Continuous Monitoring

WBEA’s 25 continuous monitoring stations each measure between two and 10 air quality parameters including:

  • Carbon Monoxide (CO)
  • Hydrogen Sulphide (H2S)
  • Total Reduced Sulfur (TRS)
  • Ammonia (NH3)
  • Nitric Oxide (NO)
  • Nitrogen Dioxide (NO2)
  • Nitrogen Oxides (NOX)
  • Ozone (O3)
  • Particulate Matter (PM2.5)
  • Sulfur Dioxide (SO2)
  • Total Hydrocarbons (THC)
  • Methane/Non-Methane Hydrocarbons (CH4/NMHC)

All stations continuously measure temperature, relative humidity, and wind speed and direction. Selected stations measure barometric pressure, global radiation, dew point and surface wetness. WBEA operates two tall towers, 90 m and 167 m, where three dimensional data on wind speed and direction, along with temperature and relative humidity are collected and used in regional dispersion monitoring.

All air quality analyzers are remotely controlled and diagnosed. Daily zero/spans and monthly multipoint calibrations are preformed using United States Environmental Protection Agency (USEPA) certified calibration gases and in situ dilution calibration. A Campbell Scientific CR 3000 data logger at each station scans raw analyzer output every second and stores data in 1 min. (QA data), 5 min., 60 min. and 24 hr. data intervals.

WBEA now collects data digitally from select analyzers in the network. Air analyzers for several parameters have been upgraded to the latest available technology to improve detection limits.