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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Redmond Water System

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.00 ppb112.00 ppb
2013N/A00N/A
2014ND20ND
20150.0788 ppb164ND - 0.440 ppb
2016N/A00N/A
2017ND40ND

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
2012-07-16270852.00 ppb
2014-09-24A4H1630-06AND
2014-09-24A4H1630-01AND
2015-03-04A5B1435-01AND
2015-03-04A5B1435-06AND
2015-06-09A5C2165-07AND
2015-06-09A5C2165-05A0.270 ppb
2015-06-09A5C2165-01A0.200 ppb
2015-06-09A5C2165-03AND
2015-06-09A5C2165-11AND
2015-06-09A5C2165-09AND
2015-08-18A5G2132-01A0.350 ppb
2015-09-09A5C2343-01AND
2015-09-09A5C2343-07AND
2015-09-09A5C2347-03AND
2015-09-09A5C2347-01AND
2015-09-09A5C2343-03AND
2015-09-09A5C2343-05AND
2015-12-15A5K1615-01A0.440 ppb
2017-05-03ND
2017-05-03ND
2017-05-03ND
2017-05-03ND