Chromium (total)
Travis County Municipal Utility District 4
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 | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-02-15 | AE13979 | ND |
| 2018-08-13 | AE36529 | ND |
| 2019-02-14 | AE54531 | ND |
| 2019-02-14 | AE54532 | ND |
| 2020-03-03 | AF00801 | ND |
| 2020-07-23 | AF20311 | ND |
| 2021-01-25 | AF40610 | ND |
| 2021-01-25 | AF40615 | ND |
| 2022-02-10 | AF84174 | ND |
| 2022-04-28 | AF94756 | ND |
| 2023-02-14 | AG28752 | ND |
| 2023-02-14 | AG28753 | ND |