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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Hilo

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
2012N/A00N/A
20130.851 ppb880.710 ppb - 1.000 ppb
20140.600 ppb128ND - 1.10 ppb
2015N/A00N/A
2016N/A00N/A
20170.260 ppb51ND - 1.30 ppb

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
2013-09-23201309250037AM0.710 ppb
2013-09-23201309250130AM0.720 ppb
2013-09-23201309250033AM1.000 ppb
2013-09-23201309250113AM0.860 ppb
2013-09-23201309250031AM0.840 ppb
2013-09-23201309250121AM0.850 ppb
2013-09-23201309250035AM0.850 ppb
2013-09-23201309250118AM0.980 ppb
2014-01-22C14-01-0045ND
2014-01-22C14-01-0048ND
2014-01-22C14-01-0047ND
2014-01-22C14-01-0046ND
2014-03-24201403260446AM0.770 ppb
2014-03-24201403260442AM0.880 ppb
2014-03-24201403260462AM1.10 ppb
2014-03-24201403260451AM1.000 ppb
2014-03-24201403260471AM0.900 ppb
2014-03-24201403260453AM0.770 ppb
2014-03-24201403260469AM0.900 ppb
2014-03-24201403260456AM0.880 ppb
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-05-091.30 ppb