Chromium (total)
Janesville Water Utility
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.
20
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 | 0.468 ppb | 12 | 11 | ND - 0.623 ppb |
| 2014 | 0.332 ppb | 5 | 4 | ND - 0.520 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | 0.113 ppb | 3 | 1 | ND - 0.340 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 |
|---|---|---|
| 2013-02-25 | 706591-8458 | 0.518 ppb |
| 2013-02-25 | 706595-8458 | 0.515 ppb |
| 2013-02-25 | 706593-8458 | 0.299 ppb |
| 2013-04-17 | 715047-9089 | ND |
| 2013-04-17 | 715050-9089 | 0.573 ppb |
| 2013-04-17 | 715054-9089 | 0.622 ppb |
| 2013-08-14 | 737949-9543 | 0.404 ppb |
| 2013-08-14 | 737951-9543 | 0.536 ppb |
| 2013-08-14 | 737955-9543 | 0.412 ppb |
| 2013-08-14 | 737957-9543 | 0.623 ppb |
| 2013-08-14 | 737959-9543 | 0.509 ppb |
| 2013-08-14 | 737953-9543 | 0.603 ppb |
| 2014-02-25 | 771924 | 0.410 ppb |
| 2014-02-25 | 771934 | 0.370 ppb |
| 2014-02-25 | 771930 | 0.360 ppb |
| 2014-02-26 | 772238 | 0.520 ppb |
| 2014-02-26 | 772231 | ND |
| 2017-04-11 | 982423 | 0.340 ppb |
| 2017-04-11 | 982415 | ND |
| 2017-04-11 | 982420 | ND |