Chromium (hexavalent)
Widefield WSD
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).
49
Samples
0
Samples exceeding legal limit (MCL)
36
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.129 ppb | 16 | 10 | ND - 0.550 ppb |
| 2014 | 0.176 ppb | 33 | 26 | ND - 0.620 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|
| 2013-11-06 | 0.0890 ppb |
| 2013-11-06 | 0.110 ppb |
| 2013-11-12 | 0.360 ppb |
| 2013-11-12 | 0.300 ppb |
| 2013-11-12 | 0.160 ppb |
| 2013-11-13 | ND |
| 2013-11-13 | 0.240 ppb |
| 2013-11-13 | ND |
| 2013-11-13 | ND |
| 2013-11-19 | ND |
| 2013-11-20 | 0.550 ppb |
| 2013-12-17 | ND |
| 2013-12-17 | 0.120 ppb |
| 2013-12-17 | 0.0450 ppb |
| 2013-12-17 | ND |
| 2013-12-17 | 0.0930 ppb |
| 2014-02-19 | 0.160 ppb |
| 2014-02-19 | 0.0370 ppb |
| 2014-02-19 | ND |
| 2014-02-19 | ND |
| 2014-02-19 | 0.160 ppb |
| 2014-02-19 | ND |
| 2014-02-19 | ND |
| 2014-02-19 | ND |
| 2014-02-24 | ND |
| 2014-05-13 | 0.120 ppb |
| 2014-05-13 | 0.620 ppb |
| 2014-05-13 | 0.110 ppb |
| 2014-05-13 | 0.110 ppb |
| 2014-05-13 | 0.110 ppb |
| 2014-05-13 | 0.450 ppb |
| 2014-05-13 | 0.130 ppb |
| 2014-05-13 | 0.440 ppb |
| 2014-05-14 | 0.230 ppb |
| 2014-05-14 | 0.240 ppb |
| 2014-05-14 | 0.320 ppb |
| 2014-05-19 | 0.110 ppb |
| 2014-05-19 | 0.140 ppb |
| 2014-05-19 | 0.480 ppb |
| 2014-05-27 | ND |
| 2014-08-11 | 0.110 ppb |
| 2014-08-11 | 0.400 ppb |
| 2014-08-11 | 0.0900 ppb |
| 2014-08-11 | 0.390 ppb |
| 2014-08-11 | 0.1000 ppb |
| 2014-08-11 | 0.0320 ppb |
| 2014-08-11 | 0.210 ppb |
| 2014-08-11 | 0.1000 ppb |
| 2014-08-11 | 0.410 ppb |