Environmental Monitoring and Data Quality
An Environmental Reading Is Only as Reliable as the Way It Was Collected
A monitor can display a precise number while still giving a misleading picture if it is poorly sited, out of calibration, affected by weather or used outside its intended purpose. Environmental decisions should therefore consider the whole measurement process—not only the value on the screen. Reliable monitoring begins with a clear objective, suitable equipment and documented quality checks that allow an unusual result to be verified and acted on responsibly.
Controls to confirm
- Define what the monitoring must demonstrate, select equipment and locations suited to the pollutant and decision, and record relevant operating, background and weather conditions.
- Complete the required calibration, function, maintenance and contamination checks before and after use, preserving traceable records for the instrument, sample, time and operator.
- Review results against approved criteria and data-quality limits, investigate unexpected values with a verified method, and escalate credible adverse trends without altering or discarding inconvenient data.
Today’s action
Review one active environmental monitor today and confirm its purpose, siting, calibration status, data-quality checks and escalation threshold.
Air Sensors: Regulatory Data and Sensor Data Quality · U.S. Environmental Protection Agency
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