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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Westford 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)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.120 ppb12120.0850 ppb - 0.150 ppb
20150.163 ppb440.150 ppb - 0.180 ppb
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/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 Result
2014-04-230.130 ppb
2014-04-230.110 ppb
2014-04-230.0850 ppb
2014-04-230.150 ppb
2014-07-150.150 ppb
2014-07-150.140 ppb
2014-07-150.110 ppb
2014-07-150.110 ppb
2014-10-270.1000 ppb
2014-10-270.110 ppb
2014-10-270.150 ppb
2014-10-270.0900 ppb
2015-01-140.150 ppb
2015-01-140.180 ppb
2015-01-140.160 ppb
2015-01-140.160 ppb