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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Clear Brook City MUD

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).

 

20

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.00727 ppb61ND - 0.0436 ppb
20150.0313 ppb1410ND - 0.0629 ppb
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/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
2014-11-204K25045-02ND
2014-11-204K25045-01ND
2014-11-204K25045-06ND
2014-11-204K25045-030.0436 ppb
2014-11-204K25045-05ND
2014-11-204K25045-04ND
2015-02-185B20006-020.0302 ppb
2015-02-185B20006-04ND
2015-02-185B20006-010.0403 ppb
2015-02-185B20006-030.0378 ppb
2015-05-205E27024-020.0334 ppb
2015-05-205E27024-010.0518 ppb
2015-05-205E27024-03ND
2015-05-205E27024-04ND
2015-05-205E27024-050.0472 ppb
2015-05-205E27024-060.0629 ppb
2015-08-245H28015-030.0336 ppb
2015-08-245H28015-040.0425 ppb
2015-08-245H28015-02ND
2015-08-245H28015-010.0582 ppb