creek, the Salmon River flows northeast to Falkland, then southeast and east to Glenemma, and finally north to Salmon Arm before entering Shuswap Lake. The total length and drainage area of the Salmon River are approximately 12 km and 151 km 2, respectively. The Salmon River is an important tributary of Shuswap Lake, which drains into the South Thompson River. In addition to supporting anadromous salmonids, resident fish species and other aquatic organisms, the Salmon River and its tributaries provide important sources of raw water for domestic water supplies, irrigation, and livestock watering. Recreation and aesthetics also represent important uses of the aquatic environment, both of which generate social and economic benefits to area residents. Concerns related to environmental quality conditions in the Salmon River are primarily associated with non-point source contaminant discharges. Such contaminants arise from a variety of land use activities, including forest management, agriculture and urban development. Contaminants of concern in the watershed include suspended solids, turbidity, ammonia, phosphorus, nitrogen, metals and fecal coliforms. In addition, water withdrawals from the river and nearby infiltration galleries have resulted in decreased stream flows and associated effects on water temperatures and other habitat features in the river. CONCLUSIONS Flows fluctuate throughout the year, but peak in the May-June period on a yearly basis. Low flows seem to be consistent through most of the other months of the year. Canada British Columbia Water Quality Monitoring Agreement i
3 Water Quality Assessment of the Salmon River at Salmon Arm Water temperatures and dissolved oxygen often exceed water quality objectives, especially during the hot summer periods. Several metals exceeded guidelines or water quality objectives on occasion; however, these seemed to be correlated with turbidity and were likely in particulate form and not biologically available. Such metals included: aluminum, cobalt, chromium, copper, iron, lead, silver, and zinc. Cadmium also often exceeded guidelines, and was not always related to turbidity, which means that it could potentially be more available to aquatic life. This has just become evident over the past couple of years since the cadmium detection limit has decreased; cadmium will continue to be monitored at these low levels to track this potential concern. Colour values and fecal coliforms and E. Coli often exceeded guidelines for drinking water at the source; however, these were related to turbidity events and complete treatment of the source water would be needed prior to use for drinking. Arsenic values may be showing a slight increase in concentration through the period of record. This may be due to a larger groundwater contribution to the flow. Lithium and extractable silicon were showing distinct decreases in concentrations over time. RECOMMENDATIONS We recommend monitoring be continued for the Salmon River at Salmon Arm to track the possible increases in variables, and guideline exceedences that have been identified in this report. Either trivalent and hexavalent forms of chromium should be measured in the future, or alternately, guidelines be developed for total chromium values. A statistical analysis of the data for arsenic, lithium, and silicon should be conducted to confirm whether the identified trends are real. Canada British Columbia Water Quality Monitoring Agreement ii
4 Water Quality Assessment of the Salmon River at Salmon Arm Water quality indicators that are important for future monitoring are: flow, water temperature, specific conductivity, ph, turbidity, hardness, and dissolved oxygen, appropriate forms of metals for comparison to their respective guidelines, and other variables related to drinking water such as colour, fecal coliforms and E. Coli. Canada British Columbia Water Quality Monitoring Agreement iii
5 Water Quality Assessment of the Salmon River at Salmon Arm ACKNOWLEDGEMENTS The graphs in this report were prepared by Sacha Wassick of Environment Canada. The draft report was reviewed by Andrea Ryan from Environment Canada. We thank these individuals for their contributions to improving this document. Any errors or omissions are the responsibility of the author. Canada British Columbia Water Quality Monitoring Agreement iv
6 Water Quality Assessment of the Salmon River at Salmon Arm TABLE OF CONTENTS Page Executive Summary... i Conclusions...i Recommendations... ii Acknowledgements... iv Table of Contents... v List of Figures...v Introduction... 1 Water Quality Assessment... 3 References... 9 LIST OF FIGURES Page Figure 1. Salmon River near the Mouth... 2 Figure 2. Water Survey of Canada Flow Data for Salmon River near the mouth... 3 Figure 3. Total Aluminum... 1 Figure 4. Phenolphthalein Aluminum Figure 5. Total Alkalinity Figure 6. Ammonia Figure 7. Total Antimony Figure 8. Total Arsenic versus Turbidity Figure 9. Total Arsenic versus Conductivity Figure 1. Total Boron Figure 11. Total Barium Figure 12. Total Beryllium Figure 13. Total Bismuth... 2 Figure 14. Dissolved Bromide Canada British Columbia Water Quality Monitoring Agreement v
