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Comprehensive Water Conservation Strategies at CSU San Marcos

CSU San Marcos leads the charge in water conservation with effective strategies across campus. This program highlights initiatives like metering, leak detection, and a robust irrigation management system. By employing waterless urinals and high-efficiency fixtures, the university has achieved substantial annual savings—around $270,000, factoring in sewer costs. Employing innovative monitoring techniques and regular maintenance ensures optimal water use and leak prevention. The program emphasizes sustainability through education and management, ultimately benefiting the campus and community alike.

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Comprehensive Water Conservation Strategies at CSU San Marcos

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  1. CSUsmWater conseRVATION PROGRAM California Higher Education Sustainability Conference

  2. CSU San MarcosWater conservation program • Campus Facts • Campus Water Layout Domestic/Irrigation • Metering/Leak Checking Programs/PMs • Field House Conservation Efforts/Economics • Add Sewer to Domestic • Irrigation Management System • Sprinkler Audit/Review • Meter PMs • Domestic Water Conservation Efforts • Waterless Urinals our strategy • Cooling Tower • Steam Traps • Toilets/Sinks

  3. CSUSMWater conservation program

  4. Metering • Isolate Domestic Water Lines From Irrigation • Best to avoid fire lines to reduce meter size needed • Meter Domestic and Irrigation • Make sure meters are installed per manufactures specs. • Make sure minimum and maximum flows matches meters accuracy parameters. Can be off 30%-40% Building meters need to read down to .5 gpm Check Calibration Regularly

  5. CSU San MarcosWater conservation program • Economics Using todays rates, our avoided costs are ~$167,000/year and increasing each year for water only. Combined with sewer, savings are ~$270,000/year. Include Sewer in avoided cost calculations • With total irrigation meter, you can negotiate removing irrigation from the sewage charge • Expenses can be recouped through chargebacks and detecting leaks

  6. Domestic water efforts • Installed .5 gpm sink aerators from 2.2 gpm • Waterless Urinals (Why it is successful) • Maintenance shop in charge of chemical levels in urinals • Chose model with larger drain opening • Custodial cleans daily per spec • Installed 1.2 gallon toilets with monthly PMs and fix leaks as part of PM. • Maintain building pressures at minimum levels to help reduce leaks.

  7. Domestic water efforts • Daily monitoring of make up water at Central Plant • Make leak repair a priority • Reduced blown down rate of cooling towers • Leak detection program (annually) • Check metering accuracy • Isolate mains to identify leaks. When campus is closed. • (this is a good time to identify bad valves) • Read building meters when buildings are empty.

  8. Irrigation conservation Efforts • Isolate from Domestic Water Metering and install master metering if possible • Irrigation Management System • Easy to use with the following attributes: • Flow monitoring - detects high flow and low flow • Rain monitoring - turns off irrigation based on amount of rain. • Or hydrometers in soil measuring water content. • Evapotranspiration calculations – increases and decreases irrigation based on weather conditions other than rain. • Alarms when leaks or obstructions are detected, electrical alerts, uses Ethernet to short range radio. • Radio remote control for irrigation specialists in field. • Reporting information for consumption, billing and budgeting. • Centralized programing

  9. CSU San MarcosWater conservation program Questions

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