Chromium (total)
Vixen 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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 4 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 1 | 0 | ND |
| 2022 | 3.58 ppb | 5 | 3 | ND - 7.50 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 |
|---|---|---|
| 2019-03-26 | 35457369001 | ND |
| 2019-03-26 | 35457369002 | ND |
| 2019-03-26 | 35457369001 | ND |
| 2019-03-26 | 35457369002 | ND |
| 2021-06-09 | B2102656-001 | ND |
| 2022-02-21 | B2200772-001 | 5.30 ppb |
| 2022-02-21 | B2200772-002 | 5.10 ppb |
| 2022-02-21 | B2200772-003 | ND |
| 2022-05-03 | B2202118-001 | 7.50 ppb |
| 2022-09-13 | B2204468-001 | ND |