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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

California Water Service Co-leona Valley

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013N/A00N/A
2014ND10ND
20153.51 ppb54ND - 6.35 ppb
20160.854 ppb121ND - 10.3 ppb
2017ND130ND

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
2012-02-085810-006-1403ND
2014-05-065810-001-1356ND
2015-02-025810-006-1416ND
2015-06-095701-001-10275.99 ppb
2015-08-045701-001-13496.35 ppb
2015-08-045701-006-13473.74 ppb
2015-08-045701-005-13411.48 ppb
2016-02-095701-001-1045ND
2016-02-095701-005-1113ND
2016-02-095701-006-1041ND
2016-05-035701-001-1245ND
2016-05-035701-006-1237ND
2016-05-035701-005-1230ND
2016-08-095701-006-0905ND
2016-08-095701-005-0858ND
2016-08-095701-001-090210.3 ppb
2016-11-085701-005-1451ND
2016-11-085701-001-1429ND
2016-11-085701-006-1420ND
2017-02-075701-005-1120ND
2017-02-075701-006-1142ND
2017-02-075701-001-1137ND
2017-05-085810-001-1248ND
2017-05-095701-006-0949ND
2017-05-095701-001-0946ND
2017-05-095701-005-0940ND
2017-08-155701-005-1356ND
2017-08-155701-006-1405ND
2017-08-155701-001-1400ND
2017-11-085701-005-1414ND
2017-11-085701-001-1723ND
2017-12-125701-006-1531ND