Historical Data
* The Port of Los Angeles is in the process of upgrading its four air monitoring stations with new instrumentation and equipment. The procurement process was completed by the end of September 2022. The instrumentation and equipment will be installed as they are delivered, with all installation completed by mid-October 2023. Click here for details.
* ALL DATA IS PRELIMINARY. DATA IS PRESENTED IN PACIFIC STANDARD TIME EVEN DURING DAYLIGHT SAVINGS TIME.
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| Date | Monitored Parameter | Averaging Period | Value | Units | State Standard | Federal Standard | Air Quality Index |
|---|---|---|---|---|---|---|---|
| 09/26/23 00:00 | O3 | 1 hr | 0.013 | ppm | 0.090 | -- | -- |
| 09/26/23 01:00 | O3 | 1 hr | 0.012 | ppm | 0.090 | -- | -- |
| 09/26/23 02:00 | O3 | 1 hr | -- | ppm | 0.090 | -- | -- |
| 09/26/23 03:00 | O3 | 1 hr | 0.003 | ppm | 0.090 | -- | -- |
| 09/26/23 04:00 | O3 | 1 hr | 0.002 | ppm | 0.090 | -- | -- |
| 09/26/23 05:00 | O3 | 1 hr | 0.002 | ppm | 0.090 | -- | -- |
| 09/26/23 06:00 | O3 | 1 hr | 0.002 | ppm | 0.090 | -- | -- |
| 09/26/23 07:00 | O3 | 1 hr | 0.005 | ppm | 0.090 | -- | -- |
| 09/26/23 08:00 | O3 | 1 hr | 0.012 | ppm | 0.090 | -- | -- |
| 09/26/23 09:00 | O3 | 1 hr | 0.020 | ppm | 0.090 | -- | -- |
| 09/26/23 10:00 | O3 | 1 hr | 0.024 | ppm | 0.090 | -- | -- |
| 09/26/23 11:00 | O3 | 1 hr | 0.020 | ppm | 0.090 | -- | -- |
| 09/26/23 12:00 | O3 | 1 hr | 0.028 | ppm | 0.090 | -- | -- |
| 09/26/23 13:00 | O3 | 1 hr | 0.031 | ppm | 0.090 | -- | -- |
| 09/26/23 14:00 | O3 | 1 hr | 0.038 | ppm | 0.090 | -- | -- |
| 09/26/23 15:00 | O3 | 1 hr | 0.040 | ppm | 0.090 | -- | -- |
| 09/26/23 16:00 | O3 | 1 hr | 0.032 | ppm | 0.090 | -- | -- |
| 09/26/23 17:00 | O3 | 1 hr | 0.034 | ppm | 0.090 | -- | -- |
| 09/26/23 18:00 | O3 | 1 hr | 0.028 | ppm | 0.090 | -- | -- |
| 09/26/23 19:00 | O3 | 1 hr | 0.025 | ppm | 0.090 | -- | -- |
| 09/26/23 20:00 | O3 | 1 hr | 0.026 | ppm | 0.090 | -- | -- |
| 09/26/23 21:00 | O3 | 1 hr | 0.013 | ppm | 0.090 | -- | -- |
| 09/26/23 22:00 | O3 | 1 hr | 0.005 | ppm | 0.090 | -- | -- |
| 09/26/23 23:00 | O3 | 1 hr | 0.005 | ppm | 0.090 | -- | -- |
| 09/27/23 00:00 | O3 | 1 hr | 0.002 | ppm | 0.090 | -- | -- |
| 09/27/23 01:00 | O3 | 1 hr | 0.002 | ppm | 0.090 | -- | -- |
| 09/27/23 02:00 | O3 | 1 hr | -- | ppm | 0.090 | -- | -- |
| 09/27/23 03:00 | O3 | 1 hr | 0.002 | ppm | 0.090 | -- | -- |
| 09/27/23 04:00 | O3 | 1 hr | 0.002 | ppm | 0.090 | -- | -- |
| 09/27/23 05:00 | O3 | 1 hr | 0.003 | ppm | 0.090 | -- | -- |
| 09/27/23 06:00 | O3 | 1 hr | 0.007 | ppm | 0.090 | -- | -- |
| 09/27/23 07:00 | O3 | 1 hr | 0.013 | ppm | 0.090 | -- | -- |
| 09/27/23 08:00 | O3 | 1 hr | 0.022 | ppm | 0.090 | -- | -- |
| 09/27/23 09:00 | O3 | 1 hr | 0.025 | ppm | 0.090 | -- | -- |
