Limitation on effluent limitation standards for BOD, Total Suspended Solids, Bacteria, and pH for domestic or municipal sewage.

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  2. Utah Code
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  5. Limitation on effluent limitation standards for BOD, Total Suspended Solids, Bacteria, and pH for domestic or municipal sewage.

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Affected by 63I-1-219 on 7/1/2029

Effective 5/12/2020
19-5-116. Limitation on effluent limitation standards for BOD, Total Suspended Solids, Bacteria, and pH for domestic or municipal sewage.
  • (1) Biochemical Oxygen Demand (BOD): The arithmetic mean of BOD values determined on effluent samples collected during any 30-day period may 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 may not exceed 25 mg/l, nor shall the arithmetic mean exceed 35 mg/l during any seven-day period.
  • (3) Bacteria:
    • (a) The geometric mean of total coliforms and fecal coliform bacteria in effluent samples collected during any 30-day period may not exceed either 2000/100 ml for total coliforms or 200/100 ml for fecal coliforms. The geometric mean during any seven-day period may not exceed 2500/100 ml for total coliforms or 250/100 for fecal coliforms.
    • (b) The geometric mean of E. coli bacteria in effluent samples collected during any 30-day period shall not exceed 126 per 100 mL nor shall the geometric mean exceed 158 per 100 mL respectively during any 7-day period.
  • (4) pH: The pH level shall be maintained at a level not less than 6.5 or greater than 9.0.




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