COVID-19 Risk Level for Multnomah County: High Risk

Calculate Your Clean Rivers Rewards Stormwater Discount

Use a discount calculator to see how your savings will increase with each step you take to let stormwater runoff from your roof, driveway, or parking lot safely soak into the ground on your property.


If you have a single-family or duplex property, use the residential calculator:

Calculate residential discount


If you have a multi-family (three or more units), commercial, industrial, or institutional property, use the commercial calculator (MS Excel required).