New Mexico State University. Shrubs Vines Tree s Palms Citrus

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1 New Mexico State University Shrubs Vines Tree s Palms Citrus

2 Catching the Rain!

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5 Roman Cistern - Istanbul, Turkey

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10 NEW MEXICO STATE UNIVERSITY Las Cruces, NM MONTHLY AVERAGE PAN EVAPORATION (INCHES)

11 Average 12 Month Rainfall since April 2nd 2007: 8.88 in Annual Rainfall Trend Month Average since Current Month Difference 2007 January 0.38 in 1.10 in (2015) 0.72 in February 0.13 in 0.00 in (2015) in March 0.09 in 0.44 in (2014) 0.35 in April 0.13 in 0.03 in (2014) in May 0.37 in 0.01 in (2014) in June 0.27 in 0.02 in (2014) in July 2.51 in 0.62 in (2014) in August 2.03 in 2.88 in (2014) 0.85 in September 1.81 in 2.41 in (2014) 0.60 in October 0.27 in 0.32 in (2014) 0.05 in November 0.37 in 0.34 in (2014) in December 0.52 in 0.39 in (2014) in Average 12 Month Rainfall since April 2nd 2007: 8.88 in Rainfall for last 12 months: 8.56 in Current 12 Month Rainfall difference: in This table is reflective of 12 month trending at the Las Cruces Weather Station location. This is not official scientific data = deficit

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52 Safe Use of Household Greywater Guide M-106 (aces.nmsu.edu/pubs/_m/m106.html) Revised by Marsha Duttle, Extension Research Assistant College of Agriculture, Consumer and Environmental Sciences New Mexico State University Greywater is water that has been used for washing dishes, laundering clothes, or bathing. Essentially, any water, other than toilet wastes, draining from a household is greywater. Although this used water may contain grease, food particles, hair, and any number of other impurities, it may still be suitable for reuse. Reusing greywater serves two purposes: it reduces the amount of freshwater needed to supply a household, and reduces the amount of waste water entering sewer or septic systems.

53 USES FOR GREYWATER The amount and quality of greywater will in part determine how it can be reused. Irrigation and toilet flushing are two common uses, but nearly any noncontact use is a possibility. Greywater is suitable for irrigating lawns, trees, ornamentals, and food crops. Though irrigation methods in greenhouses may differ greatly from outdoor irrigation, several guidelines for use of greywater apply to both situations. Apply greywater directly to the soil, not through a sprinkler or any method that would allow contact with the above-ground portion of the plants. Root crops which are eaten uncooked should not be irrigated with greywater.

54 USES FOR GREYWATER Plants that thrive only in acid soil should not be watered with greywater, which is alkaline. Use greywater only on well-established plants, not seedlings or young plants. Disperse greywater over a large area, and rotate with fresh water to avoid buildup of sodium salts. In addition, when irrigating outdoors, apply greywater only to flat areas where runoff is not likely.

55 New Mexico Code The state of New Mexico does not require a permit for private residential greywater systems that follow the following guidelines GRAYWATER DISCHARGES: Graywater discharge of less than 250 gallons per day of private residential graywater originating from a residence for the resident s household flower gardening, composting or landscaping irrigation shall be allowed if: A. a constructed graywater distribution system provides for overflow into the sewer system or on-site wastewater treatment and disposal system; B. a graywater storage tank is covered to restrict access and to eliminate habitat for mosquitos or other vectors; C. a graywater system is sited outside of a floodway; D. graywater is vertically separated at least five feet above the ground water table;

56 New Mexico Code The state of New Mexico does not require a permit for private residential greywater systems that follow the following guidelines. E. graywater pressure piping is clearly identified as a nonpotable water conduit; F. graywater is used on the site where it is generated and does not run off the property lines; G. graywater is discharged in a manner that minimizes the potential for contact with people or domestic pets; H. ponding is prohibited, discharge of graywater is managed to minimize standing water on the surface and to ensure that the hydraulic capacity of the soil is not exceeded; I. graywater is not sprayed;

57 New Mexico Code The state of New Mexico does not require a permit for private residential greywater systems that follow the following guidelines. J. graywater is not discharged to a watercourse; K. graywater use within municipalities or counties complies with all applicable municipal or county ordinances enacted pursuant to Chapter 3, Article 53 NMSA 1978; L. graywater is not stored longer than 24 hours before being discharged; M. graywater use for purposes other than irrigation or composting is prohibited, unless a permit for such use is issued by the department; N. graywater is not used to irrigate food plants except for fruit and nut trees; O. graywater is discharged to a mulched surface area or to an underground irrigation system; P. graywater is not discharged closer than 100 feet to a watercourse or private domestic well, or closer than 200 feet to a public water supply well; Q. graywater does not create a public nuisance;

58 New Mexico Code The state of New Mexico does not require a permit for private residential greywater systems that follow the following guidelines. R. for residential units using an on-site liquid waste system for blackwater treatment and disposal, the use of a graywater system does not change the design, capacity or absorption area requirements for the on-site liquid waste system at the residential unit, and the on-site liquid waste system is designed and sized to handle the combined blackwater and graywater flow if the graywater system fails or is not fully used; and S. graywater does not contain hazardous chemicals derived from activities such as cleaning car parts, washing greasy or oily rags or disposing of waste solutions from home photo labs or similar hobbyist or home occupational activities. [ NMAC - Rp, NMAC, 9/1/05]

59 Contact Information: Doña Ana County Cooperative Extension Service 530 N. Church Street Las Cruces, New Mexico Office: (575) Fax: (575) donaanaextension.nmsu.edu