Systematic Municipal Water Use Accounting and GPCD Calculations

2. Background To provide standardization for administrative review 40-Year Water Planning Water Conservation Plans Permitting Requirements Two considerations System End user

3. Water Use Accounting

9. NM Water Use Accounting Pilot Projects Gallup Ruidoso online at www.ose.nm.us Las Vegas Rio Rancho � results pending It provides detailed understanding of where all the water is going. It can be done. It provides a measure of how well the system is managed It provides a baseline to track improvements Highly recommend including a seasonal sector analysis Becomes a management tool for planning (conservation measures, growth potential, supply versus demand needs, infrastructure needs) Presentations at National conferences are expanding acceptance of the water audit methodology. Philadelphia in its second year.It can be done. It provides a measure of how well the system is managed It provides a baseline to track improvements Highly recommend including a seasonal sector analysis Becomes a management tool for planning (conservation measures, growth potential, supply versus demand needs, infrastructure needs) Presentations at National conferences are expanding acceptance of the water audit methodology. Philadelphia in its second year.

10. GPCD Calculations Researched other state�s approaches Proposed methodology Obtained outside peer review End users measure Goff: PE, 30 years experience in water engineering, economic analysis and cost recovery programs, Nationally recognized expertise in water audits, designed and conducted national and international training on audits, meters, and leak detection, member AWWA Water Loss Control Committee Brown: 18 years experience in municipal water conservation, nationally recognized leader in the field, Director of Conservation for the award winning SAWS conservation programs, lead on (water conservation) Best Management Practices Guidelines Manual for TWDB, new Director for CUWCCGoff: PE, 30 years experience in water engineering, economic analysis and cost recovery programs, Nationally recognized expertise in water audits, designed and conducted national and international training on audits, meters, and leak detection, member AWWA Water Loss Control Committee Brown: 18 years experience in municipal water conservation, nationally recognized leader in the field, Director of Conservation for the award winning SAWS conservation programs, lead on (water conservation) Best Management Practices Guidelines Manual for TWDB, new Director for CUWCC

11. GPCD Research States implementing standardized GPCD Kansas, Arizona, Texas and Florida All States had unique methodology Similarities Diversion over population Differences Adjustments to diversions Concerns Populations calculation Difficult to compare -- System

12. NMOSE Proposed Methodology More than one �GPCD� necessary to paint comparable picture Total System Residential Population calculated by: Persons per household from US Census Bureau Single family residential connections Multifamily units Vacancy rate from US Census Bureau Monthly or seasonal averages helpful for conservation assessment Multi Family connections the Census Bureau provides estimates on the number of units, the better option is to incorporate into billing or meter database when a new MF connection is metered, existing MF connections can be identified during meter reading rounds and either check box of unit�s size or follow up phone calls from office staff Only have to set up once � then add new connectionsMulti Family connections the Census Bureau provides estimates on the number of units, the better option is to incorporate into billing or meter database when a new MF connection is metered, existing MF connections can be identified during meter reading rounds and either check box of unit�s size or follow up phone calls from office staff Only have to set up once � then add new connections

13. NMOSE Proposed Methodology Residential GPCD = total residential billed/ residential population Total System = total production/ (residential population + multifamily population) Difference between total system and residential = ICI and system losses Considering these as separate indicators

14. Implementation NMOSE is currently: Evaluating the research, peer reviews and pilot projects Evaluating the benefits of a potential pilot of the GPCD methodology Considering all options for implementation of both the water use accounting and GPCD methodologies

15. Questions? Contact information: John Longworth john.longworth@state.nm.us 505-827-6121 www.ose.state.nm.us/water-info/conservation