Chromium (total)
China Lake Naval Air Weapons Station
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 6 | 0 | ND |
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 |
|---|---|---|
| 2020-09-16 | CA1510703_002_002-202009160820 | ND |
| 2020-09-16 | CA1510703_017_017-202009161000 | ND |
| 2020-09-16 | CA1510703_013_013-202009160900 | ND |
| 2020-09-16 | CA1510703_004_004-202009160845 | ND |
| 2021-06-15 | CA1510703_015_015-202106150945 | ND |
| 2022-06-28 | CA1510703_043_043-202206280900 | ND |
| 2023-11-07 | CA1510703_004_004-202311070717 | ND |
| 2023-11-07 | CA1510703_002_002-202311070901 | ND |
| 2023-11-07 | CA1510703_015_015-202311070807 | ND |
| 2023-11-07 | CA1510703_017_017-202311070732 | ND |
| 2023-11-07 | CA1510703_013_013-202311070824 | ND |
| 2023-11-07 | CA1510703_043_043-202311070917 | ND |