Stormwater Utility Fee 


Stormwater Utility Fee Rates

Effective July 1, 2020

Stormwater utility fees are based on the total amount of impervious surface on an individual lot or parcel. 

The current rates support increased funding of projects that help the city comply with Falls Lake Nutrient Management Strategy and Total Maximum Daily Loads (TMDLs) pollution reduction requirements. This also includes funding for the South Ellerbe Creek stormwater restoration, algae floway project, and TMDL projects for bacteria in Northeast Creek and sediment in Third Fork Creek.

Residential Properties - Detached single-family homes, a duplex, or a manufactured home located on an individual lot or parcel.

Tier 1 Illustration

Tier 1 - $42.00 annually between July 1 and June 30.

(Total impervious area less than 2,000 sq. ft.)

Tier 2 Illustration

Tier 2 - $87.00 annually between July 1 and June 30.

(Total impervious area between 2,000 and 3,999 sq. ft.)

Tier 3 Illustration

Tier 3 - $174.24 annually between July 1 and June 30.

(Total impervious area is 4,000 sq. ft. or more.)

Other Residential Properties - Individually owned town homes and condominiums are billed at the Residential Tier 1 rate annually, $42.00.

Nonresidential Properties - Parcels that contain more than two residential units, public/private institutional buildings, commercial buildings, parking lots, churches, etc.

$7.25 monthly per Equivalent Residential Unit (ERU) of impervious area

1 Equivalent Residential Unit (ERU) = 2,400 sq. ft. of impervious area

A survey using statistical regression analysis determined that the average amount of imperious area on a residential lot within the City of Durham was 2,400 square feet.

Stormwater Utility Fee Map

The Public Works GIS Billing Data Group maintains over 1/2 billion square feet of impervious surface area within Durham city limits. An average of 2.5 million square feet of impervious area is added each year as a result of construction and redevelopment.

The amount of impervious surface area on a property is the single most important factor affecting the amount of water, including pollutants, flowing off a property. 

Visit the City of Durham Stormwater Utility Fee Map to view impervious surface area on your property.

The stormwater utility fee

To keep the NPDES Permit, the City of Durham & Residents must fund the following: 

  • Managing the stormwater drainage system
  • Eliminating illegal dumping
  • Tracking our water quality
  • Enforcing the city’s stormwater ordinance
  • Jordan Lake Nutrient Management Rules
  • Falls Lake Nutrient Sensitive Waters Management Plan
  • Total Maximum Daily Load requirements for Third Fork Creek and Northeast Creek.

These program requirements all have their cost. The federal government requires the city to designate a steady source of funds to cover these costs. As with other such expenses, the city has to pass the cost of providing these services on to its residents (this is allowed by State of North Carolina regulations).