Consumptive Water Use and Evaporative Loss Sewer Credit

The purpose of this procedure is to provide customers an opportunity to reduce sewer service costs by allowing billing to be based on the volume of water actually discharged to the sewer system. Generally, sewer volume is billed based on gallons of water delivered to a facility. Water loss from boiler steam, cooling tower evaporation, or industrial process are not considered. It is the customer’s responsibility to review this procedure to determine if the process would be beneficial in their particular situation/circumstance. For questions, contact your PWC Key Account Agent: 

Billing for a Consumptive Water Loss Credit may occur as follows:

A. Meter Loss through Individual Process

PWC may consent to billing for sewer if monthly water consumption exceeds 250,000 at least three (3) times during a 12-month consecutive billing period and the customer will allow PWC to install incoming and outgoing flow meters on the process where water is being lost. If a customer chooses this approach, they must agree to the following:

  1. The volume of consumptive loss through a process must be measured by installation of incoming and outgoing process meters.
  2. The difference between the incoming and outgoing process meters shall be the “consumptive loss” and shall be credited accordingly toward the customer’s sewer volume for that billing cycle. If sewer discharge from the process is not anticipated, one meter is sufficient, and the incoming volume will be used as the deduct value from the facility’s sewer volume.
  3. The customer shall pay the application fee, be billed the cost of installing all incoming and outgoing process meters, and pay a monthly basic facility charge as applicable for each meter installed at the site. Installation costs shall include labor and materials to include the current cost of the meter(s) based on current market value.
  4. PWC shall retain ownership of these incoming and outgoing process meters and shall assume responsibility for ensuring their accuracy and reliability in perpetuity once the meters are installed. PWC reserves the right to revert to estimated sewer billing based on historical data in the event of meter failure.

B. Total Facility Sewer Flow Measurement

If a customer chooses to meter the total volume of water discharged to the sanitary sewer system, PWC will consent to bill sewer based on the actual total volume of water discharged to the sewer system. If a customer chooses this approach, they must agree to the following:

  1. Customer shall install, at their expense, a sewer flow meter in a location where all wastewater discharged to the sanitary sewer flows through the metered location.
  2. Customer shall install the sewer flow meter in an approved location accessible to PWC employees.
  3. PWC System Protection Department shall perform a visual inspection of meter installation.
  4. Customer shall have the meter calibrated by an independent contractor a minimum of once per year. Documentation of this calibration shall be submitted to the PWC System Protection Department.
  5. The meter shall be re-calibrated at the request of PWC in the event accuracy of the meter is questioned for reasons, to include but not limited to:

    – Increase or decrease in sewer flow greater than 25 percent for two consecutive months.
    – Increase or decrease in “sewer flow to water consumption” ratio greater than 10 percent for two (2) consecutive months.

  6. Customer shall notify PWC within 24 hours of any malfunction, damage, or repairs to the flow meter.
  7. PWC reserves the right to revert to sewer billing from the incoming water meter or estimated volume in the event of failure of the flow meter’s proper performance or failure of the customer to properly maintain and submit required documentation within the specified time-frame.
  8. Associated sewer surcharges will be based upon the metered volume.

How to Apply:

  1. Complete the application
  2. Submit the application, required drawing, and a non-refundable application fee to your Key Account Agent.