The stormwater base rate pays for all stormwater utility services except those related to construction projects. It reflects how much a property contributes to stormwater runoff.
Single-family residential properties are charged a fixed rate per parcel. The rate is based on the footage of impervious surface found on an average residential property. Impervious surfaces are hard surfaces, such as roofs or driveways, that don't allow water to percolate into the ground.
Duplexes, triplex and fourplex parcels; residential parcels; multi-family (more than fourplex) units; and mobile-home parks also pay a fixed rate based on the average counterpart property.
Commercial and public property rates are site-specific; these are calculated according to each individual property's actual area of impervious surface.
Vacant properties are charged a flat $1 per acre.