Collections and Lists
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Responses to 40 CFR Part 75 Petitions - 2022
Petition responses in 2022
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Responses to 40 CFR Part 75 Petitions - 2023
Petition responses in 2023
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Responses to 40 CFR Part 75 Petitions - 2020
Approval for an alternative data substitution methodology.
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Responses to 40 CFR Part 75 Petitions - 2019
Approval for an alternative data substitution methodology.
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Responses to 40 CFR Part 75 Petitions - 2018
Approval for an alternative data substitution methodology.
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Responses to 40 CFR Part 75 Petitions - 2016
EPA's responses (in chronological order) to submitted Part 75 petitions in 2016.
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Responses to 40 CFR Part 75 Petitions - 2014
Find responses to petitions submitted by affected units subject to 40 CFR Part 75 in 2014.
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Frequent Questions About CAPD's Power Sector Emissions Data
Frequent Questions for CAPD Power Sector Emission Data
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Clean Air Act Standards and Guidelines for Petroleum Refineries and Distribution Industry
This page contains the stationary sources of air pollution for the petroleum refineries and distribution industries, and their corresponding air pollution regulations.
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2010 1-Hour Sulfur Dioxide (SO2) Primary National Ambient Air Quality Standards (NAAQS) Implementation Guidance Documents
The following documents are Agency non-binding guidance documents and fact sheets relating to the implementation of the 2010 1-Hour SO2 Primary NAAQS.
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Controlled Unclassified Information (CUI)
Provide information in regards to EPA's stance on safeguarding CUI.
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Emergency Planning and Community Right-to-Know Act
was created to help communities plan for emergencies involving hazardous substances. It requires emergency planning by federal, state, and local governments; and requires industry to report on storage, use and release of hazardous chemicals.
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Maryland NPDES Permits
NPDES water permits issued in Maryland.
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EPA in Oregon
Environmental Information, hot topics, and public notices about EPA in Oregon.
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Tribal Programs in EPA's Pacific Southwest (Region 9)
EPA’s Pacific Southwest Region (Region 9) serves 148 federally recognized Tribes within Arizona, California and Nevada to assist environmental programs in Indian Country and ensure Tribes have a voice in decisions that affect their land, air and water.
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Mailing list for Clean Air Act permit actions in EPA Region 10
Sign-up form for mailing list about Clean Air Act permits in EPA's Region 10 (Alaska, Idaho, Oregon and Washington, and 271 tribal nations).
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Health of the Salish Sea Ecosystem Report
The Health of the Salish Sea Report is a collaboration between the U.S. and Canada to examine the health of our shared Salish Sea ecosystem.
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EPA in the Pacific Southwest Videos (2024)
Videos highlighting projects, events and environmental issues in or related to the EPA's Pacific Southwest (Region 9).
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EPA in the Pacific Southwest Videos (2017)
Videos highlighting projects, events and environmental issues in or related to the EPA's Pacific Southwest (Region 9).
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EPA in the Pacific Southwest Videos (2018)
Videos highlighting projects, events and environmental issues in or related to the EPA's Pacific Southwest (Region 9).