Chromium (hexavalent)
Lehigh County Authority Allentown Division
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 |
|---|---|---|---|---|
| 2013 | 0.719 ppb | 6 | 6 | 0.554 ppb - 0.906 ppb |
| 2014 | 0.556 ppb | 6 | 6 | 0.390 ppb - 0.670 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 |
| 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 |
|---|---|---|
| 2013-07-22 | 732604-9365 | 0.854 ppb |
| 2013-07-22 | 732600-9365 | 0.630 ppb |
| 2013-07-22 | 732602-9365 | 0.567 ppb |
| 2013-10-09 | 751815-10020 | 0.906 ppb |
| 2013-10-09 | 751811-10011 | 0.801 ppb |
| 2013-10-09 | 751813-10011 | 0.554 ppb |
| 2014-01-15 | 766746-10591 | 0.669 ppb |
| 2014-01-15 | 766744-10591 | 0.443 ppb |
| 2014-01-15 | 766742-10604 | 0.662 ppb |
| 2014-04-22 | 14040706-02 | 0.670 ppb |
| 2014-04-22 | 14040706-03 | 0.500 ppb |
| 2014-04-22 | 14040706-01 | 0.390 ppb |