Chromium (total)
Vivian Water System
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 | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2018-01-08 | 35367519001 | ND |
| 2018-01-08 | 35367519001 | ND |
| 2019-02-18 | 35449625001 | ND |
| 2019-02-18 | 35449625001 | ND |
| 2020-02-11 | B2000665-001 | ND |
| 2020-08-04 | B2003956-001 | ND |
| 2021-01-05 | B2100045-001 | ND |
| 2022-02-14 | B2200616-001 | ND |
| 2023-01-30 | B2300430-001 | ND |
| 2023-08-15 | B2303696-001 | ND |
| 2023-12-12 | B2305252-001 | ND |