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Summary of BMP Savings Calculator Sample Results SB X7 7 Urban Stakeholder Committee 22 October 2010 Richard A. Mills California State Water Resources.

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Presentation on theme: "Summary of BMP Savings Calculator Sample Results SB X7 7 Urban Stakeholder Committee 22 October 2010 Richard A. Mills California State Water Resources."— Presentation transcript:

1 Summary of BMP Savings Calculator Sample Results SB X7 7 Urban Stakeholder Committee 22 October 2010 Richard A. Mills California State Water Resources Control Board

2 Presentation Overview Summary of Calculations using Draft BMP Savings CalculatorSummary of Calculations using Draft BMP Savings Calculator  27 random sample runs

3 Components of Calculator CUWCC MOU BMPsCUWCC MOU BMPs  1.2 Water loss control  1.3 Metering  3.1 Residential assistance  3.2 Residential landscape  4 CII (including toilets/urinals)  5.2 Landscape budgets Residential toiletsResidential toilets Residential washers & showerheadsResidential washers & showerheads

4 27 Water Suppliers Tested 27 random examples27 random examples  20 CUWCC members

5 27 Water Suppliers Tested North Coast – 1North Coast – 1 San Francisco Bay – 2San Francisco Bay – 2 Central Coast – 2Central Coast – 2 South Coast – 17South Coast – 17 Sacramento River – 2Sacramento River – 2 San Joaquin River – 2San Joaquin River – 2 Tulare Lake – 1Tulare Lake – 1

6 Summary Results Supplier2005 Base- line GPCD GPCD Targets & % Reduction CalculatorMethod 1 Method 3 27 Random Examples Weighted average* % Reduction Unweighted average % Reduction % % % % % % Previous 28 Random/ Nonrandom Examples Weighted average* Unweighted average 12.5% 12.4% 20% 17.6% 24.2% * Weighted by population.

7 Additional GPCD Adjustment Required for 20% Reduction BMP Savings Adjustment Factor Weighted average 13.4%6.6% Unweighted average 13.4%6.6% Note: For 27 random samples.

8 10 Hydrologic Regions North Lahontan South Lahontan Colorado River South Coast Tulare Lake Central Coast San Francisco Bay North Coast Sacramento River San Joaquin River # of Examples

9 Population Distribution of 27 Random Samples Hydrologic Region 1 NC 2 SF 3 CC 4 SC 5 SR 6 SJR 7 TL 8 NL 9 SL 10 CR Total 27 Samples , ,602 % of HR 2%13%4%7%3%7%4%0% 7% Hydrologic Region Total 6746,4051,53519,4892,9021,9782, ,645 HR as % of Statewide 2%17%4%53%8%5%6%0%2% 100% 2005 Population in thousands

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