Montana Bioassays and Biomonitoring regulations & environmental compliance analysis

Montana Bioassays and Biomonitoring: What you need to know

Governing Law and Regulations

Montana Pollutant Discharge Elimination System (MPDES) permits: Administrative Rules of Montana (ARM) 17.30.1201 to 17.30.1387

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Montana Water Quality Act, Montana Code Annotated (MCA) 75-5-101 to 75-5-1122

Bioassays: ARM 17.30.641 and ARM 17.30.646

Definitions: ARM 17.30.502

Mixing zones: ARM 17.30.506

Laboratory certification: ARM 37.12.301 to 37.12.346

Licensing procedures: ARM 37.12.305

Laboratory quality assurance (QA): ARM 37.12.336

Reciprocity: ARM 37.12.313

Microbiological testing: ARM 37.12.346

Regulatory Agencies

Montana Department of Environmental Quality (DEQ) Permitting and Compliance Division Water Protection Bureau

Montana Department of Public Health and Human Services (MDPHHS) Laboratory Services Bureau

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

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. In order to protect Montana's water resources, the Montana Department of Environmental Quality (DEQ) issues Montana Pollutant Discharge Elimination System (MPDES) permits that establish the maximum level of pollutants allowed in a wastewater discharge to state waters. Any discharge that is expected to contain toxic pollutants will require bioassay studies and a toxicity reduction schedule where toxicity is confirmed. The state regulates the toxicity of its discharges under the authority of the Montana Water Quality Act.

The DEQ may require additional or more stringent effluent limitations or standards necessary to achieve water quality standards established under federal and state water quality regulations. See the national section BIOASSAYS/BIOMONITORING for more ...


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