Chromium (total)
Mansfield 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 | 4 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 7 | 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 |
|---|---|---|
| 2018-04-03 | 35384985001 | ND |
| 2018-04-03 | 35384985001 | ND |
| 2018-04-19 | 35387645001 | ND |
| 2018-04-19 | 35387645001 | ND |
| 2019-03-13 | 35454725001 | ND |
| 2019-03-13 | 35454725001 | ND |
| 2020-02-03 | B2000555-001 | ND |
| 2021-03-03 | B2101021-001 | ND |
| 2021-03-31 | B2101620-001 | ND |
| 2021-08-18 | B2104128-001 | ND |
| 2021-12-09 | B2106616-001 | ND |
| 2022-02-22 | B2200830-001 | ND |
| 2022-05-19 | B2202493-001 | ND |
| 2022-11-09 | B2205453-001 | ND |
| 2023-02-07 | B2300548-001 | ND |
| 2023-06-07 | B2302408-001 | ND |
| 2023-08-21 | B2303429-001 | ND |
| 2023-10-09 | B2304510-001 | ND |
| 2023-10-09 | B2304510-002 | ND |
| 2023-10-09 | B2304510-003 | ND |
| 2023-11-20 | B2305057-001 | ND |