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About the Air Quality Assessment Division (AQAD)

HEID provides scientific and economic expertise on the impacts of air pollution on human health in order to inform development of air quality policies designed to reduce the risks associated with exposures to air pollution.
Tribal Source Water Protection Projects

This page highlights examples of Tribes utilizing a variety of funding sources to fund activities that protect sources of drinking water.
2019 Order Denying a Petition for Object to Title V Operating Permit for Newark Bay

This document is part of the title V petition database.
Guidance on Plantwide Applicability Limitation Provisions Under the New Source Review Regulations

This document is part of the NSR Policy and Guidance Database
Guidance for PM2.5 Permit Modeling

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy and Guidance Database. Some documents in
National Study of Nutrient Removal - Fact Sheets

Fact sheets describing examples of low-cost adjustments to sewage treatment plants to reduce nutrient pollutant discharges
EPA Releases New Science-Based Recommendations to Help More States, Tribes, and Territories Reduce Exposure to PFAS in Fish

EPA News Release: EPA Releases New Science-Based Recommendations to Help More States, Tribes, and Territories Reduce Exposure to PFAS in Fish
- Release Date: July 11, 2024
Calculation of the Part 70 Presumptive Minimum Fee Effective September 1, 2017 through August 31, 2018

Part 70 Presumptive Minimum Fee
Calculation of the Part 70 Presumptive Minimum Fee Effective September 1, 2018 through August 31, 2019

Part 70 Presumptive Minimum Fee
Calculation of the Annual Part 71 Fee for Calendar Year 2019

Part 71 Annual Fee
2017 Petition Requesting the Administrator Object to Title V Permit for Wheelabrator Frackville

This document is part of the Title V Petition Database.
2016 Petition Requesting the Administrator Object to Title V Permit for Pasadena Refinery

This document is part of the Title V Petition Database.
2016 Petition Requesting the Administrator Object to Title V Permit for Flint Hills Resoures - Corpus Christi East Refinery

This document is part of the Title V Petition Database.
2016 Order Responding to 2013 Petition to Object to Seneca Energy II Operating Permit

This document is part of the Title V Petition Database.
2016 Petition Requesting the Administrator Object to Title V Permit for Wheelabrator

This document is part of the Title V Petition Database.
2016 Order Responding to 2015 Petition to Object to Piedmont Green Power Operating Permit

This document is part of the Title V Petition Database.
2017 Petition Requesting the Administrator Object to Title V Permit for Linn Fairfield and Ethyl

This document is part of the Title V Petition Database.
2016 Petition Requesting the Administrator Object to Title V Permit for SWEPCO - Welsh

This document is part of the Title V Petition Database.
Order Responding to 2014 Petition Requesting the Administrator Object to Title V Permit for Pirkey Power Plant

This document is part of the Title V Petition Database.
Columbian Chemicals Proposed Boiler Project

This document is part of the NSR Policy and Guidance Database

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