Laws & Regulations
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NPDES Permit for Keller Transport Spill Site in Montana
Under National Pollutant Discharge Elimination System permit number MT0030805, Keller Transport, Inc. is authorized to discharge from its spill site in Lake County, Montana, to Flathead Lake.
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NPDES Permit for Symes Hot Springs Hotel and Mineral Baths in Montana
Under NPDES permit MT0030619, Symes Hot Springs, Montana, is authorized to discharge from its mineral baths and pools located in Sanders County, Montana, to Hot Springs Creek.
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NPDES Permit for Town of Hot Springs Wastewater Treatment Facility in Montana
Under NPDES permit MT0020591, the Town of Hot Springs, Montana, is authorized to discharge from its wastewater treatment facility located in Sanders County, Montana, to a ditch discharging to Hot Springs Creek.
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NPDES Permit for Woodcock Home Addition Wastewater Treatment Facility in Montana
Under NPDES permit MT0030554, the Salish and Kootenai Housing Authority is authorized to discharge from its Woodcock Home Addition Wastewater Treatment Facility in Lake County, Montana, to a swale draining to Middle Crow Creek.
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Notification: Engagement Letter for the FY 2026 U.S. Chemical Safety and Hazard Investigation Board Financial Statement Audit
Notification: Engagement Letter for the FY 2026 U.S. Chemical Safety and Hazard Investigation Board Financial Statement Audit
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NPDES Permit for Sunlight Ranch Company, Little Horn Unit in Montana
Draft permit and statement of basis MT0029424 for a beef cattle feedlot located on the Crow Reservation at the SW ¼ of Section 3, NW 1/4 of Section 10, Township 9 South Range 34 East, Montana Principal Meridian.
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WIIN Grant: Reducing Lead in Drinking Water
A website to outline the new WIIN Act grant programs.
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Superfund Five-Year Review Annual Report to Congress
EPA is responsible for reviewing Superfund remedial actions at least every 5 years where hazardous substances will remain on site above levels that allow for unlimited use and unrestricted exposure. Access the annual reports presented to Congress.
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Interim Enhanced Surface Water Treatment Rule Documents
The IESWTR balances the need for treatment with potential increases in disinfection by -products. The materials found on this page are intended to assist public water systems and state in the implementation of the IESWTR.
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Surface Water Treatment Rules
A page for Surface Water Treatment Rules that provides a summary, history, and compliance information.
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State Program Approval Policy and Guidance
Find EPA policies and guidance on approval of state underground storage tank programs.
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Superfund Program Implementation Manual
Read the Superfund Program Implementation Manual (SPIM), which provides guidance to the Office of Superfund and Emergency Management, the Office of Site Remediation Enforcement, and several other offices.
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Sanitary Survey Guidance Manuals
This page contains guidance manuals for primacy agencies conducting sanitary surveys at drinking water systems.
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Ground Water Rule Compliance Help for Water System Owners and Operators
EPA has developed materials for drinking water system owners and operators. The materials on this page can assist in complying with requirements of the Ground Water Rule (GWR).
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Federal Requirements for Class V Wells
This page has information on the basic (minimum) requirements for owners or operators of Class V wells.
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Large-Capacity Cesspools
This page will help you provides general information about large-capacity cesspools, why large-capacity cesspools are banned, how to properly close them when no longer in use.
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Protecting Underground Sources of Drinking Water from Underground Injection (UIC)
Provide information on: individual injection well classes; regulations specific to each well class; technical guidance; compliance assistance; federal, state, and tribal/territory roles and responsibilities.
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Draft Class VI Guidance Documents Open for Public Comment
This page provides links to draft Class VI guidance documents open for public comment.
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Public Notification Rule
The Public Notice rule is part of the Safe Drinking Water Act (SDWA). The rule ensures that consumers will know if their drinking water does not meet standards; or if the water system fails to test its water or has been granted a variance or an exemption.