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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Cedar Hill

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.

 

13

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
20130.206 ppb127ND - 0.480 ppb
2014N/A00N/A
2015N/A00N/A
2016ND10ND
2017N/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
2013-01-281301755-001AND
2013-01-281301755-005A0.310 ppb
2013-01-281301755-007AND
2013-01-281301755-003AND
2013-04-251304931-003A0.370 ppb
2013-04-251304931-001A0.410 ppb
2013-07-30Q13045900070.396 ppb
2013-07-30Q1304590003ND
2013-07-30Q13045900050.480 ppb
2013-07-30Q13045900010.303 ppb
2013-10-28Q13099100030.205 ppb
2013-10-28Q1309910001ND
2016-10-07Q1643132004ND