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Storm Water Services Rate Structure


The Storm Water Services rate structure for single-family homes in Mecklenburg County is based on the size of each property's impervious area (hard surfaces) such as rooftops, driveways and patios.

During a rain storm, the house on the right sends more rainwater into the storm system than the house on the left.  That's because the house on the right has more impervious surface.

Charlotte-Mecklenburg Storm Water Services groups single-family homes into four billing tiers. Homes with the least amount of impervious surface pay the lowest Storm Water rates. Homes with the largest amount of impervious surface pay the highest Storm Water rates.

  Storm water and house sizes    

 The Four Tiers:







 House size in tier I


Tier I

Up to 1,999 sq. ft.
of impervious surface


 House size in tier II



Tier II

2,000 to 2,999 sq. ft.
of impervious surface








 House size in tier III


Tier III

3,000 to 4,999 sq. ft.
of impervious surface


 House size in tier IV


Tier IV

5,000 sq. ft. or more
of impervious surface








Some jurisdictions in Charlotte-Mecklenburg charge a different Storm Water rate for each of the four tiers. Other jurisdictions in Charlotte-Mecklenburg charge one rate for Tier I, and a higher rate that applies to all single-family customers in Tiers II, III and IV. 
The Storm Water fee charged within each jurisdiction (City or Town) is added to the four-tier Storm Water fee
charged countywide. The result is a different Storm Water rate (monthly fee) for each of the four billing tiers. 
Customers pay one total Storm Water fee, usually as a monthly charge. That single payment is divided to cover
storm water management costs in Mecklenburg County as well as in the city or town where the customer lives.

See the current Storm Water rates for each jurisdiction

Which Tier are you in?

To find the size of your property's impervious area, use the GeoPortal.
On the Portal, type your address in the upper left. Click on the Environmental tab. It will list your property's impervious area, plus give you a lot more information.

Remember: Impervious area is NOT the same as the heated square footage of your home. Impervious area includes driveways, rooftops, garages, outbuildings, sheds, patios, and private sidewalks.

Why does impervious surface matter?

The more hard surface on your property, the more storm water that runs off your land. As the amount of runoff increases, so does water pollution and the risk of flooding.

 Your property's Storm Water fee depends on:

1)    the amount of impervious surface on your property (which tier you are in)
2)    where you live (Storm Water rates are different in the City of Charlotte, the six Towns, and in unincorporated areas).

Frequently Asked Questions about Storm Water fees

Why is there a Storm Water fee?