2014 Caledonia and Cayuga Distribution System Annual Water Quality Report

Transcription

1 2014 Caledonia and Cayuga Distribution System Annual Water Quality Report January 1, 2014 December 31, 2014

2 TABLE OF CONTENTS QUALITY MANAGEMENT SYSTEM POLICY 2 DRINKING WATER SYSTEM 3 CALEDONIA AND CAYUGA DISTRIBUTION SYSTEM MAP CALEDONIA AND CAYUGA DISTRIBUTION SYSTEM OVERVIEW EXPENDITURE INFORMATION MULTI-BARRIER APPROACH WATER SAMPLING SUMMARY 5 MICROBIOLOGICAL OPERATIONAL LEAD ORGANIC WATER USE 8 RAW WATER POTABLE WATER REGULATORY COMPLIANCE 10 ADVERSE WATER QUALITY INCIDENTS ANNUAL DRINKING WATER INSPECTION REPORT AVAILABILITY 12 Page 1

3 Quality Management System Policy The Corporation of Haldimand County s Quality Management System policies are to: Ensure our drinking water systems comply with all current legislation and regulatory requirements for the safe supply of drinking water; Ensure financial support is provided to maintain infrastructure integrity to allow safe and consistent delivery of drinking water to our water customers; Commit to review and update our Operational Plans as regulated by the Drinking Water Quality Management Standard in order to continually improve our Quality Management System and to communicate the results with our water customers. Page 2

4 CALEDONIA AND CAYUGA DISTRIBUTION SYSTEM Page 3

5 Caledonia and Cayuga Distribution System Overview Chloraminated water is received from the City of Hamilton s Woodward Water Treatment Plant at the Caledonia Reservoir. Sodium hypochlorite is added to the water to achieve breakpoint and create a free chlorine residual that meets regulatory requirements. The chlorinated water is sent through transmission water mains to the Caledonia distribution system. The Caledonia distribution system s standpipe provides secondary storage and maintains water pressure within the distribution system. Potable water is also sent via transmission water mains to Cayuga. At the Cayuga Reservoir, sodium hypochlorite can be added to increase the disinfectant residual. In 2014, re-chlorination was not required at the Cayuga Reservoir. The chlorinated water is then pumped to the Cayuga distribution system. The Cayuga distribution system s standpipe provides secondary storage and maintains water pressure within the distribution system. The distribution system infrastructure services approximately 11,621 people (2011 Census) and consists of the following infrastructure: Hydrants 387 Valves 698 Sample Stations 16 Water Main 68 kms Haldimand County operates and maintains all aspects of the drinking water system, including the reservoirs and transmission water mains. Expenditure Information Haldimand County and Veolia staff are diligent in prioritizing projects on an annual basis to eliminate unnecessary expenditure, while maintaining existing infrastructure. Using the best available information at the time of this report, significant monetary expenses incurred in the Caledonia and Cayuga Distribution System for 2014 are identified in Table 1. All drinking water expenditure information is not included in this report. Caledonia and Cayuga Distribution System: Caledonia Standpipe Inspection $4,444 Caledonia Pressure Reducing Valve (MSP) $13,707 Distribution System Leak Detection (Caledonia and Cayuga) $9,517 Caledonia Water Main Repair (Grand River Crossing) $174,652 Annual Cayuga Reservoir Calibrations $8,217 Annual Caledonia Reservoir Calibrations $8,217 Caledonia Reservoir Pump Replacement $8,242 Transmission Main Valve Chamber Inspections $3,300 SCADA Technical Support $27,099 Doman/WAN $10,023 Table 1: Caledonia and Cayuga Distribution System 2014 Significant Expenditures Page 4

6 Multi-Barrier Approach Through the Walkerton Inquiry, Justice O'Connor recommended that drinking water is best protected by taking an approach that uses multiple barriers to prevent contamination from affecting our drinking water. The multi-barrier approach attempts to address potential threats by ensuring barriers are in place to either eliminate or minimize their impact. This holistic approach recognizes that each barrier may not be able to completely remove a contaminant, but by working together the barriers provide a high-level of protection. Typical barriers and how Haldimand County addresses them include: Source protection o Source Protection Plans Treatment o Treatment and Disinfection Goals Distribution system o Residual Maintenance Monitoring o Sampling Programs Emergency Preparedness o Emergency Plans Haldimand County has adopted the multi-barrier approach in ensuring a safe, reliable drinking water. Water Sampling To comply with drinking water legislation, drinking water systems are required to monitor their water quality. Haldimand County has a commitment to providing safe, reliable drinking water and is diligent in ensuring that sampling and monitoring programs effectively characterize water quality. All samples are taken by certified operators and tests performed by accredited, licensed laboratories. Microbiological Sampling Microbial quality is one of the primary indicators for the safety of a drinking water supply. Of all contaminants in drinking water, human and/or animal faeces present the greatest danger to public health. Pathogenic or disease causing microorganisms (including certain protozoa, bacteria or viruses) may be found in untreated water supplies. Bacteriological monitoring or testing is a way to detect and thereby control pathogenic bacteria in treated drinking water supplies. Table 2 provides a summary of microbiological sampling completed in the Caledonia and Cayuga Distribution System during Page 5

