Chromium (hexavalent)
City of Humble
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 |
---|---|---|---|---|
2013 | 0.619 ppb | 14 | 14 | 0.120 ppb - 0.800 ppb |
2014 | 0.479 ppb | 14 | 14 | 0.0800 ppb - 0.880 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 |
---|---|---|
2013-09-16 | 2897637 | 0.790 ppb |
2013-09-16 | 2897706 | 0.120 ppb |
2013-09-16 | 2897795 | 0.610 ppb |
2013-09-16 | 2897738 | 0.710 ppb |
2013-09-16 | 2897645 | 0.740 ppb |
2013-09-16 | 2897625 | 0.790 ppb |
2013-09-16 | 2897657 | 0.710 ppb |
2013-09-16 | 2897697 | 0.790 ppb |
2013-09-16 | 2897641 | 0.800 ppb |
2013-09-16 | 2897765 | 0.540 ppb |
2013-09-16 | 2897715 | 0.750 ppb |
2013-09-16 | 2897649 | 0.560 ppb |
2013-12-03 | 2939512 | 0.540 ppb |
2013-12-03 | 2939519 | 0.220 ppb |
2014-03-20 | 2996246 | 0.1000 ppb |
2014-03-20 | 2996254 | 0.780 ppb |
2014-03-20 | 2995718 | 0.0800 ppb |
2014-03-20 | 2997016 | 0.1000 ppb |
2014-03-20 | 2995832 | 0.540 ppb |
2014-03-20 | 2996224 | 0.880 ppb |
2014-03-20 | 2996998 | 0.780 ppb |
2014-03-20 | 2995813 | 0.370 ppb |
2014-09-23 | 3113387 | 0.750 ppb |
2014-09-23 | 3113376 | 0.680 ppb |
2014-09-23 | 3113380 | 0.420 ppb |
2014-09-23 | 3113379 | 0.630 ppb |
2014-11-17 | 3140547 | 0.240 ppb |
2014-11-17 | 3140539 | 0.360 ppb |