Daily Highs
* The Port of Los Angeles completed its upgrade of the air quality monitoring network on October 12, 2023. Click here for current operational status.
* ALL DATA IS PRELIMINARY.
* DATA IS PRESENTED IN PACIFIC STANDARD TIME EVEN DURING DAYLIGHT SAVINGS TIME.
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| Date | Monitored Parameter | Max Value | Averaging Period | Units | State Standard | Federal Standard | Air Quality Index |
|---|---|---|---|---|---|---|---|
| 2026-08-15 | O3 | 0.038 | 1 hr | ppm | 0.090 | -- | -- |
| 2026-08-16 | O3 | 0.041 | 1 hr | ppm | 0.090 | -- | -- |
| 2026-08-17 | O3 | 0.045 | 1 hr | ppm | 0.090 | -- | -- |
| 2026-08-18 | O3 | 0.047 | 1 hr | ppm | 0.090 | -- | -- |
| 2026-08-19 | O3 | 0.053 | 1 hr | ppm | 0.090 | -- | -- |
| 2026-08-20 | O3 | 0.053 | 1 hr | ppm | 0.090 | -- | -- |
| 2026-08-21 | O3 | 0.021 | 1 hr | ppm | 0.090 | -- | -- |