Chromium (total)
Correctional Training Facility - Soledad
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 | 5.00 ppb | 1 | 1 | 5.00 ppb |
| 2019 | 7.00 ppb | 1 | 1 | 7.00 ppb |
| 2020 | 5.00 ppb | 1 | 1 | 5.00 ppb |
| 2021 | 4.50 ppb | 1 | 1 | 4.50 ppb |
| 2022 | 4.00 ppb | 1 | 1 | 4.00 ppb |
| 2023 | 4.30 ppb | 1 | 1 | 4.30 ppb |
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 |
|---|---|---|
| 2018-08-07 | CA2710850_005_005-201808070930 | 5.00 ppb |
| 2019-05-07 | CA2710850_006_006-201905071000 | 7.00 ppb |
| 2020-09-07 | CA2710850_007_007-202009071520 | 5.00 ppb |
| 2021-08-10 | CA2710850_005_005-202108101010 | 4.50 ppb |
| 2022-08-31 | CA2710850_006_006-202208311015 | 4.00 ppb |
| 2023-12-27 | CA2710850_007_007-202312270815 | 4.30 ppb |