| Date | Value |
|---|---|
| Jun 4, 2023 21:49 | 19 ppm |
| May 19, 2023 16:13 | 17.5 ppm |
| May 3, 2023 01:11 | 0.40 ppm |
| Apr 23, 2023 23:15 | 1.8 ppm |
| Apr 15, 2023 00:12 | 3.9 ppm |
| Apr 8, 2023 16:23 | 8.5 ppm |
| Apr 2, 2023 00:23 | 14 ppm |
| Mar 28, 2023 01:03 | 12.1 ppm |
| Mar 25, 2023 17:47 | 10.7 ppm |
| Mar 19, 2023 00:14 | 20 ppm |
| Mar 7, 2023 02:00 | 20 ppm |
| Feb 23, 2023 02:35 | 5 ppm |