Toledo Pretreatment Program

Water pretreatment regulates discharge of industrial waste into the sanitary sewer system, protecting operation performance of the wastewater treatment facility and enhancing the water quality of runoff.

The pretreatment program issues permits to industrial wastewater dischargers, samples permitted dischargers, and ensures that all laws and regulations are complied with. Sample data collected are used in the calculation of surcharge fees.

Unusual Discharge

Unusual discharge (TMC 930.08) is a discharge to the City sewer system that meets any of the following criteria:

  1. Discharge is through a non-permanent entry point into the sewer system.
  2. Discharge is not the result of a normal business operation.
  3. Discharge is a one-time special discharge.

Baseline Monitoring Reports

A discharge orders permit is required to discharge industrial wastewater to the City’s sanitary sewer system. This applies to all industries that are subject to any of the following:

  • Federal categorical pretreatment standards
  • The facility discharges an average of more than 25,000 gallons per day of process wastewater
  • The facility discharge is more than 5% of the hydraulic or organic capacity of the City’s Bay View Wastewater Treatment Plant.

Fats, Oils, and Grease

Grease from cooking meat, fats, butter, and dairy products should never be drained into a sink. These sticky substances build up in sewer pipes and can eventually lead to expensive plumbing problems.

The amount of oil and grease discharged into the sewer cannot exceed 250 mg/L (for a single grab sample) or an average of 100 mg/L (for multiple grab samples). Establishments are required to keep the following written records:

  • dates of monthly checks
  • dates of trap/interceptor cleaning
  • total solids & grease removed
  • method of disposal
  • manager’s signature

These records shall be maintained onsite for inspector’s review and shall be kept for a period of three years. Failure to maintain onsite records or falsification of records may result in a penalty. (TMC 930.12)

Dental Amalgam Standard

The Dental Amalgam Standard (40 CFR 441), published June 14, 2017, requires dental offices that place and/or remove amalgam to install and maintain amalgam separators or equivalent devices. All dental offices are required to submit a one-time compliance report and dental discharge initial certification form.