Chromium (total)
Huttig Waterworks
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 | 5 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 7 | 0 | ND |
| 2022 | 35.8 ppb | 9 | 8 | ND - 73.9 ppb |
| 2023 | 45.8 ppb | 8 | 8 | 12.1 ppb - 73.8 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 |
|---|---|---|
| 2018-05-01 | Y181230005 | ND |
| 2018-10-29 | Y183050003 | ND |
| 2019-01-28 | Y190310042 | ND |
| 2019-05-01 | Y191220033 | ND |
| 2019-09-03 | Y192490002 | ND |
| 2019-10-15 | Y192900023 | ND |
| 2019-10-28 | Y193050040 | ND |
| 2020-02-24 | Y200580041 | ND |
| 2020-06-16 | Y201700052 | ND |
| 2020-08-31 | Y202470025 | ND |
| 2020-09-07 | Y202540039 | ND |
| 2020-11-30 | Y203380011 | ND |
| 2021-03-10 | Y210700039 | ND |
| 2021-05-19 | Y211400022 | ND |
| 2021-05-19 | Y211400061 | ND |
| 2021-08-30 | Y212450017 | ND |
| 2021-09-13 | Y212590012 | ND |
| 2021-11-17 | Y213230007 | ND |
| 2021-11-17 | Y213220014 | ND |
| 2022-03-02 | Y220620066 | ND |
| 2022-03-28 | Y220900004 | 39.3 ppb |
| 2022-05-23 | Y221460056 | 36.5 ppb |
| 2022-05-23 | Y221460044 | 45.1 ppb |
| 2022-07-26 | Y222090019 | 46.7 ppb |
| 2022-08-23 | Y222370018 | 73.9 ppb |
| 2022-08-23 | Y222370019 | 68.2 ppb |
| 2022-11-14 | Y223210019 | 7.40 ppb |
| 2022-11-14 | Y223210023 | 5.20 ppb |
| 2023-02-14 | Y230470068 | 73.8 ppb |
| 2023-02-14 | Y230470067 | 64.4 ppb |
| 2023-05-30 | Y231520014 | 48.6 ppb |
| 2023-05-30 | Y231520023 | 44.9 ppb |
| 2023-09-06 | Y232500070 | 32.8 ppb |
| 2023-09-06 | Y232500071 | 38.0 ppb |
| 2023-10-24 | Y232990020 | 12.1 ppb |
| 2023-10-24 | Y232990027 | 51.8 ppb |