Stormwater Utility Fee

Learn about the Stormwater Utility Fee

Beginning in 2024, the County moved to funding its stormwater management program through a stormwater utility fee. This utility fee replaced the sanitary district tax that customers had been paying since 2008. Customers will receive the first real estate bill with the Stormwater Utility fee in May 2024.

Credit Program

Stormwater at homeThe credit program application period is currently closed. If you take certain actions to reduce stormwater runoff on your property, you can apply for credit Nov. 1 through Jan. 15 to offset up to 35% of your utility bill in 2025. Learn more about what actions are eligible.

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Fee Estimator

Fee Estimator Page.jpg Want to get a better idea of your Stormwater Utility fee and how the new rate was calculated? An online tool is available to help you estimate the number of Stormwater Utility billing units on your property.

Estimate my fee


Stormwater Utility Graphic.pngBrowse our FAQs to find answers to commonly asked questions about the background on the stormwater utility fee, how to qualify for credit opportunities, how your rate was calculated, and more.

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flooded road in arlington

Learn about the process to adopt the stormwater utility fee funding model, including the feasibility analysis and public engagement.

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What Customers Can Expect

A stormwater utility is based on the amount of hard surfaces, or impervious area, on a property, which better correlates with stormwater runoff. As a result, it is fairer way to pay for the County’s Stormwater Management Program. The County is making this change now because the rise in severe flooding in recent years requires us to increase investments in our stormwater system.

There are different customer classes for the stormwater utility fee depending on the type of property you own. Explore more below.

Single-Family Homeowner

SWU-SFH.jpgIf you live in a single-family home, townhome, or duplex, your annual Stormwater Utility fee will be based on the amount of impervious area on your property. The fee will be included on your real estate bill as a separate line item. If you have a mortgage, your mortgage company will pay the fee as part of your escrow. If you are a renter, the fee will be paid by the property manager/owner and may be included in your rent.

Learn more about the different rate tiers for single-family residential homes.

Condominium / Multi-Family Unit Owner

SWU-MFH.jpgMulti-family residential properties, including condominiums and apartments, will be billed a flat fee of 0.18 ERU per unit. If you own a condo, the fee will be included on your real estate bill as a separate line item. If you rent an apartment or condo, the fee will be paid by the property manager/owner and may be included in your rent.

Commercial Property Owner


Non-residential commercial properties will be charged the Stormwater Utility fee based on the amount of impervious area on each property, per ERU ($258 for Calendar Year 2024).

Tax-Exempt Organizations

SWU-TXO.jpgMost places of worship, federal properties, and nonprofit and tax-exempt properties that were exempt from the sanitary district tax will not be exempt from the utility fee. The Stormwater Utility fee will be charged like other services provided by the County (e.g., water, sewer), which are not tax exempt.


More Information

Stormwater Utility Overview Video
English | Spanish

Stormwater Utility Factsheet
English(PDF, 2MB) | Spanish | Amharic | Arabic | Mongolian | Bengali

Stormwater Credit Program Manual
English | Spanish(PDF, 4MB)