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Stormwater Fee Rates
Based on Impervious Surface
The rate that you pay every month is based on the amount of impervious surface – like rooftops and driveways – on your property.
Use this map to see your property's impervious surface.
Residential Rates (Approved Rate as of July 2023)
| Property Type |
Impervious Area (Sq. ft.) |
Monthly Rate |
|---|---|---|
| 0-399 | No Fee | |
| Tier 1 | 400 - 1,000 | $2.94 |
| Tier 2 | 1,001 - 3,780 | $7.36 |
| Tier 3 | 3,781 - 6,620 | $12.52 |
| Tier 4 | 6,621 - 9,500 | $21.34 |
Homes with more than 9,500 square feet of impervious surface pay the commercial rate.
Commercial Rates (Approved Rate as of July 2023)
The approved stormwater fee is a 2.5% (percent) increase from the FY 2023 rate. This rate varies based on the size of the property.
The commercial category includes multi-family properties, offices, institutions, industrial land uses, and single-family properties larger than 9,500 square feet. The fee is solely based on the amount of impervious surface.
How to calculate the fee rate:
Commercial Fee = [Amount of Impervious Surface / 1 Single Family Equivalent Unit (SFEU)] X Approved Stormwater Fee Rate per SFEU
The 1 Single Family Equivalent Unit (SFEU) is 2,260 SQFT and the Approved Stormwater Fee Rate per SFEU is $7.36.
Example: A commercial Property has 47,303 SF of impervious surface.
Stormwater Monthly Fee = (47,303/2,260) X $7.36
Stormwater Monthly Fee = $154.05
Get a Credit
Receive a credit if you detain more stormwater on your property than you're required. Storing stormwater helps manage how much water reaches storm drains and streams. This reduces water pollution and hazardous road flooding. Credits are typically for commercial properties with a lot of impervious surface.