Chromium (total)
Water Works District #1 of Vermilion
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 | 2 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2019-06-10 | B1902450-001 | ND |
| 2019-06-10 | B1902450-001 | ND |
| 2020-06-10 | B2002812-001 | ND |
| 2020-06-10 | B2002812-002 | ND |
| 2020-06-10 | B2002812-003 | ND |
| 2020-06-10 | B2002812-004 | ND |
| 2020-10-05 | B2005237-001 | ND |
| 2020-10-05 | B2005237-002 | ND |
| 2022-07-25 | B2203466-001 | ND |
| 2023-03-27 | B2301337-001 | ND |
| 2023-03-27 | B2301337-002 | ND |
| 2023-03-27 | B2301338-001 | ND |
| 2023-03-27 | B2301338-002 | ND |
| 2023-07-10 | B2302775-001 | ND |
| 2023-07-10 | B2302775-002 | ND |