EWG's Tap Water Database — 2021 UPDATE


Chromium (hexavalent)

City of Livermore

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 exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20140.254 ppb880.0400 ppb - 1.40 ppb
201510.3 ppb669.00 ppb - 11.0 ppb
20169.50 ppb449.00 ppb - 10.00 ppb
201710.9 ppb11117.50 ppb - 13.0 ppb
201813.1 ppb7712.0 ppb - 14.0 ppb
201910.2 ppb996.50 ppb - 13.0 ppb

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
2014-02-121402501-001B1.40 ppb
2014-02-121402500-001B0.210 ppb
2014-05-141405581-001B0.0510 ppb
2014-05-141405580-001B0.0590 ppb
2014-08-131408463-001B0.110 ppb
2014-08-131408464-001B0.120 ppb
2014-11-131411581-001B0.0400 ppb
2014-11-131411580-001B0.0430 ppb