7 Water Quality Assessment of the Salmon River at Salmon Arm LIST OF FIGURES (CONTINUED) Page Figure 15. Dissolved Inorganic Carbon Figure 16. Dissolved Organic Carbon Figure 17 Dissolved and Extractable Calcium Figure 18. Total Cadmium Figure 19. Total Cadmium (23 to 25) Figure 2. Dissolved Chloride Figure 21. Total and Weak Acid Dissociable Cyanide Figure 22. Total Cobalt Figure 23. Apparent Colour... 3 Figure 24. True Colour Figure 25. Total Chromium Figure 26. Total Copper Figure 27. Total Copper ( ) Figure 28. E. Coli Figure 29. Total and Dissolved Fluoride Figure 3. Total Iron Figure 31. Fecal Coliforms Figure 32. Total Gallium Figure 33. Hardness... 4 Figure 34. Dissolved and Extractable Potassium Figure 35. Total Lanthanum Figure 36. Total Lead Figure 37. Total Lithium Figure 38. Total Mercury Figure 39. Dissolved and Extractable Magnesium Figure 4. Total Manganese Figure 41. Total Molybdenum Canada British Columbia Water Quality Monitoring Agreement vi
8 Water Quality Assessment of the Salmon River at Salmon Arm LIST OF FIGURES (CONTINUED) Page Figure 42. Dissolved Nitrate Figure 43. Dissolved Nitrate/Nitrite... 5 Figure 44. Dissolved Nitrite Figure 45. Total Dissolved Nitrogen Figure 46. Total Nitrogen Figure 47. Total Nickel Figure 48. Dissolved Oxygen Figure 49. Total Dissolved Phosphorus Figure 5. Total and Dissolved Phosphorus Figure 51. ph Figure 52. Total Rubudium Figure 53. Fixed Filterable Residue... 6 Figure 54. Fixed Non-Filterable Residue Figure 55. Non-Filterable Residue Figure 56. Total Selenium Figure 57. Extractable Silicon Figure 58. Dissolved and Reactive Silica Figure 59. Total Silver Figure 6. Total Silver (23-25) Figure 61. Dissolved and Extractable Sodium Figure 62. Specific Conductance Figure 63 Total Strontium... 7 Figure 64. Dissolved Sulphate Figure 65. Temperature, Air and Water Figure 66. Total Tin Canada British Columbia Water Quality Monitoring Agreement vii
9 Water Quality Assessment of the Salmon River at Salmon Arm LIST OF FIGURES (CONTINUED) Page Figure 67. Total Thallium Figure 68. Turbidity Figure 69. Total Uranium Figure 7. Total Vanadium Figure 71. Total Zinc Figure 72. Total Zinc versus Turbidity Canada British Columbia Water Quality Monitoring Agreement viii
10 Water Quality Assessment of the Salmon River at Salmon Arm Introduction The Salmon River, near Salmon Arm B.C., is located in the southern-interior portion of the province (Figure 1). Its headwaters originate in the vicinity of Tahaetkun and Bouleau Mountains, south of Westwold and northeast of Merritt. The river's headwaters are located in Monte Hills Provincial Forest, some 15 km northeast from Salmon Lake. Some of the river's flow is diverted into Salmon Lake; much of that flow returns to the river via McInnis Creek, the outlet from Salmon Lake. From the confluence with McInnis Creek, the Salmon River flows northeast to Falkland, then southeast and east to Glenemma, and finally north to Salmon Arm before entering Shuswap Lake. The total length and drainage area of the Salmon River are approximately 12 km and 151 km 2, respectively. The Salmon River is an important tributary of Shuswap Lake, which drains into the South Thompson River. In addition to supporting anadromous salmonids, resident fish species and other aquatic organisms, the Salmon River and its tributaries provide important sources of raw water for domestic water supplies, irrigation, and livestock watering. Recreation and aesthetics also represent important uses of the aquatic environment, both of which generate social and economic benefits to area residents. Concerns related to environmental quality conditions in the Salmon River are primarily associated with non-point source contaminant discharges. Such contaminants arise from a variety of land use activities, including forest management, agriculture and urban development. Contaminants of concern in the watershed include suspended solids, turbidity, ammonia, phosphorus, nitrogen, metals and fecal coliforms. In addition, water withdrawals from the river and nearby infiltration galleries have resulted in decreased stream flows and associated effects on water temperatures and other habitat features in the river. Canada British Columbia Water Quality Monitoring Agreement 1
11 Water Quality Assessment of the Salmon River at Salmon Arm FIGURE 1: Salmon River at Salmon Arm This report discusses water quality data collected by the provincial and federal governments between 1985 and 24 from a station on Salmon River near its mouth at Salmon Arm. Data for the Salmon River at Salmon Arm have been collected on a frequency of about once every two weeks. As well, twice per year, two additional samples are collected in order to ensure that there are two periods when weekly samples are collected during five consecutive weeks. In addition, quality assurance samples (blanks and replicates) are collected six times per year. Canada British Columbia Water Quality Monitoring Agreement 2
