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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Nueces County WCID 3

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
2013ND10ND
2014ND30ND
20150.0300 ppb71ND - 0.210 ppb
2016ND10ND
2017ND10ND

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
2013-08-06AC26869ND
2014-02-05AC41464ND
2014-12-09Q1459114001ND
2014-12-09Q1459114003ND
2015-02-19AC81112ND
2015-03-18Q1510001001ND
2015-03-18Q15100010030.210 ppb
2015-06-24Q1523689003ND
2015-06-24Q1523689001ND
2015-09-22Q1537802003ND
2015-09-22Q1537802001ND
2016-02-11AD23282ND
2017-03-21AD75975ND