Effective May 2024, EPA tightened the annual health-based National Ambient Air Quality Standard (NAAQS) for fine particulate matter (PM2.5) from 12.0 µg/m3 to 9.0 µg/m3. This change was made after a review of the available...more
4/9/2025
/ Air Pollution ,
Air Quality Standards ,
Clean Air Act ,
Department of Environmental Management ,
Environmental Policies ,
Environmental Protection Agency (EPA) ,
NAAQS ,
Public Comment ,
Regulatory Requirements ,
Rulemaking Process ,
State Agencies
Under the Clean Air Act, sources frequently must undergo “New Source Review” (NSR) permitting, which is a pre-construction permitting program. NSR establishes requirements for new or modified sources prior to initiating...more
4/9/2025
/ Air Pollution ,
Air Quality Standards ,
City and County of San Francisco v Environmental Protection Agency ,
Clean Air Act ,
Clean Water Act ,
Environmental Protection Agency (EPA) ,
NAAQS ,
NSR ,
Permits ,
PSD ,
RCRA ,
Regulatory Requirements
EPA Proposes Removing Affirmative Defense Provisions from Eighteen Clean Air Act Emission Standards -
In a proposed rule published on June 24, 2024, EPA has proposed to remove eighteen affirmative defense provisions for...more
9/26/2024
/ Administrative Procedure Act ,
Affirmative Defenses ,
Chevron v NRDC ,
Clean Air Act ,
Compliance ,
Endangered Species Act (ESA) ,
Environmental Protection Agency (EPA) ,
FIFRA ,
Herbicides ,
Mitigation ,
NAICS ,
National Emissions Standards ,
NESHAP ,
New Source Performance Standards (NSPS) ,
NRDC ,
Regulatory Standards ,
SCOTUS ,
SEC v Jarkesy ,
Seventh Amendment ,
US Fish and Wildlife Service
EPA’s Big Plans for 2023: Top Air Rulemakings We Are Watching -
An environmental lawyer walks into a cocktail party. An often-asked question is: What is happening at EPA in your world? What should we be watching that...more
4/4/2023
/ Air Quality Standards ,
CERCLA ,
Clean Air Act ,
Department of Justice (DOJ) ,
Drinking Water ,
Environmental Policies ,
Environmental Protection Agency (EPA) ,
EPCRA ,
Executive Orders ,
Final Rules ,
Hazardous Substances ,
NAAQS ,
NESHAP ,
Ozone ,
PFAS ,
Proposed Rules ,
RCRA ,
Rulemaking Process ,
Safe Drinking Water Act
EPA recently finalized rules under the Clean Air Act (CAA) establishing federal greenhouse gas (GHG) emissions standards for passenger cars and light trucks for Model Years (MY) 2023 through 2026. The standards are designed...more
New Approach: Proposed PFAS Regulation Erodes TSCA Exemptions -
EPA’s proposed reporting and recordkeeping requirements for Per- and Polyfluoroalkyl Substances (PFAS) under the Toxic Substances Control Act (TSCA) may be...more
1/21/2022
/ ASTM ,
Clean Air Act ,
Environmental Policies ,
Environmental Protection Agency (EPA) ,
Greenhouse Gas Emissions ,
Hazardous Substances ,
Motor Vehicles ,
PFAS ,
RCRA ,
Rulemaking Process ,
Toxic Chemicals ,
Toxic Substances Control Act (TSCA)
If Joe Biden is elected President there will be significant changes in environmental regulation for American businesses. Some changes can (and likely will) take place very quickly, with the stroke of a pen. These could...more
10/28/2020
/ Administrative Procedure Act ,
Boiler MACT Rule ,
Clean Air Act ,
Climate Change ,
Congressional Review Act ,
Environmental Policies ,
Environmental Protection Agency (EPA) ,
Environmental Testing ,
General Elections ,
Greenhouse Gas Emissions ,
Hazardous Substances ,
Regulatory Agenda
Section 112 of the federal Clean Air Act (CAA) requires major sources of hazardous air pollutants (HAPs) to, among other things, control emissions using the maximum achievable control technology (MACT). A major source is a...more