Chromium (hexavalent)
City of Auburn
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).
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.201 ppb | 22 | 22 | 0.0470 ppb - 0.460 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 |
---|---|---|
2014-03-12 | A4B1878-05A | 0.140 ppb |
2014-03-18 | A4C0166-05A | 0.0840 ppb |
2014-03-18 | A4C0166-01A | 0.160 ppb |
2014-03-18 | A4C0166-09A | 0.170 ppb |
2014-03-27 | A4C1504-02A | 0.160 ppb |
2014-03-27 | A4C1504-01A | 0.0640 ppb |
2014-03-27 | A4C1504-06A | 0.410 ppb |
2014-03-27 | A4C1504-05A | 0.460 ppb |
2014-04-01 | A4C1981-05A | 0.310 ppb |
2014-04-01 | A4C1981-01A | 0.280 ppb |
2014-06-11 | A4C2313-05A | 0.140 ppb |
2014-06-11 | A4C2313-01A | 0.0530 ppb |
2014-09-16 | A4I0632-11A | 0.190 ppb |
2014-09-16 | A4I0632-06A | 0.460 ppb |
2014-09-16 | A4I0632-01A | 0.0740 ppb |
2014-09-23 | A4I1297-11A | 0.180 ppb |
2014-09-23 | A4I1297-01A | 0.180 ppb |
2014-09-23 | A4I1297-06A | 0.0720 ppb |
2014-09-30 | A4I2084-06A | 0.300 ppb |
2014-09-30 | A4I2084-01A | 0.270 ppb |
2014-12-09 | A4L0057-06B | 0.220 ppb |
2014-12-09 | A4L0057-01B | 0.0470 ppb |