Chromium (hexavalent)
Dtma Main System
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).
40
Samples
0
Samples exceeding legal limit (MCL)
37
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.172 ppb | 40 | 37 | ND - 0.676 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 | Lab ID | Result |
|---|---|---|
| 2014-02-18 | 304805P | 0.676 ppb |
| 2014-02-18 | 304807P | ND |
| 2014-02-18 | 104905P | 0.0300 ppb |
| 2014-02-18 | 304803P | 0.0370 ppb |
| 2014-02-18 | 104906P | 0.0410 ppb |
| 2014-02-18 | 304804P | 0.529 ppb |
| 2014-02-18 | 104900P | 0.437 ppb |
| 2014-02-18 | 104908P | ND |
| 2014-02-18 | 304808P | 0.104 ppb |
| 2014-02-19 | 104901P | 0.116 ppb |
| 2014-02-19 | 104903P | 0.360 ppb |
| 2014-02-19 | 304806P | 0.210 ppb |
| 2014-02-19 | 104899P | 0.131 ppb |
| 2014-02-19 | 104912P | 0.101 ppb |
| 2014-02-19 | 104910P | 0.0820 ppb |
| 2014-02-19 | 104909P | 0.0460 ppb |
| 2014-02-19 | 104904P | 0.0470 ppb |
| 2014-02-19 | 104911P | 0.0810 ppb |
| 2014-03-17 | 106463R | 0.0640 ppb |
| 2014-03-17 | 106462R | 0.177 ppb |
| 2014-05-21 | 106963P | 0.170 ppb |
| 2014-05-21 | 307040P | 0.0600 ppb |
| 2014-08-18 | 108932P | 0.0600 ppb |
| 2014-08-18 | 108930P | ND |
| 2014-08-18 | 108937P | 0.540 ppb |
| 2014-08-18 | 108935P | 0.490 ppb |
| 2014-08-18 | 308925P | 0.400 ppb |
| 2014-08-18 | 308922P | 0.0600 ppb |
| 2014-08-18 | 108938P | 0.130 ppb |
| 2014-08-19 | 108936P | 0.170 ppb |
| 2014-08-19 | 108928P | 0.140 ppb |
| 2014-08-19 | 308924P | 0.0600 ppb |
| 2014-08-19 | 108929P | 0.440 ppb |
| 2014-08-19 | 108934P | 0.0600 ppb |
| 2014-08-19 | 108927P | 0.0900 ppb |
| 2014-08-19 | 108920P | 0.120 ppb |
| 2014-09-08 | 109304R | 0.300 ppb |
| 2014-09-29 | 109553R | 0.117 ppb |
| 2014-11-18 | 309769P | 0.0580 ppb |
| 2014-11-24 | 109694F | 0.150 ppb |