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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Riverhead WD

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).

MORE ABOUT THIS CONTAMINANT

 

26

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.484 ppb1211ND - 2.70 ppb
20140.513 ppb128ND - 2.60 ppb
2015N/A00N/A
20161.65 ppb11ND - 3.30 ppb
20171.58 ppb110.0800 ppb - 3.00 ppb
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 Lab ID Result
2013-09-18201309200390AM0.240 ppb
2013-09-18201309200382AM0.0390 ppb
2013-09-18201309200386AM0.0300 ppb
2013-09-18201309200394AM2.70 ppb
2013-09-18201309200388AM0.570 ppb
2013-09-18201309200392AM0.730 ppb
2013-09-18201309200398AM0.0300 ppb
2013-09-18201309200384AM0.0350 ppb
2013-09-18201309200396AM0.220 ppb
2013-09-20201309240332AM0.380 ppb
2013-09-20201309240330AM0.830 ppb
2013-09-20201309240328AMND
2014-03-1935131088009AM1.10 ppb
2014-03-1935131088005AM0.660 ppb
2014-03-1935131088007AMND
2014-03-1935131088001AMND
2014-03-1935131088003AM2.60 ppb
2014-03-2135132089006AM0.210 ppb
2014-03-2135132089001AM0.230 ppb
2014-03-2135132089003AM0.170 ppb
2014-03-2635131983003AMND
2014-03-2635131983001AMND
2014-03-2835132127001AM0.780 ppb
2014-06-0235140502001AM0.410 ppb
2016-09-021.65 ppb
2017-06-301.58 ppb