Montana Drinking Water regulations & environmental compliance analysis

Montana Drinking Water: What you need to know

Governing Law and Regulations

Public water supplies: Montana Public Water Supplies, Treatment and Distribution Act, Montana Code Annotated (MCA) 75-6-101 to 75-6-126

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Water Treatment Plant Operators Act, MCA 37-42-101 to 37-42-322

Drinking Water State Revolving Fund Act, MCA 75-6-201 to 75-6-236

Regional Water and Wastewater Authority Act, MCA 75-6-301 to 75-6-329

Public water supplies: Administrative Rules of Montana (ARM) 17.38.201 to 17.38.312

Regulated activities: ARM 17.38.101

Hauling drinking water equipment requirements: ARM 17.38.501 to 17.38.513

Private water supply licenses: ARM 17.38.701

Operator certification: ARM 17.40.201 to 17.40.215

Domestic sewage disposal: ARM 17.38.702

Livestock management: ARM 17.38.703

Regulatory Agencies

Montana Department of Environmental Quality (DEQ) Permitting and Compliance Division Public Water Supply and Subdivisions Bureau

Montana Department of Health and Environmental Sciences (MDHES)

Montana Department of Public Health and Human Services (MDPHHS)

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. Montana generally follows drinking water requirements established under the federal Safe Drinking Water Act (SDWA). Montana has adopted the maximum contaminant levels (MCL) under the SDWA by reference. See the national section DRINKING WATER for additional guidance regarding MCLs.

Montana provides some detailed standards for private water supplies related to operation, hauling of water, licenses, and livestock management.

The state also implements training, testing, and continuing education services for water treatment ...


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