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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Rapides Parish Waterworks District 3

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

 

42

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.114 ppb52ND - 0.300 ppb
20140.0406 ppb172ND - 0.380 ppb
2015ND20ND
2016ND60ND
2017ND80ND
2018ND20ND
2019ND20ND

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
2013-07-2335101586001AMND
2013-07-2335101586007AMND
2013-07-2335101586009AMND
2013-10-2135112897001AM0.300 ppb
2013-10-2135112897003AM0.270 ppb
2014-01-3035124497005AMND
2014-01-3035124497007AMND
2014-01-3035124497003AMND
2014-01-3035124497001AMND
2014-01-3035124497013AMND
2014-01-3035124497011AMND
2014-01-3035124497009AMND
2014-01-3035124497015AMND
2014-03-10AD89655ND
2014-03-10AD89655ND
2014-04-1035133815003AMND
2014-04-1035133815001AMND
2014-07-2335147496003AMND
2014-07-2335147496009AM0.310 ppb
2014-07-2335147496007AMND
2014-07-2335147496005AMND
2014-07-2335147496001AM0.380 ppb
2015-07-0835196532003ND
2015-07-0835196532003ND
2016-07-1835255428002ND
2016-07-1835255428001ND
2016-07-1835255428002ND
2016-07-1835255428001ND
2016-07-1935255757003ND
2016-07-1935255757003ND
2017-03-0835299871004ND
2017-03-0835299871003ND
2017-03-0835299871005ND
2017-03-0835299871005ND
2017-03-0835299871004ND
2017-03-0835299871003ND
2017-12-1935364700001ND
2017-12-1935364700001ND
2018-03-2235381823001ND
2018-03-2235381823001ND
2019-04-1735463257001ND
2019-04-1735463257001ND