Wastewater discharge regulations
King County is responsible for telling organizations that send industrial wastewater to the King County sewer system about federal hazardous waste reporting requirements. This information is provided in accordance with Title 40 CFR Part 403.8(f)(2)(iii).
Industrial wastewater comes from any business system besides toilets or sinks in bathrooms or break rooms. Some industrial wastewater contains hazardous waste. This waste can be dangerous and potentially harmful to people or the environment. The United States Environmental Protection Agency (EPA) lists certain hazardous wastes under the Resource Conservation and Recovery Action (RCRA).
Who must report hazardous waste discharges?
You must notify King County, EPA, and the Washington State Department of Ecology (Ecology) if your facility sends any of these substances to a King County sewer:
- RCRA listed hazardous wastes
- Hazardous wastes with one or more of these characteristics: ignitable, corrosive, reactive, or toxic
When to notify
- Within 180 days from beginning to discharge the substances.
- Within 90 days of the effective date of the published regulation whenever EPA adds additional wastes that your facility discharges to the RCRA list.
How to notify King County
You can notify King County by applying for an Industrial Waste Permit. Identifying the listed or characteristic RCRA hazardous wastes on your wastewater discharge permit application serves as notice to KCIW.
How to notify EPA and the Department of Ecology
To notify the EPA and Department of Ecology, send the following information to the addresses listed below.
- The name and number (or characteristic) of the hazardous waste as listed in 40 CFR part 261
- The type of discharge (continuous, batch, or other)
|EPA Region 10
|Washington State - Ecology
Director, Office of Air, Waste and Toxics
Environmental Protection Agency
1200 6th Avenue
Seattle, Washington, 98101
Manager, Solid and Hazardous Waste Management Division
Department of Ecology
Mail Stop PV-11
Olympia, Washington, 98504
If your facility sends more than 100 kilograms of listed or characteristic hazardous waste per month to the sewer, do the following:
- Estimate the mass and concentration of the hazardous waste in the waste stream during that calendar month
- Provide an estimate of what is expected during the following twelve months
Grant of authority sewerage systems: Washington Administrative Code (WAC) - Chapter 173-208
Dangerous waste regulations: Washington Administrative Code (WAC) - Chapter 173-303
See portions of Sections 28.81, 28.82, and 28,84 on the established fees, rules, and regulations for the disposal of industrial waste into the sewerage system.
King County Public Rules
King County Industrial Waste Local Discharge Limits - PUT 8-13-2-PR (256KB)
Discharge of Construction Dewatering to the Sanitary Sewer - PUT 8-14-1-PR (232KB)
Discharge of Contaminated Groundwater to the Sanitary Sewer - PUT 8-15-1-PR (259KB)
Discharge of Cooling Water into the Sanitary Sewer - PUT 8-16-1-PR (217KB)
Discharge of Hauled Waste at a King County Publicly Owned Treatment Works (POTW) - PUT 8-22-1-PR (229KB)
King County Industrial Waste Fees - PUT 8-24-PR (5.51MB)
Enforcement Response Plan (ERP)
The ERP document outlines how King County will investigate and respond to instances of industrial user noncompliance. The ERP ensures:
- Violations are corrected promptly
- King County’s industrial users receive consistent treatment
- Economic advantages for noncompliance are removed
- King County to recover labor and material costs associated with violations
National categorical pretreatment standards
The federal government has established wastewater discharge limits for specific industries. These industries are called categorical dischargers. Categorical dischargers must get a full King County permit. A permit is mandatory regardless of their wastewater discharge volume. Categorical discharge industries include:
- Aluminum forming
- Battery manufacturing
- Centralized waste treatment
- Circuit-board manufacturing
- Coil coating
- Copper forming
- Electrical and electronic components
- Inorganic chemical manufacturing
- Leather tanning and finishing
- Metal finishing
- Metal foundries
- Nonferrous metal manufacturing
- Pesticide manufacturing
- Petroleum refining
- Pharmaceutical manufacturing
- Porcelain enameling
- Pulp and paper mills
- Wood preserving