Chromium (total)
Sun Prairie Utilities
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.
39
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 | 0.632 ppb | 12 | 12 | 0.250 ppb - 0.907 ppb |
| 2014 | 0.478 ppb | 20 | 15 | ND - 0.943 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | 0.259 ppb | 7 | 4 | ND - 0.560 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 |
|---|---|---|
| 2013-10-31 | 756110-10226 | 0.657 ppb |
| 2013-11-07 | 757678-10297 | 0.907 ppb |
| 2013-11-07 | 757676-10297 | 0.707 ppb |
| 2013-11-07 | 757664-10297 | 0.578 ppb |
| 2013-11-07 | 757692-10297 | 0.722 ppb |
| 2013-11-07 | 757684-10297 | 0.779 ppb |
| 2013-11-07 | 757668-10297 | 0.517 ppb |
| 2013-11-07 | 757680-10297 | 0.713 ppb |
| 2013-11-07 | 757672-10297 | 0.593 ppb |
| 2013-11-07 | 757674-10297 | 0.904 ppb |
| 2013-11-07 | 757682-10297 | 0.256 ppb |
| 2013-11-07 | 757662-10297 | 0.250 ppb |
| 2014-03-18 | 775338 | ND |
| 2014-03-18 | 775327 | ND |
| 2014-03-18 | 775335 | ND |
| 2014-03-18 | 775341 | ND |
| 2014-03-18 | 775329 | ND |
| 2014-03-18 | 775332 | 0.390 ppb |
| 2014-03-18 | 775283 | 0.240 ppb |
| 2014-05-06 | 784659-11351 | 0.943 ppb |
| 2014-05-06 | 784669-11351 | 0.884 ppb |
| 2014-05-06 | 784671-11351 | 0.701 ppb |
| 2014-05-06 | 784667-11362 | 0.616 ppb |
| 2014-05-06 | 784663-11351 | 0.647 ppb |
| 2014-05-06 | 784681-11351 | 0.881 ppb |
| 2014-05-06 | 784683-11351 | 0.292 ppb |
| 2014-05-06 | 784679-11351 | 0.900 ppb |
| 2014-05-06 | 784673-11351 | 0.518 ppb |
| 2014-05-06 | 784677-11351 | 0.782 ppb |
| 2014-05-06 | 784675-11351 | 0.813 ppb |
| 2014-05-06 | 784665-11351 | 0.264 ppb |
| 2014-05-22 | 792303-11563 | 0.683 ppb |
| 2017-04-26 | 985414 | ND |
| 2017-04-26 | 985420 | ND |
| 2017-04-26 | 985427 | ND |
| 2017-04-26 | 985407 | 0.330 ppb |
| 2017-04-26 | 985416 | 0.380 ppb |
| 2017-04-26 | 985424 | 0.540 ppb |
| 2017-04-26 | 985411 | 0.560 ppb |