Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chromium (total)

City of Lewiston

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.

 

41

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
20130.698 ppb166ND - 3.10 ppb
20140.405 ppb62ND - 1.36 ppb
20151.51 ppb64ND - 2.71 ppb
20161.76 ppb441.11 ppb - 2.68 ppb
2017ND50ND

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
2012-04-03I59255ND
2012-08-15I62176ND
2012-08-15I62177ND
2012-08-15I62178ND
2013-02-19WA97-SE1-13-0361ND
2013-02-19WA97-SE1-13-0361ND
2013-02-19WA97-SE1-13-0361ND
2013-02-19WA97-SE1-13-3614ND
2013-02-27I130228026-001ND
2013-05-21130522003-002ND
2013-05-21130522003-0010.248 ppb
2013-06-05I130606050-0012.90 ppb
2013-06-05I130606050-0021.45 ppb
2013-08-14130814066-002ND
2013-08-14130814066-001ND
2013-08-21I130822058-0013.10 ppb
2013-08-21I130822058-0051.35 ppb
2013-08-21I130822058-0042.12 ppb
2013-11-12131112036-002ND
2013-11-12131112036-001ND
2014-02-25I140226039-0021.36 ppb
2014-02-25I140226039-001ND
2014-06-03I140604041-002ND
2014-06-03I140604041-0011.07 ppb
2014-08-13I140814054-004ND
2014-08-13I140814054-005ND
2015-01-21I150122025-001ND
2015-04-21I150422037-0012.53 ppb
2015-06-10I150611032-0012.71 ppb
2015-06-10I150611032-0021.14 ppb
2015-07-22I150723044-001ND
2015-07-22I150723044-0032.67 ppb
2016-02-09I160209050-0021.11 ppb
2016-02-09I160209050-0011.85 ppb
2016-04-06I160407008-0031.38 ppb
2016-04-06I160407008-0012.68 ppb
2017-03-28I170328050-002ND
2017-03-28I170328050-001ND
2017-10-25I171026026-002ND
2017-10-25I171026026-003ND
2017-10-25I171026026-001ND