EWG's Tap Water Database — 2021 UPDATE


Chromium (hexavalent)

Beverly Hills / Rolling Oaks Subdivision

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
20140.367 ppb13130.0950 ppb - 0.490 ppb
20150.320 ppb13130.0350 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
2014-06-300.410 ppb
2014-06-300.380 ppb
2014-06-300.190 ppb
2014-06-300.280 ppb
2014-06-300.350 ppb
2014-06-300.0950 ppb
2014-06-300.380 ppb
2014-06-300.490 ppb
2014-06-300.490 ppb
2014-06-300.390 ppb
2014-06-300.400 ppb
2014-06-300.460 ppb
2014-06-300.460 ppb
2015-01-140.260 ppb
2015-01-140.400 ppb
2015-01-140.460 ppb
2015-01-140.430 ppb
2015-01-140.270 ppb
2015-01-140.370 ppb
2015-01-140.0960 ppb
2015-01-140.0350 ppb
2015-01-140.430 ppb
2015-01-140.240 ppb
2015-01-140.250 ppb
2015-01-140.480 ppb
2015-01-140.440 ppb