Colfax-City Hall
Site ID: 06-061-0004 · 39.1002°N, 120.9538°W
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Monitors
| Parameter | POC | First Year | Last Sample |
|---|---|---|---|
| Ozone | 1 | 1992 | 2025-08-31 |
| PM10 Total 0-10um STP | 1 | 1996 | 2015-04-30 |
| PM2.5 Raw Data | 3 | 2012 | 2019-02-28 |
| Acceptable PM2.5 AQI & Speciation Mass | 3 | 2019 | 2025-08-31 |