Learn the Issues
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Method 304B - Biodegradation Rates - Scrubber Option
Promulgated CFR Test Method 304B Determination of Biodegradation Rates of Organic Compounds (Scrubber Option).
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Public notices at U.S. EPA
U.S. EPA's one-stop location for EPA-issued public notifications.
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Colorado Smelter Postcard 2025
Postcard of resources for Colorado Smelter in Pueblo, Colorado
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Colorado Smelter
EPA information on past and ongoing cleanup work in Pueblo Colorado. Includes community resources and technical documents, on the science and environmental protection laws behind cleanup decision for the Colorado Smelter Superfund Site.
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Contaminant List
EPA has identified the chemical substances as contaminants of concern (COCs) for the the Colorado Smelter Superfund site.
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Compliance & Enforcement in Indian Country
Facilities in Indian country must comply with environmental laws and requirements in the same manner and to the same extent as any other regulated facility located outside Indian country.
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Title V Permitting Program Evaluations for Alabama
EPA Title V and New Source Review program evaluation conducted on June 25-26, 2013 for Alabama ADEM, and program evaluation of Jefferson County DOH, conducted December 12-13, 2019
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Anadarko - Bob Douglas Outer Continental Shelf (OCS) Draft Permit Fact Sheet
Anadarko - Bob Douglas Outer Continental Shelf (OCS) Fact Sheet
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Title V Permitting Program Evaluations for Mississippi
EPA Title V and New Source Review program evaluation conducted on the Mississippi Department of Environmental Quality
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Anadarko - Bob Douglas Outer Continental Shelf (OCS) Draft Permit Public Notice
Anadarko - Bob Douglas Outer Continental Shelf (OCS) public Notice
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FOIA Libraries and Repositories
Freedom of Information Act Regional Libraries page contains frequently requested environmental information by region.
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Quality Assurance Project Plans for Tribes in Region 10
Overview for Region 10 tribes preparing Quality Assurance Project Plans (QAPPs) for EPA.
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National Environmental Leaders in Asthma
The National Environmental Leaders in Asthma recognizes health plans, healthcare providers and communities in action that demonstrate an environmental component to address asthma triggers, collaborate with others and save healthcare dollars.
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Surface Drinking Water Provided by Intermittent, Ephemeral, and Headwater Streams: State Maps
A collection of state maps detailing the percentage of surface drinking water from intermittent,
ephemeral or headwater streams for each county. -
Surface Drinking Water Provided by Intermittent, Ephemeral, and Headwater Streams: Summary of the Analysis
A summary of the analysis detailing the percentage of surface drinking water from intermittent, ephemeral or headwater streams in the continental United States.
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Surface Drinking Water Provided by Intermittent, Ephemeral, and Headwater Streams: State Table
A table detailing detailing the percentage of surface drinking water from intermittent, ephemeral or headwater streams for each state in the continental United States.
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Requirements for Mitigation Bank and ILF Instruments under CWA Section 404
Requirements for Mitigation Bank and In-Lieu Fee Program Instruments
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CWA Section 404 and Swampbuster: Wetlands on Agricultural Lands
Many normal farming, silviculture, and ranching activities that involve discharges of dredged or fill materials into waters of the United States are exempted from Section 404; that is, they do not require a permit.
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Surface Drinking Water Provided by Intermittent, Ephemeral, and Headwater Streams: County Table
A table detailing detailing the percentage of surface drinking water from intermittent, ephemeral or headwater streams for each county in the continental United States.
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Pacific Southwest (EPA Region 9) Monitoring and Assessment Efforts
An overview of Region 9 monitoring and assessment efforts.