Laws & Regulations
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IPM Analysis of the Final Mercury and Air Toxics Standards (MATS)
EPA used version 4.10_MATS of the Integrated Planning Model (IPM) to analyze the impact of the Mercury and Air Toxics Standards (MATS) rule on the U.S. electric power sector. Learn about the results and view links to documentation.
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IPM Analysis of the Proposed Transport Rule (CSAPR)
Learn about how EPA used Integrated Planning Models (IPM) to analyse the effects of the proposed Cross-State Air Pollution Rule (CSAPR), also known as the Transport Rule.
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Final Determinations of Attainment by the Attainment Date, Extensions of the Attainment Date, and Reclassification of Several Areas Classified as Marginal for the 2015 Ozone Air Quality Standards
EPA issued final actions for 28 nonattainment areas classified as Moderate for the 2015 ozone National Ambient Air Quality Standards (NAAQS). The areas were required to attain the standards by July 20, 2021.
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Williams Four Corners Oil and Gas FIP on Jicarilla Apache Tribal Lands
FIP True Minor Source in Indian Country in the Oil and Gas Sector
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Final Miscellaneous Organic Chemical Manufacturing Risk and Technology Review
air toxics standards, risk and technology review, final rule
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Compliance Requirements for Stationary Engines
This page contains a table of compliance requirements for the RICE NESHAP and NSPS.
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New Source Performance Standards for Stationary Spark Ignition Internal Combustion Engines
This page contains the current new source performance standards (NSPS) for spark ignition internal combustion engines and additional information regarding rule compliance.
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Procedure for Safe Drinking Water Act Program Detection Limits for Radionuclides
Calculations for determining drinking water detection limits for radionuclides.
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Updated MSW Landfill Emission Factors for RTR Risk Modeling
Municipal Solid Waste Landfill Emission Factors, Residual Risk and Technology Review of Subpart AAAA (Corrected for Air Infiltration), NESHAP,
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Proposed Technical Revisions and Clarifications to National Emission Standards for Hazardous Air Pollutants: Municipal Solid Waste Landfills Residual Risk and Technology Review
Information related to the final amendments to the MSW NESHAP
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Final Amendment to the National Emission Standards for Hazardous Air Pollutants for Phosphoric Acid Manufacturing
Final amendment to the Air Toxics Standards for Phosphoric Acid Manufacturing
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Proposed Amendment to the National Emission Standards for Hazardous Air Pollutants for Phosphoric Acid Manufacturing
Proposed amendment to the Air Toxics Standards for Phosphoric Acid Manufacturing
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Final Amendments: Clay Ceramics Manufacturing NESHAP
On October 10, 2019, the U.S. Environmental Protection Agency (EPA) finalized amendments to the National Emission Standards for Hazardous Air Pollutants for Clay Ceramics Manufacturing, codified in 40 CFR 63, subpart KKKKK (Clay Ceramics Manufacturing NE
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Surface Coatings of Large Appliances; Printing, Coating, and Dyeing of Fabrics and Other Textiles; and Surface Coating of Metal Furniture Residual Risk and Technology Reviews
EPA proposed to amend three national emission standards for hazardous air pollutants (NESHAP): Surface Coating of Large Appliances; Printing, Coating, and Dyeing of Fabric and Other Textiles; and Surface Coating of Metal Furniture
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Building Flexibility with Accountability into Clean Air Programs
Clean Air Act programs use a variety of methods to provide companies with flexibility on ways to reduce air pollution while maintaining accountability for achieving required emissions levels.
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Acid Rain Program Applicability Determinations
View EPA's formal responses to written requests for applicability determinations under 40 CFR 72.6 from 2004.
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Reducing Emissions of Hazardous Air Pollutants
What progress has EPA made in reducing toxic emissions?
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Clean Air Act Text
The Clean Air Act is the law that defines EPA's responsibilities for protecting and improving the nation's air quality and the stratospheric ozone layer. The last major change in the law, the Clean Air Act Amendments of 1990, enacted in 1990 by Congress.