12 Water Quality Assessment of the Salmon River at Salmon Arm The federal data are stored under ENVIRODAT station number BC8LE4 and the BC Environment station E2692. The water quality variables are plotted in Figures 3 to 79. Water Survey of Canada operates a flow gauge at the same site (site number BC8LE21). Flow data from 1911 to 24 are graphed in Figure 2. FIGURE 2: Water Survey of Canada Flow Data for Salmon River near Salmon Arm WATER QUALITY ASSESSMENT The state of the water quality was assessed by comparing the values to B.C.'s approved and working guidelines for water quality (B.C. Ministry of Environment, Lands and Parks, 21), and by looking for any obvious trends in the data. Any levels or apparent trends that were found to be deleterious or potentially deleterious to sensitive water uses, including drinking water, aquatic life, wildlife, recreation, irrigation, and livestock watering were noted in the following variable-by-variable discussion. Canada British Columbia Water Quality Monitoring Agreement 3
13 Water Quality Assessment of the Salmon River at Salmon Arm The following water quality indicators are not discussed as they met all water quality guidelines and showed no clearly visible trends: phenolphthalein alkalinity, ammonia, barium, bromide, nitrite, total nitrogen, fixed non-filterable residue, fixed filterable residue, non-filterable residue, extractable silicon, and tin. The following water quality indicators seemed to fluctuate through the year according to turbidity concentrations, but were below guideline values and had no other trends: antimony, beryllium, bismuth, dissolved organic carbon, gallium, lanthanum, manganese, nickel, total phosphorus, rubidium, thallium, and vanadium. Other water quality indicators seemed to fluctuate through the year according to the specific conductivity of the water. For dissolved forms of many of these indicators, they would be a part of the measured conductivity, and this is to be expected. These types of indicators that were not measured above guideline values included: alkalinity, ammonia, boron, dissolved inorganic carbon, calcium, chloride, potassium, magnesium, molybdenum, nitrate, total dissolved nitrogen, ph, sodium, hardness, strontium, sulphate, and uranium. Flows (Figure 2): fluctuate throughout the year, but peak in the May-June period on a yearly basis. Mean flows throughout the year are about 2 m 3 /s; although mean peak flows are about 2 m 3 /s. Absolute peak flows have been as high as 6 m 3 /s. Aluminum (Figure 3): values exceed the drinking water guideline; however, values have fluctuated with turbidity, are likely in particulate form, and not biologically available. There does not appear to be any trend in values during the period of record. Arsenic (Figure 8): values have been below guidelines but seem to be increasing in value during the period of record. When we used a linear regression, we found that there was a weak correlation of values increasing through time (R 2 =.5). Total arsenic values also seem to increase with turbidity, meaning that higher values are likely in particulate form and not biologically available. Canada British Columbia Water Quality Monitoring Agreement 4
14 Water Quality Assessment of the Salmon River at Salmon Arm Cadmium (Figures 18 and 19): values seemed to fluctuate with turbidity, which means that higher values would be associated with particulate matter and would likely not be biologically available. Although values seem to be getting lower through the period of record, this is likely more a phenomenon related to decreasing detection limits and improved analytical capabilities through time, rather than a real decrease in concentration. Lower cadmium values, and their detection limits, during the period also coincided with lower turbidity concentrations. Additional data need to be collected to determine whether turbidity and cadmium are in fact beginning to decline. Cyanide (Figure 21): values generally were well below the maximum and 3-day average guidelines for weak-acid dissociable cyanide. One exception was a total cyanide value in October 24. Since data for only one year have been collected, additional sampling is required before any trends might become evident. Cobalt (Figure 22): values seemed to be correlated with turbidity, which means that higher cobalt values are associated with particulate matter and not likely biologically available. The occasional individual value has exceeded the BC guideline of 4 µg/l for the 3-day mean concentration; however, all individual values were well below the guideline for maximum concentrations of 11 µg/l. Lower cobalt values in coincided with lower turbidity concentrations. Additional data need to be collected to determine whether turbidity and cobalt are in fact beginning to decline. Colour: apparent colour (Figure 23) values from 1988 until 1998 seemed to fluctuate with turbidity and regularly exceeded the drinking water guideline of 15 TCU for true colour; however, this is to be expected since true colour is measured on a filtered sample (i.e., turbidity removed). True colour values (Figure 24) began to be measured in 1997 and were lower than apparent colour values, as expected; however, values seem to fluctuate with turbidity and regularly exceeded the drinking water guideline. Chromium (Figure 25): values in the 199 s exceeded the guideline for trivalent chromium and hexavalent chromium; however, since the year 2, only the guideline for hexavalent chromium has been exceeded. Values seem to fluctuate with turbidity Canada British Columbia Water Quality Monitoring Agreement 5
