EWG's Tap Water Database — 2019 UPDATE


Chromium (hexavalent)

Avon Water Company

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
20130.453 ppb16160.140 ppb - 1.000 ppb
20140.443 ppb16160.150 ppb - 0.980 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
2013-07-27201307310232AM0.410 ppb
2013-07-29201307310252AM0.940 ppb
2013-07-29201307310318AM0.420 ppb
2013-07-29201307310230AM0.410 ppb
2013-07-30201307310228AM0.660 ppb
2013-07-30201307310247AM0.190 ppb
2013-07-30201307310234AM0.230 ppb
2013-07-30201308010339AM0.450 ppb
2013-07-30201307310322AM0.470 ppb
2013-07-31201308010405AM0.740 ppb
2013-07-31201308010421AM0.440 ppb
2013-07-31201308010397AM0.180 ppb
2013-07-31201308010418AM0.410 ppb
2013-07-31201308010341AM0.160 ppb
2013-07-31201308010335AM1.000 ppb
2013-08-08201308090201AM0.140 ppb
2014-01-20201401210079AM0.480 ppb
2014-01-20201401210081AM0.400 ppb
2014-01-20201401210109AM0.360 ppb
2014-01-20201401210075AM0.390 ppb
2014-01-20201401210083AM0.380 ppb
2014-01-20201401210077AM0.380 ppb
2014-01-20201401210111AM0.940 ppb
2014-01-27201401280240AM0.380 ppb
2014-01-27201401280268AM0.670 ppb
2014-01-27201401280228AM0.170 ppb
2014-01-27201401280264AM0.150 ppb
2014-01-27201401280232AM0.980 ppb
2014-01-27201401280221AM0.430 ppb
2014-01-27201401280266AM0.390 ppb
2014-01-27201401280211AM0.380 ppb
2014-02-12201402130357AM0.210 ppb