7 Number of Samples Range of E.Coli Results (cfu/100ml) Range of Total Coliform Results (cfu/100ml) Number of HPC Samples Range of HPC Results (cfu/ml) Caledonia Distribution Cayuga Distribution Table 2: 2014 Caledonia and Cayuga Distribution System Microbiological Sampling Operational Sampling Operational sampling and monitoring is important in maintaining the integrity of each barrier in the multi-barrier approach. Schedule 7 and 8 of Ontario Regulation 170/03 specify requirements for operational checks that municipalities must follow. Table 3 provides a summary of operational samples taken for the drinking water system. Although not included in this report, Caledonia and Cayuga Pumping stations have continuous monitoring of chlorine residuals for all water pumped out of the reservoirs into the distribution systems. Number of Grab Samples Range of Results Free Chlorine Caledonia mg/l Free Chlorine Cayuga mg/l Table 3: 2014 Caledonia and Cayuga Distribution System Operational Sampling Lead Sampling The community lead testing program is a requirement of O. Reg. 170/03 under the Safe Drinking Water Act, Municipal and non-municipal drinking water systems are required to take plumbing samples from private residences and non-residential buildings, as well as samples from the distribution system. Haldimand County is exempt from lead sampling private residences due to having less than 10 per cent of plumbing sample locations from two consecutive periods of reduced sampling exceed the standard. Although residential homes are not sampled for lead, annual ph and alkalinity samples are taken, as well as distribution lead samples every three years. A summary of 2014 sampling has been provided in Table 4. Location Type Number of Samples Range of Results (min#) (max #) Number of Exceedances Plumbing - Lead N/A N/A N/A Distribution - Lead N/A N/A N/A Distribution - Alkalinity mg/l N/A Table 4: 2014 Caledonia and Cayuga Distribution System Lead Sampling Page 6

8 Organic Sampling To protect drinking water from pathogens, a disinfectant (usually chlorine) is added to the drinking water. Disinfectants can react with naturally-occurring materials in the water to form disinfection byproducts, which may pose health risks. A challenge for water system s is controlling risks from pathogens and disinfection byproducts. It is important to provide protection from pathogens while minimizing health risks to the population from disinfection byproducts. Haldimand County samples for Haloacetic Acids (non-regulated) and Trihalomethanes (regulated). More information on each by-product is summarized in Table 5. Disinfection Byproduct How it is formed? Health Effects Trihalomethanes Trihalomethanes occur when naturally-occurring organic and inorganic materials in the water react with the disinfectants, chlorine and chloramine. Some people who drink water containing total trihalomethanes in excess of the MCL over many years could experience liver, kidney, or central nervous system problems and increased risk of Haloacetic Acids Haloacetic acids occur when naturally-occurring organic and inorganic materials in the water react with the disinfectants, chlorine and chloramine. Table 5: Disinfection Byproduct Information cancer. Some people who drink water containing haloacetic acids in excess of the MCL over many years may have an increased risk of getting cancer. All sample results are below the regulated maximum allowable concentrations allowed by the Ministry of Environment and Climate Change. Although Haloacetic Acids are not regulated, Haldimand County takes quarterly samples. Table 6 provides a summary of 2014 sample results. Parameter Sample Date Result Value Unit of Measure Exceedance Haloacetic Acids (HAA5) Caledonia Distribution February May August ug/l Not Regulated November Haloacetic Acids (HAA5) Cayuga Distribution February May August ug/l Not Regulated November Page 7

