Science & Technology

Delegation Documents for State of Oklahoma

Initial Delegation of NSPS and/or NESHAP to Oklahoma.

New Source Performance Standards (NSPS) Part 60 in Louisiana

CMAQ's Purpose

For more than a decade, EPA and states have used EPA’s Community Multiscale Air Quality (CMAQ) Modeling System, a powerful computational tool for air quality management. Learn more about CMAQv5.2 by browsing our fact sheet.

Great Lakes Initiative (GLI) Clearinghouse

The Great Lakes Initiative Toxicity Clearinghouse is a central location for information on criteria, toxicity data, exposure parameters and other supporting documents used in developing water quality standards in the Great Lakes watershed.

EPA Proposes Approving North Carolina’s Plan to Remove Vehicle Emissions Testing Requirement in 19 Counties

On May 8, 2026, the U.S. Environmental Protection Agency (EPA) proposed to approve North Carolina’s request to remove its vehicle inspection and maintenance (I/M) program—commonly known as emissions testing—from the State Implementation Plan (SIP)

Release Date: May 11, 2026

RTOC Meeting Materials: Summer 2019

Documents related to the Summer 2019 Regional Tribal Operations Committee (RTOC) Meeting in EPA's Pacific Southwest, Region 9.

National Emission Standards for Hazardous Air Pollutants (NESHAP) Part 63 in New Mexico

Lake Michigan Mass Balance Results and Publications

Mass Balance Results and Publications for Lake Michigan

National Emission Standards for Hazardous Air Pollutants (NESHAP) Part 61 in New Mexico

National Emission Standards for Hazardous Air Pollutants (NESHAP) 63 in Oklahoma

How the Great Lakes Coastal Wetlands are Monitored

This content provides the background information on the Great Lakes Coastal Wetland Monitoring Program.

Delegation Documents for State of Arkansas

Initial Delegation of NSPS and/or NESHAP to Arkansas and Initial Delegation of NSPS to Louisiana

Great Lakes CWMP Results and Major Findings

This page will provide background on the Great Lakes coastal wetland monitoring program's data and results.

Delegation Documents for State of Louisiana

Initial Delegation of NSPS to Louisiana

Polychlorinated Biphenyl (PCB)-Containing Fluorescent Light Ballasts (FLBs) in School Buildings

PCB-Containing Fluorescent Light Ballasts (FLBs) in School Buildings
A Guide for School Administrators, Building Owners and Managers and Maintenance Personnel

Final Response to Partial Reclamation Variance Petition from HVF Precious Metals, LLC

EPA is requesting comment on a proposed response to a petition requesting variances from the classification of solid waste under Title 40 of the Code of Federal Regulations (CFR) section 260.30(c) for two materials produced by HVF Precious Metals, LLC (HVF