Chromium (hexavalent)
Centerville Osterville Marstons Mills WD
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).
31
Samples
0
Samples exceeding legal limit (MCL)
26
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.152 ppb | 31 | 26 | ND - 0.560 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 |
|---|---|
| 2014-05-05 | 0.0420 ppb |
| 2014-05-05 | 0.170 ppb |
| 2014-05-05 | 0.110 ppb |
| 2014-05-05 | ND |
| 2014-05-05 | 0.0310 ppb |
| 2014-05-07 | 0.560 ppb |
| 2014-05-07 | 0.120 ppb |
| 2014-05-07 | 0.210 ppb |
| 2014-05-12 | 0.260 ppb |
| 2014-05-12 | 0.230 ppb |
| 2014-05-12 | 0.220 ppb |
| 2014-05-12 | 0.260 ppb |
| 2014-05-12 | 0.0960 ppb |
| 2014-05-29 | 0.0730 ppb |
| 2014-05-29 | 0.250 ppb |
| 2014-05-29 | ND |
| 2014-11-17 | 0.0920 ppb |
| 2014-11-19 | ND |
| 2014-11-19 | ND |
| 2014-11-19 | ND |
| 2014-11-19 | 0.0480 ppb |
| 2014-11-19 | 0.140 ppb |
| 2014-11-19 | 0.0790 ppb |
| 2014-11-20 | 0.360 ppb |
| 2014-11-20 | 0.110 ppb |
| 2014-11-20 | 0.200 ppb |
| 2014-11-20 | 0.220 ppb |
| 2014-11-20 | 0.160 ppb |
| 2014-11-20 | 0.230 ppb |
| 2014-11-20 | 0.250 ppb |
| 2014-12-22 | 0.200 ppb |