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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Waterbury Water Department

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

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.110 ppb83ND - 0.360 ppb
20150.0900 ppb83ND - 0.280 ppb
2016ND40ND
2017ND40ND
2018ND40ND
2019N/A00N/A

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
2014-07-1620188820010.290 ppb
2014-07-1620188820020.230 ppb
2014-09-25RWA200405008IOC1ND
2014-10-07RWA200405696IOCRND
2014-10-07RWA200405697IOCRND
2014-10-07RWA200405698IOCRND
2014-10-162035180001ND
2014-10-1620351800030.360 ppb
2015-01-222051402001ND
2015-01-2220514020030.230 ppb
2015-04-2220667370010.210 ppb
2015-04-2220667370030.280 ppb
2015-10-27RWA200427526IOC1ND
2015-10-29RWA200427673IOCRND
2015-10-29RWA200427677IOCRND
2015-10-29RWA200427674IOCRND
2016-10-13RWA200452356IOCRND
2016-10-13RWA200452355IOCRND
2016-10-13RWA200452354IOCRND
2016-10-13RWA200452357IOC1ND
2017-09-27200478150IOCRND
2017-09-27200478153IOCRND
2017-09-27200478147IOCRND
2017-09-27200478156IOC1ND
2018-10-17RWA200509564IOCRND
2018-10-17RWA200509566IOCRND
2018-10-17RWA200509568IOCRND
2018-10-18RWA200509712IOC1ND