Formula for calculation.
Oklahoma City Municipal Code § 47-523
in effect§ 47-523. - Formula for calculation.
(a) The industrial user's surcharge shall be calculated by the following formula:
Cu = (Qu)(Qr) + (Bu)(Br) + (Su)(Sr)
Where:
Cu | = | annual user surcharge
Qu | = | user's annual flow in millions of gallons
Qr | = | unit cost for flow in dollars per million gallons
Bu | = | user's annual discharge of excess BOD in pounds
Br | = | unit cost for BOD in dollars per pound
Su | = | user's annual discharge of excess suspended solids in pounds
Sr | = | unit cost for suspended solids in dollars per pound
and excess BOD is defined as the BOD contributed at a concentration greater than 250 milligrams per liter; excess suspended solids is defined as the suspended solids contributed at a concentration greater than 300 milligrams per liter.
(b) Unit costs shall be calculated as follows:
Qr = 0.5(OCt) + OCs / Qt
Br = 0.3(OCt) / Bt
Sr = 0.2(OCt) / St
Where:
OCt | = | annual operating cost of wastewater treatment plants
OCs | = | annual operating cost of sewer collecting systems
Qt | = | annual flow rate to the wastewater treatment plants in millions of gallons
Bt | = | annual total BOD loading to the wastewater treatment plants in pounds
St | = | annual total suspended solids loading to the wastewater treatment plants in pounds.
(Code 1970, § 31-43(b); Code 1980, § 47-118)
Source: City of Oklahoma City, Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/ok/oklahoma_city/codes/code_of_ordinances?nodeId=OKMUCO2020_CH47SESEDI_ARTVIIIRACHBICOPR_DIV3INWASU_S47-523FOCAFetched: 10/28/2026