Laws & Regulations
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How EPA Regulates Drinking Water Contaminants
This page describes the EPA's methods and processes of regulating contaminants in drinking water.
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Where do I find more information about the environmental regulation for farms or ranches?
For information about EPA’s environmental regulations related to agriculture please visit the Agency’s Web site for Regulatory and Other Agriculture Related Resources from Federal, State, and Local Sources .
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December 2019 - Proposed Revisions to Testing Regulations for Air Emission Sources
December 2019 - Proposed Revisions to Testing Regulations for Air Emission Sources
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December 2019 - Fact Sheet - Proposed Test Method updates
December 2019 - Fact Sheet - Proposed Test Method updates
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Method 19 - Sulfur Dioxide Removal and Particulate, Sulfur Dioxide and Nitrogen Oxides from Electric Utility Steam Generators
CFR Promulgated Test Method 19 Determination of sulfur dioxide removal efficiency and particulate, sulfur dioxide and nitrogen oxides emission rates.
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Method 323 - Formaldehyde Measurement Using Derivitization
Promulgated CFR Test Method 323—Measurement of Formaldehyde Emissions From Natural Gas-Fired Stationary Sources—Acetyl Acetone Derivitization Method
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PotlatchDeltic Land and Lumber LLC, St. Maries Complex - Title V Air Quality Operating Permit
Title V air operating permit issued to PotlatchDeltic Land and Lumber LLC for its wood products facility located in St. Maries, Idaho on the Coeur d'Alene Reservation.
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Results using EPA’s Power Sector Modeling Platform v6 - May 2018
Download EPA's IPM v6 including documentation, overview, System Summary Report, .DAT, .RPE, .RPT files, Gas Report, State Level Emissions, Generation and Heat Input Summary.
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Analysis of the Revised Cross-State Air Pollution Rule Update
IPM analyses of the Revised Cross-State Air Pollution Update Rule.
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Analysis of the Proposed Revised Cross-State Air Pollution Rule Update
IPM analyses of the Revised Cross-State Air Pollution Update Rule.
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IPM Run Files for Supporting Scenarios
Download Integrated Planning Model (IPM) run files for the scenarios supporting development of the Clean Power Plan.
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Results using EPA’s Power Sector Modeling Platform v6 - May 2019 Reference Case
Download EPA's IPM v6 including documentation, overview, System Summary Report, .DAT, .RPE, .RPT files, Gas Report, State Level Emissions, Generation and Heat Input Summary.
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Best Practices
Guidance and best practices for practitioners who are considering implementation of an emissions trading program.
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Key Terms
Definitions of common terms in emissions trading.
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Emissions Trading Programs
Emissions trading programs including both EPA and state and regional programs.
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About Green Infrastructure
Green infrastructure may be used to comply with CWA requirements, treat stormwater, improve water quality, and mitigate flooding while also beautifying our communities.
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Requirements for In-Use Emissions Testing for Clean Diesel Technology
In-use testing is used to verify the field performance of products that are on the List of Verified Technology.
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Aerodynamic Wind Tunnel Testing for SmartWay Verification
This document provides information on the wind tunnel test method used for SmartWay verification of aerodynamic devices.
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Emission Trading Results
A summary of the results of emissions trading programs since the start of the Acid Rain Program in 1990.