MARAMA Mid-Atlantic Regional Air Management Association

PM_2.5 Monitoring Information

Background

On July 18, 1997, in accordance with the Clean Air Act, the U.S. Environmental Protection Agency (EPA) issued revised national ambient air quality standards (NAAQS) for particulate matter (PM). The decision to revise the NAAQS for particulate matter reflected current understanding of the serious effects of this pollutant on public health. As a part of this action, EPA added new NAAQS for very small particles known as PM_2.5 (particles with an aerodynamic diameter less than or equal to 2.5 micrometers). For more information about the PM_2.5 standard, see EPA's website.

Links to states that provide continuous PM_2.5 data in near real-time:

• North Carolina
• Delaware
• New Jersey
• Pennsylvania

• Delaware - Final Fine Particulate (PM_2.5) Monitoring Network
• Maryland - Air Quality Standard & Monitoring Plan
• Pennsylvania - Annual Monitoring Plans

Map of Maryland Sites - (Adobe Acrobat format)

Table of PM_2.5 Monitoring Sites - (Adobe Acrobat Format)

PM_2.5 Speciation Trends Network (STN) Monitors in the MARAMA Region - (Adobe Acrobat Format)

Additional Information for PM_2.5 Continuous Monitoring Sites - (Adobe Acrobat Format)