GPCD Compliance Option

As amended June 11, 2009


Gallons per capita daily (GPCD) is the third compliance approach for the MOU. The combined water savings from implementation of the Foundational and Programmatic BMPs should produce greater water savings than the Programmatic BMPs themselves. Since most Foundational BMPs are not quantified, the GPCD approach evaluates compliance by evaluating the overall reduction in per capita water demand over time. One measure of efficiency, GPCD, indicates the increase in efficiency in water demand over time, by dividing demand by population, which gives average water consumption value per person served. The GPCD Approach includes the following sections: Potable Water GPCD Equation; Baseline GPCD; GPCD Target; Biennial GPCD Targets; Compliance; Appeals and GPCD Calculation Refinement.

Potable Water GPCD Equation

Potable Water GPCD = (PWI – PWS) / Pop / 365; where
1) PWI = Potable Water Into the retail water agency’s service area distribution system.
2) PWS = Potable Water taken out of the retail water agency’s service area distribution system and:

• placed into storage and/or
• delivered to an agricultural customer through a dedicated agricultural meter, at discretion of the retail water agency.

3) Pop = residential population of the retail water agency’s service area.

Baseline GPCD

The Baseline GPCD shall equal the average annual Potable Water GPCD for the years 1997 through 2006. Signatory Water Suppliers who signed the MOU prior to 1997 and can demonstrate significant investment in water conservation may propose a different Baseline period as outlined in the MOU Compliance Policy.

GPCD Target

For purposes of compliance, the 2018 GPCD Target for all signatories as of July 1, 2009 shall equal Baseline GPCD multiplied by 0.82 (an 18% reduction).

Biennial GPCD Targets

Using the Compliance Table below, for each “Year” in the table, a retail water agency’s Biennial GPCD Target shall equal its Baseline GPCD multiplied by that year’s Target (% Baseline). A retail water agency may choose a starting point as either its Baseline GPCD or its 2006 Potable Water GPCD.

Compliance

For retail water agencies choosing the GPCD Option for compliance with the Programmatic BMPs, the retail water agency shall submit the following calculations along with supporting data as part of their first normal biennial report for that period:

1) Potable Water GPCD for each year in the baseline period;
2) 2018 GPCD Target and five Biennial GPCD Targets; and A retail water agency shall be considered to be in compliance with the BMPs in any reporting period when it submits the following:

1) Complete “Water Supply & Reuse” and “Accounts & Water Use”
2) Supporting data necessary to calculate that reporting period’s Potable Water GPCD; and
3) Calculations showing the reporting period’s Potable Water GPCD is less than or equal to that period’s Biennial GPCD Target, or Highest Acceptable Bound when the period’s Potable Water GPCD has been weather-adjusted.

Compliance will be evaluated in relation to the Compliance Table below and relative progress toward the goal will be acknowledged in Council Compliance Reports. For signatory agencies signing the MOU after July 1, 2009, the compliance table will be read as five increments with reporting goals relative to their 1st through 5th Compliance reports.


Compliance Table
Year Compliance Report Target (% Baseline) Highest Acceptable

Bound (%Baseline)

2010 1 96.4 100
2012 2 92.8 96.4
2014 3 89.2 92.8
2016 4 85.6 89.2
2018 5 82 82

Appeals

An appeals/ adjustment process will be available, as outlined in the MOU Compliance Policy, for substantiated exceptional impacts to GPCD such as exceptional use of potable water for wildfire suppression and significant changes to a signatory’s economic or customer demographics.

Signatories that signed the MOU prior to 1997 (the beginning of the Baseline Period), and that can substantiate significant investments in conservation leading to declines in water consumption as measured by GPCD, may file an appeal to adjust the baseline period to reflect per capita water demands in the period prior to their signing the MOU.

GPCD Calculation Refinement

CUWCC GPCD subcommittee shall provide, no later than December 31, 2009, acceptable methods retail water agencies may use when weather-normalizing data for compliance with this BMP. Additional methods or revisions to these methods may be approved by the Steering Committee from time-to-time.

Has introductionAs amended June 11, 2009


Gallons pe
As amended June 11, 2009


Gallons per capita daily (GPCD) is the third compliance approach for the MOU. The combined water savings from implementation of the Foundational and Programmatic BMPs should produce greater water savings than the Programmatic BMPs themselves. Since most Foundational BMPs are not quantified, the GPCD approach evaluates compliance by evaluating the overall reduction in per capita water demand over time. One measure of efficiency, GPCD, indicates the increase in efficiency in water demand over time, by dividing demand by population, which gives average water consumption value per person served. The GPCD Approach includes the following sections: Potable Water GPCD Equation; Baseline GPCD; GPCD Target; Biennial GPCD Targets; Compliance; Appeals and GPCD Calculation Refinement.
; Appeals and GPCD Calculation Refinement. +