Collections and Lists

Void Letters for Hensim USA, Inc.

When a certificate is voided, EPA issues a void letter to the manufacturer.

NPDES Stormwater Program in Region 10

EPA's stormwater program for Alaska, Idaho, Oregon, and Washington (Region 10).

Recent Resources

This is a partial list of web sites of materials (mitigation bank templates, checklists, etc.) that comply with and/or support the mitigation regulations.

Wildfire Smoke and Pregnancy

A list of tools a and databases available online to support children’s health protective decisions.

Petition Information for Reconsideration and Stay Request filed on behalf of the Chemical Safety Advocacy Group for the Accidental Release Prevention Requirements: Risk Management Programs Under the Clean Air Act

Petition for Reconsideration and Stay Request filed on behalf of the Chemical Safety Advocacy Group for the Accidental Release Prevention Requirements: Risk Management Programs Under the Clean Air Act

Petition to EPA for Rulemaking to Adopt Revised NOx Exhaust Emission Standards for On-Highway Heavy-Duty Trucks and Engines

Petition to EPA for Rulemaking to Adopt Ultra-Low NOx Exhaust Emission Standards for On-Road Heavy-Duty Trucks and Engines

Case Studies: Protect your Watershed through Bioassessments and Biocriteria

Case Studies: Protect your watershed through bioassessments and biocriteria

Petition to Add Chitosan to EPA’s Minimum Risk Pesticide Inert Ingredient List and Active Ingredient List

This petition from Zach Wilkinson, COO Tidal Vision Products, LLC, dated October 10, 2018, and amended April 4, 2019, asks that EPA add chitosan (CAS # 9012-76-4) to the list of Inert Ingredients on the EPA Minimum Risk Pesticide List.

Petition Requesting that EPA Adopt New National Standards for On-Highway Heavy-Duty Trucks and Locomotives under Federal Jurisdiction

Petition from Joaquin Valley Air Pollution Control District requesting EPA to undertake rulemakings to reduce NOx and PM2.5 emissions.

Petition for Rulemaking to Amend Agricultural Worker Protection Standard Effective Date

This petition from the National Association of State Departments of Agriculture and the American Farm Bureau Federation, dated December 21, 2016, asks that the Agency amend the Agricultural Worker Protection Standard by postponing the effective date.

Multiple Benefits in a County's Stormwater Control Program

Discovering a Problem in Maine

Case Studies: Benefits of Using Bioassessment Data During Biocriteria Development

Case Studies: Benefits of using bioassessment data during biocriteria development

RACT/BACT/LAER Clearinghouse (RBLC) Products

RBLC Products include User's Manuals, Annual Reports, Data Input Form and the RBLC Standalone Editor (Software for off-line data entry).

Providing Evidence of Water Quality Improvements in Ohio

Addressing Citizen's Concerns in Oregon

Hydraulic Fracturing Study Research Approaches

This page show the five main types of research approaches, which each serve as a tool for determining the conditions under which HF can impact drinking water resources.

Stakeholder Webinar (Sept. 2021): Natural Gas & Petroleum Systems in the GHG Inventory

2021 GHGI September 2021 Webinar Supporting Materials

Stakeholder Webinar (Sept. 2022): Natural Gas & Petroleum Systems in the GHG Inventory

2021 GHGI September 2021 Webinar Supporting Materials