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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of San Clemente

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND80ND
20140.0356 ppb91ND - 0.320 ppb
20150.102 ppb51ND - 0.510 ppb
2016N/A00N/A
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
2012-01-181805-021-1020ND
2013-09-113I11048-01AND
2013-09-113I11048-03AND
2013-09-113I11048-07AND
2013-09-113I11048-05AND
2013-12-093L09134-01AND
2013-12-093L09134-03AND
2013-12-093L09134-07AND
2013-12-093L09134-05AND
2014-02-041805-004-0910ND
2014-03-104C10057-03AND
2014-03-104C10057-01AND
2014-03-104C10057-07AND
2014-03-104C10057-05AND
2014-06-184F18051-05AND
2014-06-184F18051-07A0.320 ppb
2014-06-184F18051-01AND
2014-06-184F18051-03AND
2015-01-141805-021-1105ND
2015-07-295G29085-01AND
2015-07-295G29085-03AND
2015-12-025L02070-03A0.510 ppb
2015-12-025L02070-01AND
2017-02-081805-004-1115ND