15 Water Quality Assessment of the Salmon River at Salmon Arm values, meaning that the higher chromium values are likely in particulate form and not biologically available. There is a very weak trend identified using a linear regression (R 2 =.17) of decreasing concentrations through time; however, this is likely related to lower turbidity concentrations in the post-2 period. We recommend that either trivalent and hexavalent forms of chromium be measured in the future or guidelines be developed for total chromium values. Copper (Figures 26 and 27): values generally met the guidelines (hardness-dependent) for maximum and 3-day mean concentrations; however, when these were exceeded, turbidity values were also high. This mean that the higher copper values are in particulate form and not likely biologically available. Higher values in the late 198 s were quite high due to widespread contamination because of the failure of preservative vial cap liners between 1986 and E. Coli (Figure 28) and Fecal Coliforms (Figure 31): regularly exceeded the water quality guideline and short and long-term water quality objectives, respectively, for drinking water sources. High fecal coliforms seem to be correlated with high turbidity concentrations. Drinking water taken form the Salmon River would require complete treatment. Fluoride (Figure 29): values were measured only between 1988 and Values generally met the aquatic life guideline of.3 µg/l. High fluoride values coincided with periods of high specific conductivity and low river flows, suggesting that the fluoride was a result of groundwater contributions to the base flow of the river. Iron (Figure 3): values regularly exceeded the guideline for the protection of aquatic life and drinking water supplies (aesthetics) of 3 µg/l. High iron values were correlated with high turbidity concentrations, meaning that the iron was in particulate form and not biologically available. It would also be removed in water treatment processes for drinking water supplies. Peak iron values since 2 seem to be lower than during the previous decade; however, these lower values are likely the result of lower turbidity values during that period. Canada British Columbia Water Quality Monitoring Agreement 6
16 Water Quality Assessment of the Salmon River at Salmon Arm Hardness (Figure 33): values were strongly correlated with specific conductivity and low river flows, suggesting that the hardness was a result of groundwater contributions to the base flow of the river. Values throughout the year were generally higher than the 1 mg/l level for drinking water supplies. Lead (Figure 36): values seem to correlate with turbidity, meaning that high lead values are in particulate form and not likely biologically available. Values were generally below all guidelines for aquatic life and drinking water supplies, with only two individual values exceeding the lowest BC 3-day mean guideline of 4.5 µg/l. Analytical detection limits for lead were reduced in 23 from the.2 µg/l level, which means that in future years, trends to lower values might be suspected; however, the lower detection limits may be responsible for such observations. Lithium (Figure 37): values have shown a strong decline during the period of record (R 2 =.31) but have always been below the BC guideline to protect aquatic life of 67 µg/l. Values also seem to be correlated with high specific conductivity and low flows, meaning that the lower values are likely associated with a groundwater contribution to base river flow. Dissolved Oxygen (Figure 48): values seem to fluctuate with conductivity, which is not surprising in that conductivity peaks occur when there are low flows in the colder months of the year, and under normal situations, dissolved oxygen concentrations rise at colder temperatures. Only one value was slightly below the 8 mg/l water quality objective. Selenium (Figure 56): values on occasion exceeded the guideline to protect aquatic life of 1 µg/l. Selenium values seemed to be correlated with specific conductivity with highest values occurring during low flow conditions. Silica and Silicon (Figure 58): Values for extractable silicon have decreased considerably over the period from 1999 until 22, with a linear regression having a R 2 value of.23. Canada British Columbia Water Quality Monitoring Agreement 7
