Chromium (hexavalent)
Medina Co/Northwest PWS
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).
12
Samples
0
Samples exceeding legal limit (MCL)
12
Samples exceeding
health guidelines
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.180 ppb | 9 | 9 | 0.0440 ppb - 0.350 ppb |
2015 | 0.0973 ppb | 3 | 3 | 0.0620 ppb - 0.130 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 |
---|---|---|
2014-05-19 | M14-16139-03 | 0.170 ppb |
2014-05-19 | M14-16139-05 | 0.200 ppb |
2014-05-19 | M14-16139-01 | 0.0860 ppb |
2014-08-04 | M14-20565-03 | 0.240 ppb |
2014-08-04 | M14-20565-05 | 0.260 ppb |
2014-08-04 | M14-20565-01 | 0.0630 ppb |
2014-11-05 | M14-25379-03 | 0.350 ppb |
2014-11-05 | M14-25379-05 | 0.210 ppb |
2014-11-05 | M14-25379-01 | 0.0440 ppb |
2015-02-09 | M15-11600-03 | 0.1000 ppb |
2015-02-09 | M15-11600-05 | 0.130 ppb |
2015-02-09 | M15-11600-01 | 0.0620 ppb |