Chromium (total)
Coachella Valley Water District: I.d. No. 8
Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 19.6 ppb | 5 | 5 | 12.0 ppb - 24.0 ppb |
| 2019 | 18.2 ppb | 6 | 6 | 13.0 ppb - 22.0 ppb |
| 2020 | 21.5 ppb | 2 | 2 | 20.0 ppb - 23.0 ppb |
| 2021 | 13.0 ppb | 1 | 1 | 13.0 ppb |
| 2022 | 17.0 ppb | 2 | 2 | 14.0 ppb - 20.0 ppb |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-14 | CA3310048_004_004-201803140910 | 22.0 ppb |
| 2018-06-27 | CA3310048_004_004-201806271113 | 20.0 ppb |
| 2018-07-02 | CA3310048_014_014-201807020931 | 12.0 ppb |
| 2018-07-18 | CA3310048_004_004-201807180813 | 24.0 ppb |
| 2018-12-11 | CA3310048_004_004-201812111330 | 20.0 ppb |
| 2019-03-06 | CA3310048_004_004-201903060925 | 17.0 ppb |
| 2019-05-14 | CA3310048_007_007-201905141030 | 13.0 ppb |
| 2019-05-15 | CA3310048_004_004-201905150800 | 18.0 ppb |
| 2019-06-21 | CA3310048_004_004-201906211235 | 17.0 ppb |
| 2019-09-17 | CA3310048_004_004-201909170920 | 22.0 ppb |
| 2019-12-19 | CA3310048_004_004-201912190820 | 22.0 ppb |
| 2020-03-17 | CA3310048_004_004-202003171237 | 20.0 ppb |
| 2020-06-23 | CA3310048_004_004-202006230920 | 23.0 ppb |
| 2021-12-02 | CA3310048_014_014-202112020749 | 13.0 ppb |
| 2022-01-06 | CA3310048_004_004-202201060940 | 20.0 ppb |
| 2022-02-16 | CA3310048_007_007-202202160735 | 14.0 ppb |