Chromium (hexavalent)
Greendale Waterworks
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).
16
Samples
0
Samples exceeding legal limit (MCL)
16
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.185 ppb | 8 | 8 | 0.159 ppb - 0.202 ppb |
| 2015 | 0.186 ppb | 8 | 8 | 0.143 ppb - 0.210 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 |
|---|---|---|
| 2014-08-05 | 808560-12024 | 0.202 ppb |
| 2014-08-05 | 808556-12024 | 0.190 ppb |
| 2014-08-05 | 808554-12015 | 0.191 ppb |
| 2014-08-05 | 808558-12024 | 0.200 ppb |
| 2014-11-12 | 831389-12831 | 0.174 ppb |
| 2014-11-12 | 831391-12831 | 0.159 ppb |
| 2014-11-12 | 831395-12831 | 0.179 ppb |
| 2014-11-12 | 831393-12831 | 0.181 ppb |
| 2015-02-17 | 844263-13461 | 0.143 ppb |
| 2015-02-17 | 844261-13461 | 0.208 ppb |
| 2015-02-17 | 844259-13461 | 0.202 ppb |
| 2015-02-17 | 844257-13461 | 0.210 ppb |
| 2015-05-14 | 860004-14100 | 0.181 ppb |
| 2015-05-14 | 860006-14100 | 0.171 ppb |
| 2015-05-14 | 860008-14100 | 0.188 ppb |
| 2015-05-14 | 860010-14100 | 0.186 ppb |