As part of the Environmental Monitoring for Public Access and Community Tracking (EMPACT) initiative, the Environmental Protection Agency (EPA) has created this site to keep the public informed about air pollution and its effect on health. Recently, the EPA added a map of the full domain of their pilot-scale program, 21 Eastern and Midwestern states, so that visitors can view ozone levels from...

Lichens and the tiny animals called tardigrades ("water bears") that live in them are sensitive to certain air pollutants such as sulfur dioxide. Accordingly, they can be useful bioindicators of air quality. Designed to engage students in the scientific process, this Web site, produced by PathFinder Science, offers a learning program based on lichen cover and tardigrade density and diversity on...

The Ambient Air Monitoring System: Near Real Time Data Web site is presented by the New York State Department of Environmental Conservation. The collected data includes pollutants such as sulfur dioxide, ozone, carbon monoxide, and methane among others, as well as all common meteorological data. Records are collected and reported hourly, and can be viewed by parameter or by station, which are...

PALMS (Particle Analysis by Laser Mass Spectrometry), a laser ion mass spectrometer run by the National Oceanic and Atmospherics Association's (NOAA's) Meteorological Chemistry Group, makes in-situ measurements of the chemical composition of individual aerosol particles. PALMS has a lab version and a flight version, which is carried on the nose of an aircraft. The PALMS Website gives spectral data...