Residential Discount Calculator

Locations where stormwater flows when it drains from your roof areas

Check all of the locations where stormwater flows when it drains from your roof areas. Check all of the conditions that apply at your property—your roof runoff may be going to more than one place.

Off of my property… to street, drainage ditch, sewer, stream or other location

Check this if some or any of your downspouts have roof runoff that leaves your property. This includes downspouts that lead to your driveway and then off of your property, as well as drains that go directly to a street, sewer, drainage ditch, stream, river or other area off of your property.

From the roof direct to drywells, French drains or soakage trenches on my property

From the roof direct to a swale, lawn, garden or landscaped area to infiltrate on my property

From the roof direct to cisterns or rain barrels that allow for overflow onto my property

From the roof to a holding facility, stormwater planter or pond that slowly releases stormwater off my property

Other kinds of on-site stormwater management on your property

Check all of the following conditions that apply to your property.

I have installed an ecoroof on a portion or all of my buildings

The footprint (or total area) of buildings, driveways, patios, walkways, or other hard surfaces on my property cover less than 1,000 square feet

There are 4 or more trees on my property that are taller than 15 feet

This does not include trees in the landscaped parking strip or public-right-of-way.

Monthly Stormwater Management Charges

Off-site:

On-site:

Total:

Stormwater Discount

This section shows how your discount will be applied to your utility bill. The discount is pro-rated on a quarterly basis depending on the length of your utility billing cycle.

Clean River Reward Discount:

Adjusted Stormwater Management Charge:

If you have questions about how to register or how the discount is calculated, please call (503) 823-1371.

The City of Portland, Oregon

Environmental Services

working for clean rivers

Residential Discount Calculator