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Phone: 913-715-8500

11811 S. Sunset Drive, Suite 2500, Olathe, Kansas 66061

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Industrial Pretreatment: Wastewater Discharge

Since 1981, communities across the country have been able to regulate industrial discharges into wastewater treatment plants in order to enhance the ability of those plants to protect human health and the environment. Johnson County Wastewater's Industrial Pretreatment Program extensively regulates industrial wastewater discharges so that toxic materials do not interfere with wastewater treatment systems or pass through to receiving streams. The program issues permits, inspects, and monitors industries to control discharges to the sanitary sewers. This program also investigates instances of illegal and harmful wastewater discharges.

Local Limits

Local limits headworks analyses submitted by Johnson County Wastewater have been reviewed by both the U.S. Environmental Protection Agency and the Kansas Department of Health and Environment and found to meet the requirements of the General Pretreatment Regulations at 40 C.F.R. Parts 403.5(c)(1) and 403.8(f)(4).  Both agencies approved the local limits as proposed. A public notice was published in the Kansas City Star and in the Olathe News on March 31, 2018.

These technically-based local limits, or more specifically, Maximum Allowable Industrial Loadings, have been approved as mass limits that apply to the aggregate of all Significant Industrial Users on a per wastewater treatment plant basis.

The approved local limits under each current wastewater treatment plant's conditions are available for your review.  Both the Maximum Allowable Headworks Loading (MAHL) and the Maximum Allowable Industrial Loading (MAIL) for each pollutant are shown in the tables.

Johnson County Wastewater will periodically test its wastewater treatment plants' influent to verify that the MAHLs are not exceeded.

Prohibited Discharges

A sanitary sewer is a system of underground pipes designed to carry domestic sewage from bathrooms, sinks, kitchens, and other plumbing components to a wastewater treatment plant where it undergoes various treatment processes before it is ultimately discharged into the environment.  The sanitary sewer system should never be used for disposal of anything other than domestic wastewater; without first obtaining the proper, written, authorized permit issued by Johnson County Wastewater.  Disposal of chemicals or hazardous substances such as: oils, grease, gasoline, paint, anti-freeze, etc. to the sanitary sewer system may cause damage to our environment and create potential safety hazards for county workers and residents alike.  Additional information on proper disposal of hazardous wastes and materials is available from the Johnson County Department of Health and Environment.

Pretreatment Documents