Wastewater Management- Customer Service How Sewer Rates are
Calculated Pretreatment surcharges are assessed to each
classification to pay for the cost of wastewater treatment.
There are three main classifications for wastewater billing.
These are Sewer billing is done bi-monthly using various billing
methods according to the different classifications. Residential
customers are billed a flat rate according to the number of
living units. Commercial and some light industrial customers are
billed based on their flow (water usage or wastewater
discharged), at a rate according to the estimated strength of
their wastewater. Heavy industrial users, which generally do not
have a well characterized wastewater stream, are billed based on
bimonthly flow and loadings information obtained through regular
sampling of their wastewater discharge.