Chromium (total)
Lincoln Psd
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 | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | 0.700 ppb | 3 | 1 | ND - 2.10 ppb |
| 2021 | 3.80 ppb | 1 | 1 | 3.80 ppb |
| 2022 | 2.30 ppb | 1 | 1 | 2.30 ppb |
| 2023 | 4.50 ppb | 1 | 1 | 4.50 ppb |
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 |
|---|---|---|
| 2018-12-11 | 18121167-03A | ND |
| 2019-05-13 | 19051755-03A | ND |
| 2020-02-24 | 7318905002 | ND |
| 2020-02-24 | 7318905002 | ND |
| 2020-11-09 | 7349927006 | 2.10 ppb |
| 2021-10-18 | 7393923003 | 3.80 ppb |
| 2022-10-18 | 30530738003 | 2.30 ppb |
| 2023-11-29 | 30642794004 | 4.50 ppb |