Chromium (hexavalent)
City of Crowley
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)
16
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.0562 ppb | 30 | 14 | ND - 0.219 ppb |
| 2015 | 0.0483 ppb | 2 | 2 | 0.0474 ppb - 0.0492 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 |
|---|---|---|
| 2014-04-09 | 4D15012-14 | ND |
| 2014-04-09 | 4D15012-05 | ND |
| 2014-04-09 | 4D15012-03 | ND |
| 2014-04-09 | 4D15012-07 | ND |
| 2014-04-09 | 4D15012-04 | 0.0364 ppb |
| 2014-04-09 | 4D15012-06 | 0.155 ppb |
| 2014-04-09 | 4D15012-08 | ND |
| 2014-04-09 | 4D15012-01 | ND |
| 2014-04-09 | 4D15012-02 | ND |
| 2014-04-09 | 4D15012-13 | ND |
| 2014-04-09 | 4D15012-12 | ND |
| 2014-04-09 | 4D15012-10 | ND |
| 2014-04-09 | 4D15012-09 | ND |
| 2014-04-09 | 4D15012-11 | ND |
| 2014-07-09 | 4G15021-01 | ND |
| 2014-07-09 | 4G15021-02 | ND |
| 2014-10-22 | 4J29004-07 | 0.171 ppb |
| 2014-10-22 | 4J29004-05 | ND |
| 2014-10-22 | 4J29004-03 | 0.0343 ppb |
| 2014-10-22 | 4J29004-04 | ND |
| 2014-10-22 | 4J29004-01 | 0.154 ppb |
| 2014-10-22 | 4J29004-06 | 0.0971 ppb |
| 2014-10-22 | 4J29004-10 | 0.112 ppb |
| 2014-10-22 | 4J29004-02 | 0.0733 ppb |
| 2014-10-22 | 4J29004-11 | 0.0710 ppb |
| 2014-10-22 | 4J29004-08 | 0.173 ppb |
| 2014-10-22 | 4J29004-12 | 0.106 ppb |
| 2014-10-22 | 4J29004-09 | 0.0806 ppb |
| 2014-10-22 | 4J29004-14 | 0.202 ppb |
| 2014-10-22 | 4J29004-13 | 0.219 ppb |
| 2015-01-21 | 5A27018-01 | 0.0474 ppb |
| 2015-01-21 | 5A27018-02 | 0.0492 ppb |