Know Your Environment. Protect Your Health.

Chromium (hexavalent)

Wallingford Water Department

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).

 

16

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.293 ppb87ND - 0.570 ppb
20140.230 ppb84ND - 0.540 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2013-07-2935102394001AM0.570 ppb
2013-07-2935102390003AM0.0850 ppb
2013-07-2935102390001AM0.0390 ppb
2013-07-2935102394003AM0.570 ppb
2013-07-2935102396003AM0.460 ppb
2013-07-2935102396001AM0.570 ppb
2013-10-0835111726003AM0.0490 ppb
2013-10-0835111726001AMND
2014-01-2135123700001AMND
2014-01-2135123700003AMND
2014-01-2235123713001AM0.400 ppb
2014-01-2235123713003AM0.380 ppb
2014-02-1935127228006AM0.540 ppb
2014-02-1935127228004AM0.520 ppb
2014-04-0135132663001AMND
2014-04-0135132663003AMND