Environmental Protection

Wisconsin’s Great Waters Annual Photo Contest and Writing Project

Subscribe to receive updates and news about the Great Waters Photo Contest and Writing Project, including when the next calendar is available. Each year, the DNR's Office of Great Waters holds a photo contest and writing project. These…

Wisconsin's Air Quality Trends

There is a statewide network of 30 ozone monitoring sites and 18 fine particle (PM2.5) monitoring sites to measure ambient air quality in Wisconsin. In addition, the DNR monitoring network measures sulfur dioxide, nitrogen dioxide,…

Air Toxics and Mercury

Air toxics, also called hazardous air pollutants (HAPs), are substances either known or suspected to cause cancer or other serious health problems, including damage to the immune, neurological, reproductive and respiratory systems. These pollutants…

Sulfur Dioxide NAAQS Implementation

The U.S. Environmental Protection Agency (EPA) sets National Ambient Air Quality Standards (NAAQS) for criteria pollutants, including sulfur dioxide (SO2). On June 2, 2010, EPA revised the SO2 standard, establishing a one-hour primary standard of 75…

Air Pollution Control Rules

Wisconsin's State Legislature creates and revises the Wisconsin Statutes

Refrigerant Recovery Program

Wisconsin law prohibits the release of regulated refrigerants into the atmosphere. The release of regulated refrigerants generally occurs as refrigeration and air-conditioning equipment is salvaged or dismantled for disposal. The refrigeration…

Air Quality Information for Health Professionals

Health professionals need to understand how air quality can affect the health of patients, students and clients. Whether you are a general practitioner, school nurse, health official, fitness trainer or sports coach, understanding air quality and…

Air Pollutants and Standards

Good air quality is important to your health and the environment. There are many air pollutants that can directly affect your health through breathing, such as air toxics, asbestos, ground-level ozone and particulates. The specific pollutant, its…

Air, Air, Everywhere Poetry Contest

Particle Pollution

Particulate Matter (PM) pollution consists of solid particles or liquid droplets suspended in the air. Fine particles (PM2.5) may be emitted directly into the atmosphere but are more commonly created by reactions of other pollutants, such as…