17 Water Quality Assessment of the Salmon River at Salmon Arm Silver (Figures 59 and 6): values on occasion exceeded the BC aquatic life guideline of.1 µg/l, but this usually happened when detection limits were at that level. The detection limit for silver was reduced to.1 µg/l in early 23, and no values have exceeded the guideline since that time. Data from that latter period seem to fluctuate with turbidity concentrations, meaning that the higher silver values are related to particulate and not likely biologically available. Water Temperature (Figure 65): varies with flow and the time of year. Temperatures have exceeded objective levels especially during the hot summer periods. Zinc (Figures 71 and 72): values fluctuate with turbidity, which means that high values are associated with particulate matter and not likely biologically available. Occasional values exceed aquatic life guidelines that are hardness-dependent. Canada British Columbia Water Quality Monitoring Agreement 8
18 Water Quality Assessment of the Salmon River at Salmon Arm REFERENCES BC Ministry of Water, Lands and Air Protection. 21. A Compendium of Working Water Quality Guidelines for British Columbia. N. K. Nagpal, L. W. Pommen, and. L. G. Swain. Victoria, B.C. BC Ministry of Water, Lands and Air Protection. 21. British Columbia Approved Water Quality Guidelines (Criteria) 1998 Edition. Updated: August 24, Canada British Columbia Water Quality Monitoring Agreement 9
19 Water Quality Assessment of the Salmon River at Salmon Arm Aluminum Total (ug/l) Figure 3 Al Total CCME Al AW/DW Guideline Max-1 ug/l ph>6.5, Ca>4mg/L, DOC>2mg/L Turbidity (NTU) 1 CCME Al AW Guideline Max-5 ug/l ph<6.5, Ca<4mg/L, DOC<2mg/L Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 1
20 Water Quality Assessment of the Salmon River at Salmon Arm Alkalinity Phenolphthalein CACO3 (mg/l) Figure 4 Alkalinity Phenolphthalein Jan-88 Apr-88 Jul-88 Oct-88 Jan-89 Apr-89 Jul-89 Oct-89 Jan-9 Canada British Columbia Water Quality Monitoring Agreement 11
21 Water Quality Assessment of the Salmon River at Salmon Arm Alkalinity Total CaCO3 (mg/l) Figure 5 Alkalinity Total BC MAX Alk Guideline 25 Conductivity Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Canada British Columbia Water Quality Monitoring Agreement 12
22 Water Quality Assessment of the Salmon River at Salmon Arm Ammonia Dissolved (mg/l) Figure 6 Ammonia Dissolved Conductivity Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 13
23 Water Quality Assessment of the Salmon River at Salmon Arm Total Antimony (ug/l) Figure 7 Sb Total Turbidity Jan-3 Apr-3 Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 14
24 Water Quality Assessment of the Salmon River at Salmon Arm Arsenic Total (ug/l) Figure 8 Arsenic Total Turbidity (NTU) 4 CCME/BC Max DW guideline-25 ug/l CCME/BC Max DW guideline-5 ug/l Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 15
25 Water Quality Assessment of the Salmon River at Salmon Arm Arsenic Total (ug/l) Figure 9 Arsenic Total Conductivity 4 CCME/BC Max DW guideline-25 ug/l CCME/BC Max DW guideline-5 ug/l Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 16
26 Water Quality Assessment of the Salmon River at Salmon Arm Boron Total (ug/l) Figure 1 Boron Total Conductivity (us/cm) Jan-3 Apr-3 Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 17
27 Water Quality Assessment of the Salmon River at Salmon Arm Barium Total (ug/l) Figure 11 Barium Total 12 Max BC/CCME/BC 3 Day Guideline DW - 1 ug/l Mac BC Guideline AW - 5 ug/l Conductivity (us/cm) Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 18
28 Water Quality Assessment of the Salmon River at Salmon Arm Beryllium Total (ug/l) Figure 12 BC Max AW Guideline ug/l CCME DW Guideline - 4 ug/l Beryllium Total Turbidity (NTU) Jan-9 Jan-93 Jan-96 Jan-99 Jan-2 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 19
29 Water Quality Assessment of the Salmon River at Salmon Arm BismuthTotal (ug/l) Figure 13 Bismuth Total Turbidity (NTU) Jan-3 Apr-3 Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 2
30 Water Quality Assessment of the Salmon River at Salmon Arm Bromide Dissolved (ug/l) Figure 14 Bromide Dissolved Turbidity (NTU) Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Canada British Columbia Water Quality Monitoring Agreement 21
31 Water Quality Assessment of the Salmon River at Salmon Arm Carbon Dissolved Inorganic (mg/l) Figure 15 Inorganic Conductivity Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Canada British Columbia Water Quality Monitoring Agreement 22
32 Water Quality Assessment of the Salmon River at Salmon Arm Carbon Dissolved Organic (mg/l) Figure 16 Organic Turbidity Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 23
33 Water Quality Assessment of the Salmon River at Salmon Arm Calcium Dissolved and Extractable (mg/l) Figure 17 Calcium Dissolved Calcium Extractable BC Max Guideline 8 Conductivity (us/cm) (background) Jan-88 Jan-9 Jan-92 Jan-96 Jan-98 Jan- Jan-2 Jan-4 Canada British Columbia Water Quality Monitoring Agreement 24
34 Water Quality Assessment of the Salmon River at Salmon Arm Cadmium Total (ug/l) Figure 18 Cadmium Total Turbidity (NTU) CCME Cd AW Guideline CCME/BC Max DW guideline - 5 ug/l Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 25
35 Water Quality Assessment of the Salmon River at Salmon Arm Cadmium Total (ug/l) Figure 19 Cadmium Total Turbidity (NTU) CCME Cd AW Guideline CCME/BC Max DW guideline - 5 ug/l Jan-3 Apr-3 Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 26
