Title 19 Environmental Quality Code Chapter 5 Water Quality Act Section 116 Limitation on effluent limitation standards for BOD, SS, Coliforms, and pH for domestic or municipal sewage.
19-5-116.Limitation on effluent limitation standards for BOD, SS, Coliforms, and
pH for domestic or municipal sewage.
Unless required to meet instream water quality standards or federal requirements
established under the federal Water Pollution Control Act, the board shall not establish, under
Section 19-5-104, effluent limitation standards for Biochemical Oxygen Demand (BOD), Total
Suspended Solids (SS), Coliforms, and pH for domestic or municipal sewage which are more
stringent than the following:
(1) Biochemical Oxygen Demand (BOD): The arithmetic mean of BOD values
determined on effluent samples collected during any 30-day period shall not exceed 25 mg/l, nor
shall the arithmetic mean exceed 35 mg/l during any seven-day period.
(2) Total Suspended Solids (SS): The arithmetic mean of SS values determined on
effluent samples collected during any 30-day period shall not exceed 25 mg/l, nor shall the
arithmetic mean exceed 35 mg/l during any seven-day period.
(3) Coliform: The geometric mean of total coliforms and fecal coliform bacteria in
effluent samples collected during any 30-day period shall not exceed either 2000/100 ml for total
coliforms or 200/100 ml for fecal coliforms. The geometric mean during any seven-day period
shall not exceed 2500/100 ml for total coliforms or 250/100 for fecal coliforms.
(4) pH: The pH level shall be maintained at a level not less than 6.5 or greater than 9.0.
Renumbered and Amended by Chapter 112, 1991 General Session
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