Chromium (hexavalent)
City of San Diego
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).
46
Samples
0
Samples exceeding legal limit (MCL)
21
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.0720 ppb | 12 | 10 | ND - 0.170 ppb |
| 2014 | 0.0510 ppb | 21 | 11 | ND - 0.360 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
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 |
|---|---|---|
| 2013-08-19 | 1308683-001B | 0.0900 ppb |
| 2013-08-19 | 1308684-001B | 0.110 ppb |
| 2013-08-20 | 1308736-001B | 0.1000 ppb |
| 2013-08-20 | 1308735-001B | 0.170 ppb |
| 2013-08-21 | 1308767-001B | 0.0900 ppb |
| 2013-08-21 | 1308768-001B | 0.0700 ppb |
| 2013-11-12 | 1311404-001B | 0.110 ppb |
| 2013-11-12 | 1311402-001B | 0.0300 ppb |
| 2013-11-12 | 1311405-001B | 0.0440 ppb |
| 2013-11-12 | 1311403-001B | 0.0500 ppb |
| 2013-11-13 | 1311446-001B | ND |
| 2013-11-13 | 1311448-001B | ND |
| 2014-02-03 | 9437-001-0000 | ND |
| 2014-02-03 | 9437-006-0000 | ND |
| 2014-02-03 | 9437-010-0000 | ND |
| 2014-02-10 | 1402419-001B | 0.0820 ppb |
| 2014-02-10 | 1402421-001B | 0.0950 ppb |
| 2014-02-10 | 1402420-001B | 0.0760 ppb |
| 2014-02-10 | 1402418-001B | 0.360 ppb |
| 2014-02-11 | 1402513-001B | 0.0870 ppb |
| 2014-02-11 | 1402514-001B | 0.0500 ppb |
| 2014-05-05 | 9437-006-0000 | ND |
| 2014-05-05 | 9437-010-0000 | ND |
| 2014-05-05 | 9437-001-0000 | ND |
| 2014-05-12 | 1405469-001B | 0.0600 ppb |
| 2014-05-12 | 1405512-001B | 0.0570 ppb |
| 2014-05-12 | 1405511-001B | 0.0890 ppb |
| 2014-05-12 | 1405468-001B | 0.0820 ppb |
| 2014-05-13 | 1405607-001B | ND |
| 2014-05-13 | 1405606-001B | 0.0340 ppb |
| 2014-08-04 | 9437-010-0000 | ND |
| 2014-08-04 | 9437-006-0000 | ND |
| 2014-08-04 | 9437-001-0000 | ND |
| 2016-07-20 | 9437-001-0000 | ND |
| 2016-07-20 | 9437-006-0000 | ND |
| 2017-07-12 | 9437-001-0000 | ND |
| 2017-07-12 | 9437-006-0000 | ND |
| 2017-07-12 | 9437-010-0000 | ND |
| 2018-07-11 | 9437-030-0000 | ND |
| 2018-07-12 | 9437-006-0000 | ND |
| 2018-07-12 | 9437-001-0000 | ND |
| 2018-07-12 | 9437-010-0000 | ND |
| 2019-04-15 | 9437-001-0000 | ND |
| 2019-04-15 | 9437-006-0000 | ND |
| 2019-04-15 | 9437-010-0000 | ND |
| 2019-07-17 | 9437-030-0000 | ND |