36 Water Quality Assessment of the Salmon River at Salmon Arm Chloride Dissolved (mg/l) Figure 2 Chloride Dissolved Conductivity (us/cm) 8 BC Max Cl AW Guideline - 6 mg/l BC Max Cl DW Guideline - 25 mg/l BC 3 Day AW Guideline - 15 mg/l Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Canada British Columbia Water Quality Monitoring Agreement 27
37 Water Quality Assessment of the Salmon River at Salmon Arm Salmon River at Hwy1 Bridge Cyanide Total and Weak Acid Dissociable (ug/l) Figure BC CN Tot DW Guideline Max-2 ug/l Two CN WAD data points not shown 11/23/ ug/l 12/6/ ug/l CN Total CN Weak Acid 3-Day-BC WAD AW Guideline BC Max WAD AW Guideline Turbidity (NTU) Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 28
38 Water Quality Assessment of the Salmon River at Salmon Arm Cobalt Total (ug/l) Figure 22 Cobalt Total 3-Day-BC AW Guideline Turbidity (NTU) 8 BC Max Co AW Guideline - 11 ug/l Jan-9 Jan-93 Jan-96 Jan-99 Jan-2 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 29
39 Water Quality Assessment of the Salmon River at Salmon Arm Colour Apparent (Colour Units) Figure 23 Colour Apparent BC Max DW Guideline Turbidity (NTU) Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Canada British Columbia Water Quality Monitoring Agreement 3
40 Water Quality Assessment of the Salmon River at Salmon Arm Colour True (Colour Units) Figure 24 Colour True BC Max DW Guideline Turbidity (NTU) (background) Jan-97 Jul-97 Jan-98 Jul-98 Jan-99 Jul-99 Jan- Jul- Jan-1 Jul-1 Jan-2 Jul-2 Jan-3 Jul-3 Jan-4 Jul-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 31
41 Water Quality Assessment of the Salmon River at Salmon Arm Chromium Total (ug/l) Figure 25 BC Max Cr DW Guideline - 5 ug/l Chromium Total BC Max Cr3 AW Guideline BC/CCME Max Cr6 AW Guideline CCME Max Cr3 AW Guideline Turbidity (NTU) Jan-9 Jan-92 Jan-96 Jan-98 Jan- Jan-2 Jan-4 Canada British Columbia Water Quality Monitoring Agreement 32
42 Water Quality Assessment of the Salmon River at Salmon Arm Copper Total (ug/l) Figure 26 BC Max DW Guideline - 5 ug/l Copper Total Turbidity (NTU) BC Max guideline AW BC 3-day AW guideline CCME Cu AW Guideline Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 33
43 Water Quality Assessment of the Salmon River at Salmon Arm Copper Total (ug/l) Figure 27 BC Max DW Guideline - 5 ug/l CCME AW Guideline range ug/l Copper Total BC Max guideline AW BC 3-day AW guideline Turbidity (NTU) Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 34
44 Water Quality Assessment of the Salmon River at Salmon Arm Salmon River near Hwy1 E Coli (CFU/1mL) Figure 28 E Coli BC Max DW Guideline - 1 CFU Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 35
45 Water Quality Assessment of the Salmon River at Salmon Arm Fluoride Dissolved and Total (mg/l) Figure 29 Fluoride Dissolved Fluoride Total BC Max AW Guideline Range Conductivity (us/cm).6 BC 3 Day DW Guideline - 1 mg/l BC/CCME DW Guideline mg/l Jan-88 Jan-9 Jan-92 Jan-96 Jan-98 Canada British Columbia Water Quality Monitoring Agreement 36
46 Water Quality Assessment of the Salmon River at Salmon Arm Iron Total (ug/l) Figure 3 Iron Total BC/CCME Max AW/DW Guideline Turbidity (NTU) Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 37
47 Water Quality Assessment of the Salmon River at Salmon Arm Fecal Coliforms (CFU/1mL) Figure 31 Fecal Coliforms Maximum DW Objective long-term Maximum DW Objective short-term Turbidity (NTU) Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 38
48 Water Quality Assessment of the Salmon River at Salmon Arm Total Gallium (ug/l) Figure 32 Ga Total Turbidity Jan-3 Apr-3 Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 39
49 Water Quality Assessment of the Salmon River at Salmon Arm Hardness Total Calcd (CaCO3) Figure 33 Hardness Total Calc. CCME Max DW Guideline Upper Limit CCME Max DW Guideline Lower Limit Conductivity (us/cm) Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 4
50 Water Quality Assessment of the Salmon River at Salmon Arm Potassium Dissolved and Extractable (mg/l) Figure 34 K Dissolved K Extractable Specific Conductivity (us/cm) Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Canada British Columbia Water Quality Monitoring Agreement 41
51 Water Quality Assessment of the Salmon River at Salmon Arm Lanthanum Total (ug/l) Figure 35 Lanthanum Total Turbidity Jan-3 Apr-3 Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 42
52 Water Quality Assessment of the Salmon River at Salmon Arm Lead Total (ug/l) Figure 36 Lead Total Pb DW CCME Guideline Turbidity (NTU) 1 8 BC Max DW Guideline 5 ug/l BC Max AW Guideline Range ug/l CCME Max AW Guideline range ug/l BC 3 Day AW Guideline range ug/l Jan-88 Jan-9 Jan-92 Jan-96 Jan-98 Jan- Jan-2 Jan-4 Canada British Columbia Water Quality Monitoring Agreement 43
53 Water Quality Assessment of the Salmon River at Salmon Arm Lithium Total (ug/l) Figure 37 Lithium Total Conductivity (us/cm) 12 BC Max Li AW Guideline - 67 ug/l Jan-9 Jan-93 Jan-96 Jan-99 Jan-2 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 44
