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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 (RA) 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 $402/acre-foot for all other uses.

Proposed Rate Increase for Pumped Groundwater
Revenue from the RA helps ACWD offset its costs to replenish and maintain groundwater supplies for the benefit of the users of the groundwater basin.  An 8.7% increase in the RA rate for uses other than municipal and agricultural is recommended to generate sufficient revenue to cover expected basin-related capital and operating costs.  This would change the rate from $402 to $437 per acre-foot of groundwater extracted, effective July 1, 2018.  Only property owners with a well, well owners, and operators of wells (or other groundwater extraction facilities) within the ACWD-managed Niles Cone Groundwater Basin would be affected by this proposal.