Stormwater Utility Fee

In 2000, Horry County established the Stormwater Management Department to address issues of quantity and quality of stormwater runoff. At that time, to fund stormwater activities and capital projects to improve drainage and water quality, a Stormwater Utility was established. Since 2009, the mosquito control program has also been funded by the stormwater utility.

Stormwater utility fees are paid by each property owner in the unincorporated areas of Horry County. Similar to other service utilities, like electricity and water, the stormwater fee is based on how much your property uses the drainage system. Fees are based on the gross area and intensity of development of each property (i.e. impervious surfaces), which affect how much stormwater runs off the property and ultimately into the public drainage system. Impervious surfaces prevent or impede natural infiltration of stormwater into the soil and lead to concentrated stormwater runoff. Common impervious surfaces include rooftops, sidewalks, walkways, patio areas, driveways, parking lots, storage area, compacted gravel and soil surfaces, awnings and other fabric or plastic coverings.

Stormwater utility fees appear on real property tax bills and are collected by the County Treasurer with your property taxes. Billing is done by Equivalent Residential Units or ERUs that represent the average gross area and development intensity factor for a typical single family residential property. Single-family homes, townhomes and condominiums are charged a flat fee. Non-residential properties are charged according to a formula that accounts for each property's gross area and development intensity.

Examples of fees for common property types appear in the table below:

Property
Type
Property
Gross Area
Development
Intensity
Factor
ERUs Monthly Fee
per ERU
Monthly/
Annual Fee
Single-Family
Residential
20,000 sq ft 0.25 1 $2.45/ERU $2.45/
$29.40
Commercial 95,832 sq ft 0.40 7.66 $2.45/ERU $18.77/
$225.24
Car
Dealership
130,680 sq ft 0.95 24.81 $2.45/ERU $60.78/
$729.36
Outlet Mall 936,540 sq ft 0.95 177.95 $2.45/ERU $435.98/
$5,231.76
Church 204,732 sq ft 0.20 8.19 $2.45/ERU $20.07/
$240.84
Undeveloped
Large Tract
with Marsh
6,629,832 sq ft
with
3,220,000 sq ft
credit for marsh
0.01
(first
12 acres)
0.0001
(remaining
high
ground)
1.05

0.58
$2.45/ERU $3.99/
$47.88