Colorado Pretreatment Standards regulations & environmental compliance analysis

Colorado Pretreatment Standards: What you need to know

Governing Law and Regulations

Colorado Water Quality Control Act, Colorado Revised Statutes (CRS) 25-8-101 to 25-8-703

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Pretreatment regulations: 5 Code of Colorado Regulations (CCR) 1002-63.1 to 1002-63.83

Regulatory Agencies

U.S. Environmental Protection Agency (EPA) Region 8

Colorado Department of Public Health and Environment (CDPHE)

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Colorado has not received EPA delegation of its pretreatment program, and federal pretreatment requirements have been incorporated by reference into state regulations. Publicly owned treatment works (POTWs) must follow the federal program requirements and reporting requirements. Requirements for POTWs are incorporated in their National Pollutant Discharge Elimination System (NPDES) permits. Industrial users must follow the requirements of the POTWs they discharge into as well as state regulations. See the national section PRETREATMENT STANDARDS for more information on the federal pretreatment program.

Administration and enforcement. EPA (Region 8) is charged with approving all new pretreatment programs and any changes to existing programs. CDPHE provides support to POTWs in the region by providing technical assistance, on-site visits, and training. CDPHE also has authority to issue control mechanisms to Significant Industrial Users (SIUs) in nonapproved pretreatment programs and to assert enforcement authority over such SIUs.


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