Rain barrels and cisterns · California

BAWSCA Rain Barrel and Cistern Rebate (San Mateo County)

Run by BAWSCA with San Mateo Countywide Water Pollution Prevention Program

OpenLast checked October 17, 2026
What you get
San Mateo County installs: 50-99 gal up to $100; 100-199 gal up to $150; 200+ gal up to $200 (county share plus $50 agency share); capped at pre-tax cost; $50 per barrel (up to 2) for BAWSCA agencies outside San Mateo County
Maximum
$200 per household
Who qualifies
Customers of participating BAWSCA agencies; amount depends on your agency; ACWD customers apply via ACWD.
Where
Customers of participating BAWSCA member agencies, mainly in San Mateo County; amount depends on your agency.
Status
Open. FY July 1, 2026 to June 30, 2027, subject to funds.
Type of payment
Rebate
Official program page

What you do

Buy and install a rain barrel or cistern.

Requirements

  • Water account number required to register
  • Limit two rebates per single-family account (four commercial/multifamily)
  • Maintain barrel at least 3 years
  • Meet terms on installation, use and mosquito prevention (linked from page)

How to apply

  1. 1Register and apply online at bawsca.dropletportal.com with your water account number
  2. 2Or submit the paper application (separate forms for San Mateo County and non-county residents)

Timing and deadlines

Up to 8 weeks in prior terms

June 30, 2027; earlier terms required applying within 90 days of purchase

Sources

Last checked October 17, 2026. See something out of date? Tell us.

Sow is not affiliated with any of these agencies or utilities. Amounts and rules change, often at the start of a fiscal year, so confirm the details on the official page before you start a project. How we research these programs

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