| 09/27/23 10:00 | O3 | 1 hr | 0.023 | ppm | 0.090 | -- | -- |
| 09/27/23 11:00 | O3 | 1 hr | 0.029 | ppm | 0.090 | -- | -- |
| 09/27/23 12:00 | O3 | 1 hr | 0.037 | ppm | 0.090 | -- | -- |
| 09/27/23 13:00 | O3 | 1 hr | 0.040 | ppm | 0.090 | -- | -- |
| 09/27/23 14:00 | O3 | 1 hr | 0.037 | ppm | 0.090 | -- | -- |
| 09/27/23 15:00 | O3 | 1 hr | 0.035 | ppm | 0.090 | -- | -- |
| 09/27/23 16:00 | O3 | 1 hr | 0.052 | ppm | 0.090 | -- | -- |
| 09/27/23 17:00 | O3 | 1 hr | 0.045 | ppm | 0.090 | -- | -- |
| 09/27/23 18:00 | O3 | 1 hr | 0.023 | ppm | 0.090 | -- | -- |
| 09/27/23 19:00 | O3 | 1 hr | 0.028 | ppm | 0.090 | -- | -- |
| 09/27/23 20:00 | O3 | 1 hr | 0.019 | ppm | 0.090 | -- | -- |
| 09/27/23 21:00 | O3 | 1 hr | 0.018 | ppm | 0.090 | -- | -- |
| 09/27/23 22:00 | O3 | 1 hr | 0.021 | ppm | 0.090 | -- | -- |
| 09/27/23 23:00 | O3 | 1 hr | 0.026 | ppm | 0.090 | -- | -- |
| 09/28/23 00:00 | O3 | 1 hr | 0.027 | ppm | 0.090 | -- | -- |
| 09/28/23 01:00 | O3 | 1 hr | 0.026 | ppm | 0.090 | -- | -- |
| 09/28/23 02:00 | O3 | 1 hr | -- | ppm | 0.090 | -- | -- |
| 09/28/23 03:00 | O3 | 1 hr | 0.035 | ppm | 0.090 | -- | -- |
| 09/28/23 04:00 | O3 | 1 hr | 0.029 | ppm | 0.090 | -- | -- |
| 09/28/23 05:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 09/28/23 06:00 | O3 | 1 hr | 0.037 | ppm | 0.090 | -- | -- |
| 09/28/23 07:00 | O3 | 1 hr | 0.036 | ppm | 0.090 | -- | -- |
| 09/28/23 08:00 | O3 | 1 hr | 0.039 | ppm | 0.090 | -- | -- |
| 09/28/23 09:00 | O3 | 1 hr | 0.042 | ppm | 0.090 | -- | -- |
| 09/28/23 10:00 | O3 | 1 hr | 0.042 | ppm | 0.090 | -- | -- |
| 09/28/23 11:00 | O3 | 1 hr | 0.045 | ppm | 0.090 | -- | -- |
| 09/28/23 12:00 | O3 | 1 hr | 0.043 | ppm | 0.090 | -- | -- |
| 09/28/23 13:00 | O3 | 1 hr | 0.047 | ppm | 0.090 | -- | -- |
| 09/28/23 14:00 | O3 | 1 hr | 0.044 | ppm | 0.090 | -- | -- |
| 09/28/23 15:00 | O3 | 1 hr | 0.039 | ppm | 0.090 | -- | -- |
| 09/28/23 16:00 | O3 | 1 hr | 0.034 | ppm | 0.090 | -- | -- |
| 09/28/23 17:00 | O3 | 1 hr | 0.022 | ppm | 0.090 | -- | -- |
| 09/28/23 18:00 | O3 | 1 hr | 0.014 | ppm | 0.090 | -- | -- |
| 09/28/23 19:00 | O3 | 1 hr | 0.035 | ppm | 0.090 | -- | -- |
| 09/28/23 20:00 | O3 | 1 hr | 0.031 | ppm | 0.090 | -- | -- |
| 09/28/23 21:00 | O3 | 1 hr | 0.039 | ppm | 0.090 | -- | -- |
| 09/28/23 22:00 | O3 | 1 hr | 0.041 | ppm | 0.090 | -- | -- |
| 09/28/23 23:00 | O3 | 1 hr | 0.044 | ppm | 0.090 | -- | -- |
| 09/29/23 00:00 | O3 | 1 hr | 0.047 | ppm | 0.090 | -- | -- |
| 09/29/23 01:00 | O3 | 1 hr | 0.047 | ppm | 0.090 | -- | -- |
| 09/29/23 02:00 | O3 | 1 hr | -- | ppm | 0.090 | -- | -- |
| 09/29/23 03:00 | O3 | 1 hr | 0.047 | ppm | 0.090 | -- | -- |
| 09/29/23 04:00 | O3 | 1 hr | 0.044 | ppm | 0.090 | -- | -- |
| 09/29/23 05:00 | O3 | 1 hr | 0.043 | ppm | 0.090 | -- | -- |
