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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Lathrop

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20123.00 ppb113.00 ppb
20130.980 ppb127ND - 2.30 ppb
20140.371 ppb71ND - 2.60 ppb
2015N/A00N/A
2016N/A00N/A
2017ND50ND

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
2012-11-205867-016-09583.00 ppb
2013-04-17A3C1742-04AND
2013-04-17A3C1742-10A1.70 ppb
2013-04-17A3C1742-01AND
2013-04-17A3C1742-12A0.260 ppb
2013-04-17A3C1742-07A2.00 ppb
2013-07-30A3F1565-04A1.60 ppb
2013-08-27A3F1565-06AND
2013-10-15A3I1433-01AND
2013-10-15A3I1434-01AND
2013-10-15A3I1433-04A2.30 ppb
2013-10-16A3I1434-04A2.30 ppb
2013-10-16A3I1433-06A1.60 ppb
2014-01-21A3L1662-01AND
2014-01-22A3L1662-04A2.60 ppb
2014-04-011610-016-0943ND
2014-04-011610-006-0920ND
2014-04-011610-005-0905ND
2014-06-031610-007-0843ND
2014-06-171610-008-0954ND
2017-04-039590-016-1105ND
2017-04-039590-008-1130ND
2017-04-039590-007-0947ND
2017-04-039590-006-1033ND
2017-04-039590-005-1012ND