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Your Storm Drainage and Sanitary Sewer Billing

Storm Drainage Billing

Storm Drainage is an annual charge; every property-commercial and residential-is billed one time per year. Each property owner's Storm Drainage bill is based on a formula using the lot size, the total impervious (or impermeable) surface area, and our billing rates.

Impervious surfaces are areas in which runoff does not soak directly into the ground. These surfaces may include building roof tops, sidewalks, driveways, patios, swimming pools, etc.

The higher the percentage of impervious area on your property, the higher the likelihood for runoff to our system, and the higher your rate per 100 square feet of impervious surface. Conversely, the lower the percentage of impervious area, the less potential for runoff, and the lower your rate per 100 square feet of impervious surface.

Note: per city ordinance, we always use impervious area measurements to calculate storm drainage charges; we never attempt to measure the actual amount of water that runs off any property.

Use the Bill Calculator to estimate your bill.

Calculate Your Storm Drainage Bill

Stormwater Rate Calculator  
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Sanitary Sewer Billing

Sanitary Sewer is billed monthly.

To reduce costs, and as a convenience to customers, we have developed a combination water-sewer bill in conjunction with the Denver Water Department. Denver Water is responsible for meter readings and for processing and sending out the combined bills. Sanitary Sewer charges are based on the water consumption metered by Denver Water.

Every residential sewer customer has a one-month winter billing period (February meter reading). Metered water consumption for this winter period establishes sanitary sewer charges (beginning with the March bill) for the entire year- until the next winter billing period. Even though your water use may increase during the summer, your sanitary sewer charges will remain constant.

The sanitary sewer charge for non-residential property is based on actual metered consumption, or minimum charge, in each billing period during the year.


Pay Your Bill Online

water drop and ripple
You can now pay your annual storm drainage bill online using StormPay.