9 Trihalomethanes Caledonia Distribution February May August ug/l No November Trihalomethanes Cayuga Distribution February May August ug/l No November Table 6: 2014 Caledonia and Cayuga Distribution System Organic Sampling *Note: Results are reported as annual quarterly running averages Water Use Raw Water Haldimand County does not have a Permit to Take Water for the Caledonia and Cayuga Distribution System. All water is obtained from the City of Hamilton s Woodward Water Treatment Plant, which obtains their raw water from Lake Ontario. Potable Water As required by Schedule 22 of Ontario Regulation 170/03, the following tables and figures are intended to provide a summary of quantity and flow rates for water supplied by the Caledonia and Cayuga Distribution System in The Cayuga Reservoir flows are included in the Caledonia flows, as the Caledonia Reservoir supplies water to Cayuga. System Caledonia Reservoir Month Monthly Total Daily Average Maximum Daily m 3 m 3 Flow m 3 January 91,258 2,944 3,886 February 90,864 3,245 4,485 March 97,757 3,371 3,783 April 134,726 4,491 6,769 May 103,345 3,334 4,447 June 109,039 3,635 4,246 July 101,244 3,266 4,252 August 97,048 3,131 3,653 September 91,815 3,061 3,457 October 91,030 2,936 3,298 November 87,892 2,930 3,189 December 86,551 2,792 3,202 Page 8

10 Table 7: 2014 Caledonia Reservoir Monthly Water Quantities and Flow Rates Figure 1: Caledonia Reservoir Monthly Flows System Month Monthly Total Daily Average Maximum Daily m 3 m 3 Flow m 3 January 17, February 18, March 22, April 19, May 19, Cayuga June 18, Reservoir July 16, August 15, September 14, October 14, November 12, December 13, Table 8: 2014 Cayuga Reservoir Monthly Water Quantities and Flow Rates Page 9

11 Figure 2: Cayuga Reservoir Monthly Flows The Engineer s Report for each facility provides the rated capacity identified in Table 9. The rated capacity does not take into account operational and infrastructure limitations. Annually Haldimand County staff review plant performance and capability and assign allocation numbers accordingly. System and Municipal Drinking Water Licence Rated Capacity Maximum Daily Flow (m 3 / day) Percentage of Capacity Caledonia ,000 m 3 /day 6, % Cayuga ,333 m 3 /day 1, % Table 9 Summary Comparison of Rated Capacities and 2013 Maximum Flows Regulatory Compliance Adverse Water Quality Incidents Regulatory compliance requires reporting any adverse water quality incidents to the Ministry of Health (MOH) and the Ministry of the Environment and Climate Change (MOECC). In all instances, corrective action is initiated to resolve the issue. No adverse events occurred in the Caledonia and Cayuga Distribution System in Page 10

12 Annual Drinking Water Inspection The MOECC annually confirms compliance with drinking water legislation by conducting inspections on drinking water systems. All aspects of the drinking water system are reviewed, including treatment equipment, disinfection, training records, and operational data required under the Safe Drinking Water Act, Ontario Regulations 170/03, 169/03 and 128/04. These inspections provide Haldimand County an opportunity to review best management practices and work towards continually improving the operation and management of the drinking water systems. Any issues of regulatory non-compliance are identified and corrective actions issued. The Caledonia and Cayuga Distribution System inspection occurred on February 10, Below is a summary of the key findings from the inspection: Caledonia and Cayuga Distribution System Waterworks # Inspection: February 10, % Rating There were no instances of non-compliance during the inspection period. Recommendations and best practices provided are detailed below: The following issues were also noted during the inspection: 1. During the physical inspection at the Caledonia Standpipe it was observed that the Singer valve that can be used to by-pass the standpipe did not appear to have been exercised in quite some time. The ORO did not have proof that the valve had been exercised since it was installed approximately five years ago. All recommendations have been addressed. The Singer valve has been added to a list of valves that are regularly exercised. This will ensure proper operation of the valve if it needs to be used for bypassing the standpipe. Page 11

13 Report Availability This report can be viewed online at: Reports can also be picked up upon request at any Haldimand County Satellite Office: Cayuga Administration Building 45 Munsee Street North P. O. Box 400 Cayuga, Ontario, N0A 1E0 Phone: Fax: Caledonia Satellite Office 282 Argyle Street South Caledonia, Ontario, N3W 1K7 Phone: Fax: Dunnville Satellite Office 111 Broad Street East P.O. Box 187 Dunnville, Ontario, N1A 2X5 Phone: Fax: Hagersville Satellite Office 1 Main Street South Hagersville, Ontario, N0A 1H0 Phone: Fax: For more information on report content, please contact: Haldimand County Environmental Services Division at: environmental.services@haldimandcounty.on.ca Telephone: Page 12