54 Water Quality Assessment of the Salmon River at Salmon Arm Mercury Total (ug/l) Figure 38 Mercury Tot al Conductivity (us/cm) Outlier Removed at: 3/1/199 9: ug/l Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Canada British Columbia Water Quality Monitoring Agreement 45
55 Water Quality Assessment of the Salmon River at Salmon Arm Magnesium Dissolved and Extractable (mg/l) Figure 39 Mg Dissolved Mg Extractable Conductivity (us/cm) 25 BC Max DW Guideline - 1 mg/l Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 46
56 Water Quality Assessment of the Salmon River at Salmon Arm Manganese Total (ug/l) Figure 4 Manganese Total Turbidity (NTU) 5 BC Max AW Mn Guideline range ug/l BC 3 Day Aw Mn Guideline range ug/l Jan-88 Jan-9 Jan-92 Jan-96 Jan-98 Jan- Jan-2 Jan-4 Canada British Columbia Water Quality Monitoring Agreement 47
57 Water Quality Assessment of the Salmon River at Salmon Arm Molybdenum Total (ug/l) Figure 41 BC Max DW Guideline 25 ug/l BC Max AW Guideline 2 ug/l 3-Day-BC AW Guideline 1 ug/l CCME Max AW Guideline 73 ug/l Molybdenum Total Conductivity Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 48
58 Water Quality Assessment of the Salmon River at Salmon Arm Nitrogen Dissolved Nitrate (mg/l) Figure 42 Nitrogen Dissolved Nitrate Conductivity (us/cm).5.4 BC Max NO2 and NO3 DW Guideline 1 mg/l BC Max NO3 AW Guideline 2 mg/l BC Max NO 3 DW Guideline 1 mg/l 3-Day-BC NO3 AW Guideline 4 mg/l CCME Max NO3 DW Guideline 45 mg/l CCME Max NO3 AW Guideline 13 mg/l Jul-94 Jan-95 Jul-95 Jan-96 Jul-96 Jan-97 Jul-97 Jan-98 Jul-98 Jan-99 Canada British Columbia Water Quality Monitoring Agreement 49
59 Water Quality Assessment of the Salmon River at Salmon Arm Nitrogen Dissolved NO3 and NO2 (mg/l) Figure BC Max NO2 DW Guideline 1 mg/l BC Max NO3 AW Guideline 2 mg/l BC Max NO 3 DW Guideline 1 mg/l 3-Day-BC NO3 AW Guideline 4 mg/l CCME Max NO3 DW Guideline 45 mg/l CCME Max NO3 AW Guideline 13 mg/l Nitrogen Dissolved NO3 and NO2 CCME Max NO2 AW Guideline Conductivity (us/cm) Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Canada British Columbia Water Quality Monitoring Agreement 5
60 Water Quality Assessment of the Salmon River at Salmon Arm Nitrogen Nitrite (mg/l) Figure 44 Nitrogen Nitrite Conductivity (us/cm).5 BC Max NO2 and NO3 DW Guideline 1 mg/l CCME Max NO2 AW Guideline.6 mg/l Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Canada British Columbia Water Quality Monitoring Agreement 51
61 Water Quality Assessment of the Salmon River at Salmon Arm Nitrogen Total Dissolved (mg/l) Figure 45 Nitrogen Total Dissolved Conductivity (us/cm) Jan-88 Jan-9 Jan-92 Jan-96 Jan-98 Jan- Jan-2 Jan-4 Canada British Columbia Water Quality Monitoring Agreement 52
62 Water Quality Assessment of the Salmon River at Salmon Arm Salmon RIver at Hwy 1 Bridge Nitrogen Total (mg/l) Figure 46 Nitrogen Total Conductivity (us/cm) Feb-94 Mar-94 Apr-94 Canada British Columbia Water Quality Monitoring Agreement 53
63 Water Quality Assessment of the Salmon River at Salmon Arm Nickel Total (ug/l) Figure 47 BC/CCME AW Ni Guideline Range ug/l Nickel Total Turbidity (NTU) Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 54
64 Water Quality Assessment of the Salmon River at Salmon Arm Oxygen Dissolved (mg/l) Figure Oxygen Dissolved BC Max Long-term minimum BC Max O2 Min Guideline The minimum level of O2 that should be maintained for all fish life stages/ BC Max Short-term Minimum 3-Day-BC O2 AW Guideline The minimum level of O2 that should be maintained for all fish life stages/ 3-Day-BC Objective - Greater than or equal to 8 mg/l Short-term BC-3-Day Objective - Greater than or equal to 11mg/L Long-term Conductivity Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 55
65 Water Quality Assessment of the Salmon River at Salmon Arm Phosphorus Total Dissolved (mg/l) Figure 49 P Total Dissolved Turbidity (NTU).16 BC Max P Total DW Guideline - 1 ug/l Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 56
66 Water Quality Assessment of the Salmon River at Salmon Arm Total Phosphorus (mg/l) Figure 5 Total Phosphorus Turbidity (NTU).8 BC Max P Total DW Guideline - 1 ug/l Jan-88 Jan-9 Jan-92 Jan-96 Jan-98 Jan- Jan-2 Jan-4 Canada British Columbia Water Quality Monitoring Agreement 57
67 Water Quality Assessment of the Salmon River at Salmon Arm ph (relative units) Figure 51 ph CCME/BC Max/BC 3 Day Objective ph AW/DW/AO Guideline Minimum CCME ph AW/DW High Guideline BC Max/3 Day BC ph AW/DW/AO Guideline maximum Specific Conductivity (us/cm) Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Canada British Columbia Water Quality Monitoring Agreement 58
68 Water Quality Assessment of the Salmon River at Salmon Arm Rubidium Total (ug/l) Figure 52 Rb Total Turbidity Jan-3 Apr-3 Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 59
69 Water Quality Assessment of the Salmon River at Salmon Arm Residue Fixed Filterable (mg/l) Figure 53 Residue Fixed Filterable Conductivity Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Canada British Columbia Water Quality Monitoring Agreement 6
