Chromium (hexavalent)
Harris County MUD 102
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).
32
Samples
0
Samples exceeding legal limit (MCL)
28
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.104 ppb | 32 | 28 | ND - 0.917 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 |
|---|---|---|
| 2014-03-31 | 4D08012-05 | 0.0359 ppb |
| 2014-03-31 | 4D08012-01 | ND |
| 2014-03-31 | 4D08012-02 | 0.0609 ppb |
| 2014-03-31 | 4D08012-06 | 0.0451 ppb |
| 2014-03-31 | 4D08012-04 | 0.0551 ppb |
| 2014-03-31 | 4D08012-03 | 0.0419 ppb |
| 2014-03-31 | 4D08012-09 | ND |
| 2014-03-31 | 4D08012-10 | 0.0318 ppb |
| 2014-03-31 | 4D08012-12 | 0.0393 ppb |
| 2014-03-31 | 4D08012-11 | ND |
| 2014-03-31 | 4D08012-08 | 0.0396 ppb |
| 2014-03-31 | 4D08012-07 | 0.0312 ppb |
| 2014-06-17 | 4F24013-01 | 0.0766 ppb |
| 2014-06-17 | 4F24013-02 | 0.0829 ppb |
| 2014-06-26 | 4G01019-02 | 0.0914 ppb |
| 2014-06-26 | 4G01019-01 | 0.109 ppb |
| 2014-09-22 | 4I24023-03 | 0.0531 ppb |
| 2014-09-22 | 4I24023-09 | 0.904 ppb |
| 2014-09-22 | 4I24023-12 | 0.0550 ppb |
| 2014-09-22 | 4I24023-01 | ND |
| 2014-09-22 | 4I24023-10 | 0.0629 ppb |
| 2014-09-22 | 4I24023-11 | 0.917 ppb |
| 2014-09-22 | 4I24023-02 | 0.0491 ppb |
| 2014-09-22 | 4I24023-07 | 0.0525 ppb |
| 2014-09-22 | 4I24023-08 | 0.0600 ppb |
| 2014-09-22 | 4I24023-05 | 0.0782 ppb |
| 2014-09-22 | 4I24023-04 | 0.0698 ppb |
| 2014-09-22 | 4I24023-06 | 0.0521 ppb |
| 2014-12-30 | 5A06007-03 | 0.0679 ppb |
| 2014-12-30 | 5A06007-04 | 0.0591 ppb |
| 2014-12-30 | 5A06007-01 | 0.0522 ppb |
| 2014-12-30 | 5A06007-02 | 0.0471 ppb |