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Replenishment Assessment Act
Under the authority of the Replenishment Assessment Act of the Alameda County Water District, ACWD charges operators of water production facilities an assessment based on the quantity of groundwater produced.  Replenishment assessment revenue helps pay for ACWD’s work to replenish and maintain the Niles Cone Groundwater Basin. Replenishment assessment fees apply only to water production facilities in the ACWD-managed Niles Cone Groundwater Basin. Water wells, dewatering wells, and chemical investigation extraction wells are considered water production facilities.

Download a copy of the Replenishment Assessment Act.

Replenishment Assessment Rates
Replenishment Assessment rates are reviewed annually; currently, the assessment is $8.00/acre-foot for agricultural and municipal-recreation uses (the maximum allowed under the Replenishment Assessment Act) and $370.00/acre-foot for all other uses. Effective July 1, 2017, the rate for other uses will change from $370 to $402/acre-foot.

The basis for the increase in the replenishment assessment rate for uses other than agricultural and municipal recreation was provided in the 2017 Survey Report on Groundwater Conditions.  Click here for a copy of the Survey Report.  The increase was authorized by the Board of Directors on April 11, 2017, following a public hearing.