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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

Watertown City

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).

 

8

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.0305 ppb83ND - 0.102 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A

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
2014-02-05769348-107130.0770 ppb
2014-02-05769346-10713ND
2014-05-07784713-11327ND
2014-05-07784715-113270.102 ppb
2014-08-06808931-12026ND
2014-08-06808933-120260.0650 ppb
2014-11-17831975-12861ND
2014-11-17831973-12861ND