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Conroe Relocated C78/A321

Find Site:       
  • EPA site number: 48-339-0078
  • State: Texas
  • County: Montgomery
  • City: Conroe
  • Address: 9472A Hwy 1484
  • Site coordinates:
    • Latitude: 30° 21' 1.09" North (+30.350302°)
    • Longitude: 95° 25' 30.46" West (-95.425128°)
    • Elevation: 77 m (253 ft)
  • Maintained by: TCEQ Houston Regional Office
Area Map Overall site view Street level Map
Northwest North Northeast
Southwest South Southeast
Current Measurements
Monthly Summary Report
Yearly Summary Report
  • Real-time monitoring since: Friday, October 26, 2001
  • Current status: Active
  • Continuous monitors located at this site:
    • Met Data
    • Ozone
    • Oxides of Nitrogen
    • Fine Particulates (PM-2.5)
  • Parameters currently being monitored:
    • Pollution parameters:
      • Nitric Oxide
      • Nitrogen Dioxide
      • Oxides of Nitrogen
      • Ozone
      • PM-2.5 (Local Conditions) Acceptable
    • Meteorological parameters:
      • Wind Speed
      • Resultant Wind Speed
      • Resultant Wind Direction
      • Maximum Wind Gust
      • Standard Deviation of Horizontal Wind Direction
      • Outdoor Temperature
      • Solar Radiation
  • Parameters that have been monitored but are no longer active:
    • Pollution parameters:
      • NOy
      • Nitric Oxide
      • PM-2.5 (Local Conditions)

PLEASE NOTE:  This data has not been verified by the TCEQ and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from TCEQ ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.

Following EPA reporting guidelines, negative values may be displayed in our hourly criteria air quality data, down to the negative of the EPA listed Method Detection Limit (MDL) for the particular instrument that made the measurements. The reported concentrations can be negative due to zero drift in the electronic instrument output, data logger channel, or calibration adjustments to the data. Prior to 1/1/2013, slightly negative values were automatically set to zero.