Rainwater harvesting is the practice of collecting rainwater from rooftops and storing it for later use. This practice can reduce potable water use while also helping to limit erosion and polluted runoff that harm our creeks. Just one inch of rain on a 1,000 square-foot roof produces 600 gallons of runoff. Rainwater harvesting systems and roof gutters should be cleaned seasonally.
Marin Water offers up to 50 cents per gallon of storage, not to exceed actual cost. Total rebates for rain barrels and cisterns may not exceed $1,000 per site.
Remember that harvested rainwater, whether from a rain barrel or a cistern, should not be used for drinking or for human consumption. It should be used for irrigation purposes only.
To Apply:
- Purchase and install a qualifying rain barrel(s) or cistern(s) at the property where potable water service is provided by Marin Water.
- Submit this application, including a copy of your sales receipt within 90 days of purchase. Receipts will not be returned—please make copies for your records.
- Include a completed IRS Form W-9 if you will receive more than $600 in rebates from Marin Water during the tax year.
- Submit photos demonstrating installation requirements are met:
- For professionally installed systems 1-2 photos of the system and an invoice that provides evidence of professional installation.
- For Self-installed systems photos clearly showing the complete system, connection to downspout, screens over openings, overflow pipe, spigot near bottom, label that reads “NONPOTABLE RAINWATER. DO NOT DRINK.”, and backflow if applicable.
- A site inspection may be required. Marin Water will contact you to schedule a site visit, if required
Check out Marin Water's FAQs for Rain Barrel & Cistern Rebates