Laws & Regulations
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Sulfur Dioxide (SO2) Designations Round 3: North Dakota State Recommendation and EPA Response
North Dakota recommendation for Round 3 area designations and EPA's response.
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Sulfur Dioxide (SO2) Designations Round 3: New Mexico State Recommendation and EPA Response
New Mexico recommendation for Round 3 area designations and EPA's response.
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Sulfur Dioxide (SO2) Designations Round 3: New York State Recommendation and EPA Response
New York recommendation for Round 3 area designations and EPA's response.
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Sulfur Dioxide (SO2) Designations Round 3: Missouri State Recommendation and EPA Response
Missouri recommendation for Round 3 area designations and EPA's response.
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Wisconsin Construction Permit Program Approval History
Construction permit program approval history in Wisconsin.
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Sulfur Dioxide (SO2) Designations Round 3: New Hampshire State Recommendation and EPA Response
New Hampshire recommendation for Round 3 area designations and EPA's response.
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Upcoming Conferences for Tribal Communities
Upcoming Conferences for Tribal Members
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Sulfur Dioxide (SO2) Designations Round 3: New Jersey State Recommendation and EPA Response
New Jersey recommendation for Round 3 area designations and EPA's response.
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Nitrogen Dioxide (NO2) Primary Air Quality Standards - Litigation Associated with Current Review
Litigation associated with the current NAAQS review may involve schedules for the review as well as challenges to the final decisions, and court decisions in these matters.
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Sulfur Dioxide (SO2) Primary Air Quality Standards - Litigation Associated with Current Review
Litigation associated with the current NAAQS review may involve schedules for the review as well as challenges to the final decisions, and court decisions in these matters.
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Historical Cost Equations Documentation for CoST
CoST-related historical cost equations documentation for models and tools maintained by OAQPS
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SO2 Data Requirements Rule January 13, 2017 State Submittals - Tennessee
SO2 Data Requirements Rule January 13, 2017 State Submittals - Tennessee
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Sulfur Dioxide (SO2) Designations Round 3: Massachusetts State Recommendation and EPA Response
Massachusetts recommendation for Round 3 area designations and EPA's response.
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Mashantucket Pequot Tribe
Get air permitting info for the Mashantucket Pequot Tribe of Indians of Connecticut
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Regulations for Emissions from Aircraft Engines
EPA regulations related to smog, soot, and other air pollution from aircraft.
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EPA-issued CAA Permits for Region 1
Tabular listing of EPA-issued Clean Air Act Permits for Region 1
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2015 TRI National Analysis Basic Data Files
The top 100 requested data fields from TRI Reporting Form R and Form A are included in each basic data file.
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How Are You Using the TRI?
Details for those people using TRI data for research or other purposes who want to share that information with EPA.
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Air Permitting Delegations in EPA's New England Region
All Region 1 states have EPA-approved Title V operating permit programs. In addition, all Region 1 states have either SIP-approved NSR/PSD permitting programs or the state has been delegated as the permitting authority for NSR/PSD permits by EPA.
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Utilities and Power Generation Sector Information
Learn about environmental resources for the utilities and power generation sectors.