70 Water Quality Assessment of the Salmon River at Salmon Arm Residue Fixed Non-Filterable (mg/l) Figure 54 Residue Fixed Non-Filterable Conductivity Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Canada British Columbia Water Quality Monitoring Agreement 61
71 Water Quality Assessment of the Salmon River at Salmon Arm Residue Non-Filterable (mg/l) Figure 55 Residue Fixed Non-Filterable Conductivity Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Canada British Columbia Water Quality Monitoring Agreement 62
72 Water Quality Assessment of the Salmon River at Salmon Arm Selenium Total (ug/l) Figure 56 BC/CCME Max Se DW Guideline - 1ug/L Se Total Se Extractable CCME Se AW Guideline BC Max/3-Day-BC AW Guideline Conductivity Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 63
73 Water Quality Assessment of the Salmon River at Salmon Arm Silicon Extractable (mg/l) Figure 57 Silicon Extractable Conductivity Oct-99 Jan- Apr- Jul- Oct- Jan-1 Apr-1 Jul-1 Oct-1 Jan-2 Apr-2 Canada British Columbia Water Quality Monitoring Agreement 64
74 Water Quality Assessment of the Salmon River at Salmon Arm Silica Dissolved and Reactive (mg/l) Figure 58 Silica Dissolved Silica Reactive Conductivity (us/cm) Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Canada British Columbia Water Quality Monitoring Agreement 65
75 Water Quality Assessment of the Salmon River at Salmon Arm Silver Total (ug/l) Figure 59 Silver Total CCME Max AW Guideline Turbidity (NTU) Data point not shown on 7/1/9-1ug/L Outlier Removed at: 3/4/ : ug/l 3 BC Max AW Guideline range.1-3 ug/l 3 Day AW Guideline range ug/l Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 66
76 Water Quality Assessment of the Salmon River at Salmon Arm Silver Total (ug/l) Figure 6 Silver Total CCME Max AW Guideline Turbidity (NTU).2 BC Max AW Guideline range.1-3 ug/l 3 Day AW Guideline range ug/l Jan-3 Apr-3 Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 67
77 Water Quality Assessment of the Salmon River at Salmon Arm Sodium Dissolved and Extractable (mg/l) Figure 61 Sodium Extractable Sodium Dissolved Conductivity (us/cm) Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Canada British Columbia Water Quality Monitoring Agreement 68
78 Water Quality Assessment of the Salmon River at Salmon Arm Specific Conductance (us/cm) Figure 62 Specific Conductance Hardness Jan-88 Jan-9 Jan-92 Jan-96 Jan-98 Jan- Jan-2 Jan-4 Canada British Columbia Water Quality Monitoring Agreement 69
79 Water Quality Assessment of the Salmon River at Salmon Arm Strontium Total (ug/l) Figure 63 Strontium Total Conductivity (us/cm) Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 7
80 Water Quality Assessment of the Salmon River at Salmon Arm Sulphate Dissolved (mg/l) Figure 64 Sulphate Dissolved Conductivity (us/cm) 8 BC Max DW Sulphate Guideline - 5 mg/l BC Max AW Sulphate Guideline - 1 mg/l Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Canada British Columbia Water Quality Monitoring Agreement 71
81 Water Quality Assessment of the Salmon River at Salmon Arm Temperature Air and Water (deg C) Figure 65 Air Temperature Water Temperature Max Objective (Dec. 1 to Sept. 1) Max Objective (Oct. 1 to Nov. 3) 3-Day Objective less than or equal to 14.2 all year Jan-88 Jan-9 Jan-92 Jan-96 Jan-98 Jan- Jan-2 Jan-4 Canada British Columbia Water Quality Monitoring Agreement 72
82 Water Quality Assessment of the Salmon River at Salmon Arm Tin Total (ug/l) Figure 66 Tin Total Turbidity (NTU) Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 73
83 Water Quality Assessment of the Salmon River at Salmon Arm Thallium Total (ug/l) Figure 67 Tl Total Turbidity.3 Data point not shown at 9/15/ ug/l Jan-3 Apr-3 Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 74
84 Water Quality Assessment of the Salmon River at Salmon Arm Turbidity (us/cm) Figure 68 Turbidity CCME Max Turbidity DW Guideline Jan-88 Jan-91 Jan-97 Jan- Jan-3 Canada British Columbia Water Quality Monitoring Agreement 75
85 Water Quality Assessment of the Salmon River at Salmon Arm Uranium Total (ug/l) Figure 69 Uranium Total Conductivity (us/cm) Jan-3 Apr-3 Jul-3 Oct-3 Jan-4 Apr-4 Jul-4 Oct-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 76
86 Water Quality Assessment of the Salmon River at Salmon Arm Vanadium Total (ug/l) Figure 7 Vanadium Total Turbidity (NTU) Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 77
87 Water Quality Assessment of the Salmon River at Salmon Arm Zinc Total (ug/l) Figure 71 BC Max DW Guideline 5 ug/l Zinc Total BC Max AW Guideline Range 3-Day-BC AW Guideline Range CCME Max AW Guideline Turbidity (NTU) Jan-88 Jan-9 Jan-92 Jan-96 Jan-98 Jan- Jan-2 Jan-4 Canada British Columbia Water Quality Monitoring Agreement 78
88 Water Quality Assessment of the Salmon River at Salmon Arm Zinc Total (ug/l) Figure 72 Zinc Total CCME Max AW Guideline Turbidity (NTU) 8 BC Max DW Guideline 5 ug/l BC Max AW Guideline Range ug/l 3-Day-BC AW Guideline Range ug/l Jan-88 Jan-89 Jan-9 Jan-91 Jan-92 Jan-93 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan- Jan-1 Jan-2 Jan-3 Jan-4 Jan-5 Canada British Columbia Water Quality Monitoring Agreement 79
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