Laws & Regulations
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Withdrawal of the Proposed Rule Tribal Baseline Water Quality Standards
On December 20, 2024, the EPA Administrator signed the withdrawal of the proposed rule entitled “Federal Baseline Water Quality Standards for Indian Reservations,” which published in the Federal Register on May 5, 2023.
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Federal Human Health Criteria for Washington State Waters
On November 14, 2022, EPA signed a rule to restore the protective and science-based federal human health criteria (HHC) for the state of Washington’s waters.
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GUG000001: General Permit for Bulk Fuel Storage Facilities in Guam
Final NPDES Permit and Fact Sheet for proposed NPDES General Permit for Bulk Fuel Storage Facilities in Guam. This permit replaces individual NPDES permits for five bulk fuel storage facilities and provides coverage for new eligible bulk fuel facilities.
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Summary of Seattle-Tacoma Puget Sound Area 8-Hour Ozone 110(a)(1) Maintenance Plan
Summary of the Seattle-Tacoma Puget Sound Area 8-hour ozone 110(a)(1) maintenance plan under the Washington air quality SIP.
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Summary of Wallula Particulate Matter (PM-10) Attainment Plan
Summary of the Wallula PM-10 attainment plan under the Washington air quality SIP.
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Pennsylvania SIP, Chapter 121.1 Definitions
Pennsylvania SIP -EPA Approved Regulations
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EPA Approved State Source-Specific Requirements in the Oregon SIP
EPA approved source-specific requirements in the Oregon air quality State Implementation Plan (SIP). 40 CFR Part 52.1970(d).
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Summary of Spokane Particulate Matter (PM-10) Maintenance Plan
Summary of the Spokane PM-10 maintenance plan under the Washington air quality SIP.
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Regulation of Genetically Engineered Microorganisms Under FIFRA, FFDCA and TSCA
Learn about the history and status of regulation of genetically engineered microorganisms.
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Emissions During Periods of Startup, Shutdown, & Malfunction (SSM)
EPA issued a final action to ensure states have plans in place that are fully consistent with the Clean Air Act and recent court decisions concerning startup, shutdown and malfunction (SSM) operations.
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EPA Approved Source-Specific Requirements in the Idaho SIP
EPA approved state source-specific requirements in the Idaho air quality State Implementation Plan (SIP) (40 CFR Part 52.670(d)).
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Volatile Organic Liquid Storage Vessels - Including Petroleum Storage Vessels: New Source Performance Standards (NSPS)
The Environmental Protection Agency (EPA) is proposing amendments to the Standards of Performance for Volatile Organic Liquid Storage Vessels (Including Petroleum Liquid Storage Vessels) for which construction, reconstruction, or modification commenced aft
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Summary of Fairbanks Particulate Matter (PM-2.5) Attainment Plans
Summary of the Fairbanks particulate matter (PM-2.5) moderate area attainment plan under the Alaska air quality SIP.
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Volatile Organic Liquid Storage Vessels - Including Petroleum Storage Vessels: NSPS - Frequent Questions
Frequently asked questions related to the final Bulk Gas Terminals New Source Performance Standards issued in 2024
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Summary of Fairbanks Carbon Monoxide (CO) Maintenance Plan and Second 10-Year Limited Maintenance Plan
Summary of the Fairbanks carbon monoxide maintenance plan and second 10-year limited maintenance plan under the Alaska air quality SIP.
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Proposed Revised Definition of WOTUS - Public Hearing
Agenda, list of pre-registered speakers, and FRN for the public hearing on the revised definition of WOTUS.
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Tacoma-Pierce County Fine Particulate Matter (PM2.5) Standard Attainment Planning
Tacoma-Pierce County fine particulate matter (PM2.5) standard attainment planning under the Washington air quality SIP.
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Summary of Mendenhall Valley Particulate Matter (PM-10) Limited Maintenance Plans
Summary of the Mendenhall Valley particulate matter (PM-10) limited maintenance plan under the Alaska air quality SIP.
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Summary of Spokane Particulate Matter (PM-10) Attainment Plan
Summary of the Spokane PM-10 attainment plan under the Washington air quality SIP.
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Summary of Portneuf Valley (Pocatello) PM-10 Maintenance Plan
Summary of the Portneuf Valley (Pocatello) PM-10 Maintenance Plan under the Idaho air quality State Implementation Plan (SIP).