Chromium (hexavalent)
Chatsworth
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).
20
Samples
0
Samples exceeding legal limit (MCL)
17
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | 0.164 ppb | 20 | 17 | ND - 0.341 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 |
|---|---|---|
| 2015-03-04 | 846761-13570 | 0.125 ppb |
| 2015-03-10 | 847614-13599 | 0.289 ppb |
| 2015-03-10 | 847618-13599 | ND |
| 2015-03-10 | 847616-13599 | 0.295 ppb |
| 2015-03-16 | 848696-13618 | ND |
| 2015-06-08 | 864199-14233 | 0.142 ppb |
| 2015-06-09 | 864573-14239 | 0.0390 ppb |
| 2015-06-15 | 865391-14309 | 0.322 ppb |
| 2015-06-15 | 865395-14309 | 0.0730 ppb |
| 2015-06-29 | 868344-14409 | 0.338 ppb |
| 2015-09-01 | 880259-14876 | 0.172 ppb |
| 2015-09-08 | 881647-14885 | 0.0330 ppb |
| 2015-09-08 | 881643-14885 | 0.341 ppb |
| 2015-09-08 | 881645-14885 | 0.0380 ppb |
| 2015-09-09 | 882101-14885 | 0.304 ppb |
| 2015-12-07 | 897218-15521 | ND |
| 2015-12-08 | 897426-15521 | 0.153 ppb |
| 2015-12-15 | 898366-15541 | 0.0520 ppb |
| 2015-12-15 | 898364-15541 | 0.294 ppb |
| 2015-12-15 | 898362-15541 | 0.269 ppb |