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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Washington Aqueduct Division

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.

 

143

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.000 ppb2423ND - 1.70 ppb
20130.783 ppb2419ND - 1.50 ppb
20140.146 ppb247ND - 0.700 ppb
2015ND240ND
2016ND240ND
2017ND230ND

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
2012-01-01Dalecarlia0.900 ppb
2012-01-01McMillan0.900 ppb
2012-02-01Dalecarlia0.900 ppb
2012-02-01McMillan0.900 ppb
2012-03-01Dalecarlia1.60 ppb
2012-03-01McMillan1.40 ppb
2012-04-01Dalecarlia1.10 ppb
2012-04-01McMillan1.30 ppb
2012-05-01Dalecarlia1.10 ppb
2012-05-01McMillan0.900 ppb
2012-06-01Dalecarlia1.10 ppb
2012-06-01McMillan0.700 ppb
2012-07-01Dalecarlia0.800 ppb
2012-07-01McMillan0.700 ppb
2012-08-01Dalecarlia1.70 ppb
2012-08-01McMillan1.30 ppb
2012-09-01Dalecarlia1.30 ppb
2012-09-01McMillan1.10 ppb
2012-10-01Dalecarlia1.10 ppb
2012-10-01McMillan0.900 ppb
2012-11-01Dalecarlia0.900 ppb
2012-11-01McMillan0.700 ppb
2012-12-01Dalecarlia0.700 ppb
2012-12-01McMillanND
2013-01-01DalecarliaND
2013-01-01McMillanND
2013-02-01Dalecarlia1.000 ppb
2013-02-01McMillanND
2013-03-01Dalecarlia0.600 ppb
2013-03-01McMillan0.700 ppb
2013-04-01Dalecarlia1.000 ppb
2013-04-01McMillan0.700 ppb
2013-05-01Dalecarlia1.000 ppb
2013-05-01McMillan0.800 ppb
2013-06-01Dalecarlia0.900 ppb
2013-06-01McMillan0.700 ppb
2013-07-01Dalecarlia1.30 ppb
2013-07-01McMillan1.10 ppb
2013-08-01Dalecarlia1.40 ppb
2013-08-01McMillan1.20 ppb
2013-09-01Dalecarlia0.800 ppb
2013-09-01McMillan0.800 ppb
2013-10-01Dalecarlia1.10 ppb
2013-10-01McMillan0.900 ppb
2013-11-01Dalecarlia1.50 ppb
2013-11-01McMillan1.30 ppb
2013-12-01DalecarliaND
2013-12-01McMillanND
2014-01-01Dalecarlia0.200 ppb
2014-01-01McMillanND
2014-02-01DalecarliaND
2014-02-01McMillan0.600 ppb
2014-03-01Dalecarlia0.700 ppb
2014-03-01McMillan0.600 ppb
2014-04-01Dalecarlia0.600 ppb
2014-04-01McMillan0.500 ppb
2014-05-01DalecarliaND
2014-05-01McMillanND
2014-06-01DalecarliaND
2014-06-01McMillanND
2014-07-01Dalecarlia0.300 ppb
2014-07-01McMillanND
2014-08-01DalecarliaND
2014-08-01McMillanND
2014-09-01DalecarliaND
2014-09-01McMillanND
2014-10-01DalecarliaND
2014-10-01McMillanND
2014-11-01DalecarliaND
2014-11-01McMillanND
2014-12-01DalecarliaND
2014-12-01McMillanND
2015-01-01DalecarliaND
2015-01-01McMillanND
2015-02-01DalecarliaND
2015-02-01McMillanND
2015-03-01DalecarliaND
2015-03-01McMillanND
2015-04-01DalecarliaND
2015-04-01McMillanND
2015-05-01DalecarliaND
2015-05-01McMillanND
2015-06-01DalecarliaND
2015-06-01McMillanND
2015-07-01DalecarliaND
2015-07-01McMillanND
2015-08-01DalecarliaND
2015-08-01McMillanND
2015-09-01DalecarliaND
2015-09-01McMillanND
2015-10-01DalecarliaND
2015-10-01McMillanND
2015-11-01DalecarliaND
2015-11-01McMillanND
2015-12-01DalecarliaND
2015-12-01McMillanND
2016-01-01DalecarliaND
2016-01-01McMillanND
2016-02-01DalecarliaND
2016-02-01McMillanND
2016-03-01DalecarliaND
2016-03-01McMillanND
2016-04-01DalecarliaND
2016-04-01McMillanND
2016-05-01DalecarliaND
2016-05-01McMillanND
2016-06-01DalecarliaND
2016-06-01McMillanND
2016-07-01DalecarliaND
2016-07-01McMillanND
2016-08-01DalecarliaND
2016-08-01McMillanND
2016-09-01DalecarliaND
2016-09-01McMillanND
2016-10-01DalecarliaND
2016-10-01McMillanND
2016-11-01DalecarliaND
2016-11-01McMillanND
2016-12-01DalecarliaND
2016-12-01McMillanND
2017-01-01DalecarliaND
2017-01-01McMillanND
2017-02-01DalecarliaND
2017-02-01McMillanND
2017-03-01DalecarliaND
2017-03-01McMillanND
2017-04-01DalecarliaND
2017-04-01McMillanND
2017-05-01DalecarliaND
2017-05-01McMillanND
2017-06-01DalecarliaND
2017-06-01McMillanND
2017-07-01DalecarliaND
2017-07-01McMillanND
2017-08-01DalecarliaND
2017-08-01McMillanND
2017-09-01DalecarliaND
2017-09-01McMillanND
2017-10-01DalecarliaND
2017-10-01McMillanND
2017-11-01DalecarliaND
2017-11-01McMillanND
2017-12-01DalecarliaND