Chromium (hexavalent)
Crystal Clear WSC
Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).
29
Samples
0
Samples exceeding legal limit (MCL)
28
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.0963 ppb | 12 | 12 | 0.0318 ppb - 0.297 ppb |
| 2015 | 0.0658 ppb | 17 | 16 | ND - 0.114 ppb |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 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
EWG Health Guideline 0.02 ppb
The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-10-28 | 4J31012-05 | 0.0318 ppb |
| 2014-10-28 | 4J31012-02 | 0.118 ppb |
| 2014-10-28 | 4J31012-07 | 0.0425 ppb |
| 2014-10-28 | 4J31012-08 | 0.0357 ppb |
| 2014-10-28 | 4J31012-06 | 0.0992 ppb |
| 2014-10-28 | 4J31012-09 | 0.111 ppb |
| 2014-10-28 | 4J31012-10 | 0.117 ppb |
| 2014-10-28 | 4J31012-12 | 0.104 ppb |
| 2014-10-28 | 4J31012-11 | 0.0809 ppb |
| 2014-10-28 | 4J31012-01 | 0.297 ppb |
| 2014-10-28 | 4J31012-04 | 0.0417 ppb |
| 2014-10-28 | 4J31012-03 | 0.0766 ppb |
| 2015-01-26 | 5A30002-05 | 0.0847 ppb |
| 2015-01-26 | 5A30002-06 | 0.0871 ppb |
| 2015-01-26 | 5A30002-01 | 0.0872 ppb |
| 2015-01-26 | 5A30002-02 | 0.114 ppb |
| 2015-04-22 | 5D29017-04 | 0.0487 ppb |
| 2015-04-22 | 5D29017-08 | 0.0657 ppb |
| 2015-04-22 | 5D29017-07 | 0.0423 ppb |
| 2015-04-22 | 5D29017-03 | 0.0768 ppb |
| 2015-04-22 | 5D29017-02 | 0.0770 ppb |
| 2015-04-22 | 5D29017-01 | 0.0901 ppb |
| 2015-04-22 | 5D29017-10 | 0.0727 ppb |
| 2015-04-22 | 5D29017-09 | 0.0735 ppb |
| 2015-04-22 | 5D29017-05 | ND |
| 2015-08-25 | 5H28018-04 | 0.0487 ppb |
| 2015-08-25 | 5H28018-05 | 0.0808 ppb |
| 2015-08-25 | 5H28018-01 | 0.0361 ppb |
| 2015-08-25 | 5H28018-02 | 0.0337 ppb |