EWG's Tap Water Database — 2019 UPDATE


Chromium (hexavalent)

Citrus Springs

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
20140.488 ppb12120.400 ppb - 0.680 ppb
20150.437 ppb12120.410 ppb - 0.480 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 Result
2014-08-190.530 ppb
2014-08-190.680 ppb
2014-08-190.400 ppb
2014-08-190.420 ppb
2014-08-190.620 ppb
2014-08-190.420 ppb
2014-08-190.410 ppb
2014-08-190.430 ppb
2014-08-190.420 ppb
2014-09-240.430 ppb
2014-09-240.650 ppb
2014-09-240.440 ppb
2015-02-110.440 ppb
2015-02-110.440 ppb
2015-02-110.450 ppb
2015-02-110.440 ppb
2015-02-110.480 ppb
2015-02-120.430 ppb
2015-02-120.430 ppb
2015-02-120.430 ppb
2015-02-120.430 ppb
2015-02-120.430 ppb
2015-02-180.430 ppb
2015-02-180.410 ppb