Each single-family parcel is charged based on an average residential units. Equivalent Residential Units (ERUs) were developed by field verification of open space and impervious surfaces on an average home lot and the costs of the utility equally distributed to the parcels. As of January 1, 2009 it is $7.35 per month. Commercial units are based on how many Equivalent Residential Units (ERUs) there are on the parcel.
Equivalent Residential Units
An ERU is a unit of measure which serves as an index to compare the rainwater (stormwater) runoff generated by different size properties with different amounts of impervious surface. Impervious surface is a surface that will not allow water to pass through to the soil. Rooftops, driveways, parking lots and pools are typical examples of impervious surface. The service fee, which is not a tax, is billed with the other city utilities monthly.