Governing Law and Regulations
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 ...