Chromium (total)
City of Beloit
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.
38
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.747 ppb | 24 | 19 | ND - 5.88 ppb |
| 2014 | 0.347 ppb | 7 | 3 | ND - 1.60 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | 0.797 ppb | 7 | 3 | ND - 2.80 ppb |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2013-03-11 | 709326-8591 | ND |
| 2013-03-11 | 709312-8591 | 0.926 ppb |
| 2013-03-11 | 709316-8591 | 0.580 ppb |
| 2013-03-11 | 709322-8591 | 0.780 ppb |
| 2013-03-11 | 709314-8591 | 0.554 ppb |
| 2013-03-11 | 709320-8591 | 0.579 ppb |
| 2013-03-11 | 709324-8591 | 0.791 ppb |
| 2013-03-11 | 709318-8591 | 0.709 ppb |
| 2013-03-11 | 709310-8591 | 0.389 ppb |
| 2013-03-11 | 709336-8591 | ND |
| 2013-05-16 | 719953-9000 | 5.88 ppb |
| 2013-05-16 | 719959-9000 | 0.519 ppb |
| 2013-09-16 | 745331-9811 | 0.542 ppb |
| 2013-09-16 | 745329-9757 | 0.533 ppb |
| 2013-09-16 | 745333-9811 | ND |
| 2013-09-16 | 745335-9811 | 0.592 ppb |
| 2013-09-16 | 745327-9757 | 0.995 ppb |
| 2013-09-16 | 745345-9811 | 0.633 ppb |
| 2013-09-16 | 745337-9811 | 0.742 ppb |
| 2013-09-16 | 745347-9811 | 0.630 ppb |
| 2013-09-16 | 745339-9811 | 0.782 ppb |
| 2013-09-16 | 745343-9811 | 0.764 ppb |
| 2013-11-04 | 756576-10226 | ND |
| 2013-11-04 | 756582-10226 | ND |
| 2014-02-26 | 772247 | 1.60 ppb |
| 2014-02-26 | 772255 | 0.460 ppb |
| 2014-02-26 | 772257 | 0.370 ppb |
| 2014-02-26 | 772251 | ND |
| 2014-02-26 | 772249 | ND |
| 2014-02-26 | 772244 | ND |
| 2014-02-26 | 772241 | ND |
| 2017-02-28 | 975353 | 2.80 ppb |
| 2017-02-28 | 975349 | 2.20 ppb |
| 2017-02-28 | 975342 | 0.580 ppb |
| 2017-02-28 | 975345 | ND |
| 2017-02-28 | 975332 | ND |
| 2017-02-28 | 975335 | ND |
| 2017-02-28 | 975339 | ND |