Missouri Pretreatment Standards regulations & environmental compliance analysis

Missouri Pretreatment Standards: What you need to know

Governing Law and Regulations

Pretreatment standards: 10 Missouri Code of State Regulations (CSR) 20-6.100

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On-site sewage disposal systems: 19 CSR 20-3.060

Regulatory Agencies

Missouri Department of Natural Resources (DNR) Division of Environmental Quality Water Protection Program

Missouri Department of Health and Senior Services (DHSS) Division of Environmental Health and Communicable Diseases Section for Environmental Public Health

U.S. Environmental Protection Agency (EPA) Region 7

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Missouri is fully authorized by the U.S. Environmental Protection Agency (EPA) to administer the federal pretreatment program in the state, and has incorporated the federal requirements into its state regulations. For additional guidance, see the national section PRETREATMENT STANDARDS.

Administration and enforcement. DNR's Water Protection Program administers the state pretreatment program. DHSS is responsible for inspecting and enforcing construction requirements for on-site sewage disposal systems.

State Requirements


10 CSR 20-6.100

The National Pretreatment Program, which Missouri follows, requires large publicly owned treatment works (POTWs) and smaller POTWs with significant industrial discharges to establish local pretreatment programs. The local programs must enforce all national pretreatment standards and requirements in addition to any more stringent local requirements necessary to protect site-specific conditions at the POTWs.

Local Laws

The state regulations do not supersede any pretreatment requirements, including any standards or prohibitions, ...

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