| 09/29/23 06:00 | O3 | 1 hr | 0.040 | ppm | 0.090 | -- | -- |
| 09/29/23 07:00 | O3 | 1 hr | 0.035 | ppm | 0.090 | -- | -- |
| 09/29/23 08:00 | O3 | 1 hr | 0.030 | ppm | 0.090 | -- | -- |
| 09/29/23 09:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 09/29/23 10:00 | O3 | 1 hr | 0.038 | ppm | 0.090 | -- | -- |
| 09/29/23 11:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 09/29/23 12:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 09/29/23 13:00 | O3 | 1 hr | 0.043 | ppm | 0.090 | -- | -- |
| 09/29/23 14:00 | O3 | 1 hr | 0.039 | ppm | 0.090 | -- | -- |
| 09/29/23 15:00 | O3 | 1 hr | 0.040 | ppm | 0.090 | -- | -- |
| 09/29/23 16:00 | O3 | 1 hr | 0.041 | ppm | 0.090 | -- | -- |
| 09/29/23 17:00 | O3 | 1 hr | 0.038 | ppm | 0.090 | -- | -- |
| 09/29/23 18:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 09/29/23 19:00 | O3 | 1 hr | 0.030 | ppm | 0.090 | -- | -- |
| 09/29/23 20:00 | O3 | 1 hr | 0.028 | ppm | 0.090 | -- | -- |
| 09/29/23 21:00 | O3 | 1 hr | 0.040 | ppm | 0.090 | -- | -- |
| 09/29/23 22:00 | O3 | 1 hr | 0.043 | ppm | 0.090 | -- | -- |
| 09/29/23 23:00 | O3 | 1 hr | 0.039 | ppm | 0.090 | -- | -- |
| 09/30/23 00:00 | O3 | 1 hr | 0.036 | ppm | 0.090 | -- | -- |
| 09/30/23 01:00 | O3 | 1 hr | 0.037 | ppm | 0.090 | -- | -- |
| 09/30/23 02:00 | O3 | 1 hr | -- | ppm | 0.090 | -- | -- |
| 09/30/23 03:00 | O3 | 1 hr | 0.031 | ppm | 0.090 | -- | -- |
| 09/30/23 04:00 | O3 | 1 hr | 0.022 | ppm | 0.090 | -- | -- |
| 09/30/23 05:00 | O3 | 1 hr | 0.027 | ppm | 0.090 | -- | -- |
| 09/30/23 06:00 | O3 | 1 hr | 0.029 | ppm | 0.090 | -- | -- |
| 09/30/23 07:00 | O3 | 1 hr | 0.029 | ppm | 0.090 | -- | -- |
| 09/30/23 08:00 | O3 | 1 hr | 0.029 | ppm | 0.090 | -- | -- |
| 09/30/23 09:00 | O3 | 1 hr | 0.032 | ppm | 0.090 | -- | -- |
| 09/30/23 10:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 09/30/23 11:00 | O3 | 1 hr | 0.028 | ppm | 0.090 | -- | -- |
| 09/30/23 12:00 | O3 | 1 hr | 0.028 | ppm | 0.090 | -- | -- |
| 09/30/23 13:00 | O3 | 1 hr | 0.026 | ppm | 0.090 | -- | -- |
| 09/30/23 14:00 | O3 | 1 hr | 0.028 | ppm | 0.090 | -- | -- |
| 09/30/23 15:00 | O3 | 1 hr | 0.030 | ppm | 0.090 | -- | -- |
| 09/30/23 16:00 | O3 | 1 hr | 0.032 | ppm | 0.090 | -- | -- |
| 09/30/23 17:00 | O3 | 1 hr | 0.030 | ppm | 0.090 | -- | -- |
| 09/30/23 18:00 | O3 | 1 hr | 0.031 | ppm | 0.090 | -- | -- |
| 09/30/23 19:00 | O3 | 1 hr | 0.030 | ppm | 0.090 | -- | -- |
| 09/30/23 20:00 | O3 | 1 hr | 0.030 | ppm | 0.090 | -- | -- |
| 09/30/23 21:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 09/30/23 22:00 | O3 | 1 hr | 0.030 | ppm | 0.090 | -- | -- |
| 09/30/23 23:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 10/01/23 00:00 | O3 | 1 hr | 0.034 | ppm | 0.090 | -- | -- |
| 10/01/23 01:00 | O3 | 1 hr | 0.035 | ppm | 0.090 | -- | -- |
