Chromium (hexavalent)
Firgrove Mutual Inc
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).
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.138 ppb | 12 | 11 | ND - 0.250 ppb |
| 2015 | 0.108 ppb | 18 | 15 | ND - 0.240 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 |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2014-11-17 | 201411190378AM | 0.0510 ppb |
| 2014-11-17 | 201411190526AM | 0.110 ppb |
| 2014-11-17 | 201411190528AM | 0.220 ppb |
| 2014-11-17 | 201411190452AM | 0.250 ppb |
| 2014-11-17 | 201411190437AM | 0.0330 ppb |
| 2014-11-17 | 201411190338AM | 0.120 ppb |
| 2014-11-17 | 201411190454AM | 0.200 ppb |
| 2014-11-17 | 201411190450AM | 0.120 ppb |
| 2014-11-17 | 201411190490AM | ND |
| 2014-11-17 | 201411190435AM | 0.110 ppb |
| 2014-11-17 | 201411190403AM | 0.200 ppb |
| 2014-12-12 | 201412160672AM | 0.240 ppb |
| 2015-02-13 | 201502160119AM | ND |
| 2015-02-13 | 201502160121AM | 0.0640 ppb |
| 2015-03-13 | 201503170797AM | 0.0790 ppb |
| 2015-05-18 | 201505200651AM | 0.0570 ppb |
| 2015-05-18 | 201505210080AM | 0.0850 ppb |
| 2015-05-18 | 201505200251AM | 0.0750 ppb |
| 2015-05-18 | 201505200247AM | 0.190 ppb |
| 2015-05-18 | 201505200407AM | 0.0810 ppb |
| 2015-05-18 | 201505200262AM | 0.200 ppb |
| 2015-05-18 | 201505210076AM | ND |
| 2015-05-18 | 201505200243AM | 0.220 ppb |
| 2015-05-18 | 201505200268AM | 0.0780 ppb |
| 2015-05-18 | 201505200274AM | 0.0520 ppb |
| 2015-05-18 | 201505200655AM | 0.240 ppb |
| 2015-05-18 | 201505200365AM | ND |
| 2015-05-18 | 201505210078AM | 0.240 ppb |
| 2015-08-21 | 201508250623AM | 0.170 ppb |
| 2015-08-21 | 201508250571AM | 0.110 ppb |