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Local Discharge Limits

City of Clearwater
Industrial Pretreatment/Sewer Use Ordinance
Discharge to Sanitary Sewer - Uniform Local Limits


Local Limit (mg/l)







Carbonaceous BOD








Cyanide, Total
















Total Kjeldahl Nitrogen


Total Suspended Solids


Total Phosphorus




Note: Local limits received final FDEP approval in conjunction with ordinance 8322-13- March 31, 2014

Surcharge Limits

Parameter Limit Surcharge Rate
BOD 5 >250 mg/l $ 0.32/lb
TSS >250 mg/l $ 0.32/lb
Total Nitrogen > 35 mg/l $ 0.50/lb
Fats, Oil, Grease > 100 mg/l $ 1.46/lb

*Surcharge is calculated by the average day in excess of the limit [(mg/l above limit) x 8.34 x H2O] x surcharge rate. H2O consumption expressed as million gallons i.e., 70,000 gals = .07 mg.

Prohibited Discharge Standards

Prohibited Discharge

Analyses / Monitoring

Closed-cup Flashpoint

> 140oF (60°C) 40CFR261.21


5.5 9.5 (acceptable range)

Temperature (@ connection to city sewer)

< 122°F (50°C)

General Prohibitions

No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass through or interference. These general prohibitions apply to all users of the POTW whether or not they are subject to categorical pretreatment standards or any other National, State, or local pretreatment standards or requirements.

Specific Prohibitions

Sec. 32.212. General sewer use requirements.

  1. Pollutants which create a fire or explosive hazard in the WWF, including, but not limited to, wastestreams with a closed-cup flashpoint of less than 140° F (60° C) using the test methods specified in 40 CFR 261.21;
  2. Wastewater having a pH less than 5.5 or more than 9.5, or otherwise causing corrosive structural damage to the WWF or equipment;
  3. Solid or viscous substances in amounts which will cause obstruction of the flow in the WWF resulting in interference but in no case solids greater than three-eighths of an inch or ninety-five-one-hundredths of a centimeter in any dimension.
  4. Pollutants, including oxygen-demanding pollutants (BOD, etc.), released in a discharge at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference with the WWF;
  5. Wastewater having an average temperature greater than 122F (50C), at the point of connection with the city's sanitary sewer system;
  6. Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through;
  7. Pollutants which result in the presence of toxic gases, vapors, or fumes within the WWF in a quantity that may cause acute worker health and safety problems;
  8. Trucked or hauled pollutants, except at discharge points designated by the coordinator in accordance with section 32.213(4) of this division;
  9. Noxious or malodorous liquids, gases, solids, or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair;
  10. Wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions, which consequently imparts color to the WRF's effluent, thereby violating the city's wastewater NPDES permit;
  11. Wastewater containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations;
  12. Stormwater, excluding stormwater that has been in contact with an approved industrial process, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, non-contact cooling water, and unpolluted wastewater, unless specifically authorized by the coordinator;
  13. Sludges, screenings, or other residues from the pretreatment of industrial wastes;
  14. Medical wastes, except as specifically authorized by the coordinator in a wastewater discharge permit;
  15. Wastewater, alone or in conjunction with other sources, causing the POTW's effluent to fail a toxicity test;
  16. Detergents, surface-active agents, or other substances which may cause excessive foaming in the WRF;
  17. Fats, oils, or greases of animal or vegetable origin in excess of the established local limit, or in quantities which can impeded or impair flow.

Note: Pollutants, substances, or wastewater prohibited by this section shall not be processed or stored in such a manner that they could be discharged into the WWF.