Skip to Main Content View Text-Only

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

More Contact Info

Collaboratively working for accurate measurements

site visitSince Environmental Services bills for impervious area (IA) based on each 1,000 square feet, small discrepancies in the measurements will not affect your bill. Although our spatial analysis maps are updated regularly, we know there are limitations on what we can see from an aerial perspective.

We can review any independent drawings or documentation you submit regarding the hard surface area measurements of your property. If we are unable to resolve a discrepancy between our measurements and yours, we can find a mutually agreeable time to visit your property and re-examine areas of our map which are of concern to you.

Please contact us at 503-823-7124 to discuss the IA and the stormwater charges on your bill.