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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Dover 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.

MORE ABOUT THIS CONTAMINANT

 

66

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.112 ppb354ND - 1.80 ppb
2015ND10ND
2016N/A00N/A
2017ND150ND
2018N/A00N/A
2019ND150ND

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
2014-03-24201403250143AMND
2014-03-24201403250132AMND
2014-03-24201403250127AMND
2014-03-24201403250145AMND
2014-03-25201403270282AMND
2014-03-25201403270318AMND
2014-03-25201403270437AM1.30 ppb
2014-03-25201403270433AMND
2014-03-25201403270321AMND
2014-03-26201403270306AMND
2014-03-26201403270206AMND
2014-03-26201403270425AMND
2014-03-26201403270163AMND
2014-03-26201403270400AMND
2014-03-26201403270429AMND
2014-03-26201403270427AMND
2014-03-31201404010215AM0.310 ppb
2014-09-16201409170760AMND
2014-09-16201409180277AMND
2014-09-16201409170752AMND
2014-09-16201409170723AMND
2014-09-16201409170855AMND
2014-09-17201409180608AMND
2014-09-17201409190318AMND
2014-09-17201409180627AMND
2014-09-17201409190310AMND
2014-09-22201409230406AMND
2014-09-22201409230467AMND
2014-09-22201409230332AM1.80 ppb
2014-09-23201409240352AM0.520 ppb
2014-09-23201409240342AMND
2014-09-23201409240394AMND
2014-09-23201409240385AMND
2014-09-24201409250535AMND
2014-11-24201411250345AMND
2015-03-12201503140140AMND
2017-12-07S779414ND
2017-12-12S779403ND
2017-12-12S779400ND
2017-12-12S779401ND
2017-12-12S779402ND
2017-12-12S779404ND
2017-12-12S779405ND
2017-12-12S779406ND
2017-12-12S779407ND
2017-12-12S779408ND
2017-12-12S779409ND
2017-12-12S779410ND
2017-12-12S779411ND
2017-12-12S779412ND
2017-12-12S779413ND
2019-07-29S856544ND
2019-07-30S856531ND
2019-07-30S856532ND
2019-07-30S856533ND
2019-07-30S856534ND
2019-07-30S856535ND
2019-07-30S856536ND
2019-07-30S856537ND
2019-07-30S856538ND
2019-07-30S856539ND
2019-07-30S856540ND
2019-07-30S856541ND
2019-07-30S856542ND
2019-07-30S856543ND
2019-07-30S856530ND