| 10/01/23 02:00 | O3 | 1 hr | -- | ppm | 0.090 | -- | -- |
| 10/01/23 03:00 | O3 | 1 hr | 0.028 | ppm | 0.090 | -- | -- |
| 10/01/23 04:00 | O3 | 1 hr | 0.024 | ppm | 0.090 | -- | -- |
| 10/01/23 05:00 | O3 | 1 hr | 0.031 | ppm | 0.090 | -- | -- |
| 10/01/23 06:00 | O3 | 1 hr | 0.028 | ppm | 0.090 | -- | -- |
| 10/01/23 07:00 | O3 | 1 hr | 0.034 | ppm | 0.090 | -- | -- |
| 10/01/23 08:00 | O3 | 1 hr | 0.031 | ppm | 0.090 | -- | -- |
| 10/01/23 09:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 10/01/23 10:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 10/01/23 11:00 | O3 | 1 hr | 0.037 | ppm | 0.090 | -- | -- |
| 10/01/23 12:00 | O3 | 1 hr | 0.037 | ppm | 0.090 | -- | -- |
| 10/01/23 13:00 | O3 | 1 hr | 0.034 | ppm | 0.090 | -- | -- |
| 10/01/23 14:00 | O3 | 1 hr | 0.034 | ppm | 0.090 | -- | -- |
| 10/01/23 15:00 | O3 | 1 hr | 0.036 | ppm | 0.090 | -- | -- |
| 10/01/23 16:00 | O3 | 1 hr | 0.036 | ppm | 0.090 | -- | -- |
| 10/01/23 17:00 | O3 | 1 hr | 0.032 | ppm | 0.090 | -- | -- |
| 10/01/23 18:00 | O3 | 1 hr | 0.032 | ppm | 0.090 | -- | -- |
| 10/01/23 19:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 10/01/23 20:00 | O3 | 1 hr | 0.031 | ppm | 0.090 | -- | -- |
| 10/01/23 21:00 | O3 | 1 hr | 0.029 | ppm | 0.090 | -- | -- |
| 10/01/23 22:00 | O3 | 1 hr | 0.031 | ppm | 0.090 | -- | -- |
| 10/01/23 23:00 | O3 | 1 hr | 0.027 | ppm | 0.090 | -- | -- |
| 10/02/23 00:00 | O3 | 1 hr | 0.016 | ppm | 0.090 | -- | -- |
| 10/02/23 01:00 | O3 | 1 hr | 0.015 | ppm | 0.090 | -- | -- |
| 10/02/23 02:00 | O3 | 1 hr | -- | ppm | 0.090 | -- | -- |
| 10/02/23 03:00 | O3 | 1 hr | 0.005 | ppm | 0.090 | -- | -- |
| 10/02/23 04:00 | O3 | 1 hr | 0.006 | ppm | 0.090 | -- | -- |
| 10/02/23 05:00 | O3 | 1 hr | 0.002 | ppm | 0.090 | -- | -- |
| 10/02/23 06:00 | O3 | 1 hr | 0.002 | ppm | 0.090 | -- | -- |
| 10/02/23 07:00 | O3 | 1 hr | 0.005 | ppm | 0.090 | -- | -- |
| 10/02/23 08:00 | O3 | 1 hr | 0.014 | ppm | 0.090 | -- | -- |
| 10/02/23 09:00 | O3 | 1 hr | 0.020 | ppm | 0.090 | -- | -- |
| 10/02/23 10:00 | O3 | 1 hr | 0.023 | ppm | 0.090 | -- | -- |
| 10/02/23 11:00 | O3 | 1 hr | 0.030 | ppm | 0.090 | -- | -- |
| 10/02/23 12:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 10/02/23 13:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 10/02/23 14:00 | O3 | 1 hr | 0.036 | ppm | 0.090 | -- | -- |
| 10/02/23 15:00 | O3 | 1 hr | 0.031 | ppm | 0.090 | -- | -- |
| 10/02/23 16:00 | O3 | 1 hr | 0.033 | ppm | 0.090 | -- | -- |
| 10/02/23 17:00 | O3 | 1 hr | 0.032 | ppm | 0.090 | -- | -- |
| 10/02/23 18:00 | O3 | 1 hr | 0.027 | ppm | 0.090 | -- | -- |
| 10/02/23 19:00 | O3 | 1 hr | 0.027 | ppm | 0.090 | -- | -- |
| 10/02/23 20:00 | O3 | 1 hr | 0.026 | ppm | 0.090 | -- | -- |
| 10/02/23 21:00 | O3 | 1 hr | 0.028 | ppm | 0.090 | -- | -- |