Chromium (total)
Solano Irrigation District - Pleasant Hills Ranch
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 | ND | 6 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-05-10 | CA4810025_004_005-201805101000 | ND |
| 2018-05-10 | CA4810025_004_004-201805101015 | ND |
| 2018-08-23 | CA4810025_004_005-201808230945 | ND |
| 2018-08-23 | CA4810025_004_004-201808230920 | ND |
| 2018-11-15 | CA4810025_004_005-201811151110 | ND |
| 2018-11-15 | CA4810025_004_004-201811151120 | ND |
| 2019-03-12 | CA4810025_002_002-201903120905 | ND |
| 2019-03-18 | CA4810025_004_005-201903181000 | ND |
| 2019-03-18 | CA4810025_001_001-201903181000 | ND |
| 2020-03-10 | CA4810025_002_002-202003100815 | ND |
| 2020-03-17 | CA4810025_004_005-202003170905 | ND |
| 2021-03-23 | CA4810025_004_005-202103231040 | ND |
| 2022-03-15 | CA4810025_004_005-202203151100 | ND |
| 2022-03-15 | CA4810025_002_002-202203150737 | ND |
| 2023-03-23 | CA4810025_004_005-202303230940 | ND |