Chromium (hexavalent)
Holden Water Division, DPW
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).
19
Samples
0
Samples exceeding legal limit (MCL)
19
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.143 ppb | 10 | 10 | 0.0420 ppb - 0.660 ppb |
| 2015 | 0.108 ppb | 9 | 9 | 0.0380 ppb - 0.440 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 | Result |
|---|---|
| 2014-08-20 | 0.0660 ppb |
| 2014-08-20 | 0.0480 ppb |
| 2014-08-20 | 0.330 ppb |
| 2014-08-20 | 0.0460 ppb |
| 2014-08-20 | 0.0470 ppb |
| 2014-08-20 | 0.660 ppb |
| 2014-08-20 | 0.0520 ppb |
| 2014-08-20 | 0.0850 ppb |
| 2014-11-19 | 0.0570 ppb |
| 2014-11-19 | 0.0420 ppb |
| 2015-02-24 | 0.0530 ppb |
| 2015-02-25 | 0.0380 ppb |
| 2015-02-25 | 0.0450 ppb |
| 2015-02-25 | 0.0470 ppb |
| 2015-02-25 | 0.180 ppb |
| 2015-02-25 | 0.440 ppb |
| 2015-02-25 | 0.0400 ppb |
| 2015-05-27 | 0.0570 ppb |
| 2015-05-27 | 0.0760 ppb |