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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

City of Gilroy

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

 

28

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.609 ppb2821ND - 1.70 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-14A3L2052-05A0.530 ppb
2014-01-14A3L2052-07A0.740 ppb
2014-01-14A3L2052-03A0.690 ppb
2014-01-14A3L2052-15A1.10 ppb
2014-01-14A3L2052-17A0.710 ppb
2014-01-14A3L2052-19A0.970 ppb
2014-01-14A3L2052-09A1.70 ppb
2014-01-14A3L2052-11A1.40 ppb
2014-03-24A4C1501-01A0.740 ppb
2014-05-27A4C1893-01A0.240 ppb
2014-07-08A4F1134-07A0.390 ppb
2014-07-08A4F1134-13A1.10 ppb
2014-07-08A4F1134-28A0.850 ppb
2014-07-08A4F1134-01A0.580 ppb
2014-07-08A4F1134-16A0.930 ppb
2014-07-08A4F1134-10A0.560 ppb
2014-07-08A4F1134-22A0.640 ppb
2014-08-04A4G2633-01A0.0560 ppb
2014-09-16A4I0774-01A0.720 ppb
2014-10-155810-002-1050ND
2014-10-155810-011-1010ND
2014-10-155810-004-1030ND
2014-10-155810-006-0946ND
2014-10-155810-007-08361.30 ppb
2014-10-155810-008-08521.10 ppb
2014-10-155810-009-0852ND
2014-10-155810-010-0818ND
2014-10-155810-001-0759ND