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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Smyrna 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.

 

16

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
20131.20 ppb111.20 ppb
20140.203 ppb64ND - 0.356 ppb
20150.313 ppb660.304 ppb - 0.325 ppb
2016ND30ND
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
2013-01-10S2776101.20 ppb
2014-08-06808909-120410.356 ppb
2014-08-06808907-120410.216 ppb
2014-08-06808927-12041ND
2014-08-06808929-12098ND
2014-08-06808923-120980.329 ppb
2014-08-06808925-120980.314 ppb
2015-02-24845077-135110.304 ppb
2015-02-24845079-135110.304 ppb
2015-02-24845075-135110.305 ppb
2015-02-24845081-135110.325 ppb
2015-02-24845085-135110.321 ppb
2015-02-24845083-135110.316 ppb
2016-10-11S694499ND
2016-10-11S694498ND
2016-10-11S694497ND