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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Brighton

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
20140.286 ppb145ND - 2.00 ppb
20150.470 ppb108ND - 1.000 ppb
2016ND20ND
20170.500 ppb21ND - 1.000 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 Result
2012-09-17ND
2012-09-17ND
2013-03-11ND
2013-03-11ND
2014-03-18ND
2014-03-182.00 ppb
2014-07-220.550 ppb
2014-07-22ND
2014-07-22ND
2014-07-22ND
2014-07-220.260 ppb
2014-07-22ND
2014-10-15ND
2014-10-15ND
2014-10-15ND
2014-10-150.730 ppb
2014-10-150.470 ppb
2014-10-15ND
2015-01-26ND
2015-01-260.730 ppb
2015-01-260.760 ppb
2015-01-260.240 ppb
2015-03-09ND
2015-03-091.000 ppb
2015-05-270.340 ppb
2015-05-270.200 ppb
2015-05-270.750 ppb
2015-05-270.680 ppb
2016-03-07ND
2016-03-07ND
2017-03-06ND
2017-03-061.000 ppb