The Louisville Metro Air Pollution Control District is responsible for ambient air pollution monitoring in Jefferson County, Kentucky. APCD currently measures the concentration of 
Ozone, CO, SO2, NO2, PM10 PM2.5 and lead are criteria pollutants for which the US EPA has promulgated National Ambient Air Quality Standards. APCD also measures meteorological parameters such as wind speed and direction, temperature, rainfall, barometric pressure and humidity. The agency sampled for air toxics for a one-year period during 2000 and 2001 and is currently planning more air toxics monitoring. (For more information about the 2000-2001 air toxics monitoring project, see the West Jefferson County Community Task Force website.) Other pollutants the agency has monitored in recent years include lead (Pb) as particulate matter (discontinued at the end of 1997), and total suspended particulates (TSP, also discontinued at the end of 1997). For more information, you can see the lists of monitoring sites and monitors and the map of monitoring sites.
To ensure the validity of these data, APCD incorporates many quality assurance measures into the ambient air monitoring process.
APCD also participates in forecasts for the Louisville area. You can try out the ozone calculator developed for us at the University of Louisville. (Note that it only works correctly for dates that are within the ozone season.)
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