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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Exeter Water Department

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
20130.0649 ppb142ND - 0.590 ppb
2014ND50ND
2015ND20ND
2016ND20ND
2017ND10ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date Lab ID Result
2012-08-081208-00322-001ND
2013-06-03722804-9104ND
2013-06-03722800-9104ND
2013-06-03722802-9104ND
2013-06-03722824-9105ND
2013-07-18122703.01ND
2013-09-08743152-9752ND
2013-09-08743154-9752ND
2013-09-08743143-9752ND
2013-09-08743141-9752ND
2013-10-09125385.02ND
2013-12-03761604-10435ND
2013-12-03761600-10435ND
2013-12-03761602-104350.318 ppb
2013-12-03761598-104350.590 ppb
2014-03-04773032-10847ND
2014-03-04773030-10847ND
2014-03-04773034-10847ND
2014-03-04773036-10847ND
2014-07-09133509.01ND
2015-07-16145750.01ND
2015-09-09147823.01ND
2016-02-10152998.01ND
2016-07-13158246.01ND
2017-07-11170940.01ND