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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

City of Hollister

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).

 

79

Samples

0

Samples exceeding legal limit (MCL)

66

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20139.09 ppb26260.170 ppb - 18.0 ppb
20149.50 ppb64ND - 15.0 ppb
20158.27 ppb159ND - 15.0 ppb
201610.4 ppb1713ND - 16.0 ppb
201711.6 ppb1514ND - 16.0 ppb

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
2013-02-20A3B1556-26A0.450 ppb
2013-02-20A3B1556-19A16.0 ppb
2013-02-20A3B1556-13A0.170 ppb
2013-02-20A3B1556-22A17.0 ppb
2013-02-20A3B1556-24A18.0 ppb
2013-02-20A3B1556-07A17.0 ppb
2013-02-20A3B1556-28A15.0 ppb
2013-02-20A3B1556-16A0.260 ppb
2013-02-20A3B1556-01A0.170 ppb
2013-02-20A3B1556-10A15.0 ppb
2013-02-20A3B1556-04A14.0 ppb
2013-05-30A3D1533-01A1.10 ppb
2013-05-30A3D1533-04A12.0 ppb
2013-08-14A3G2471-03A15.0 ppb
2013-08-14A3G2471-01A12.0 ppb
2013-08-14A3G2477-01A2.20 ppb
2013-08-15A3G2471-07A0.180 ppb
2013-08-15A3G2471-05A11.0 ppb
2013-08-15A3G2471-09A0.210 ppb
2013-08-15A3G2471-11A15.0 ppb
2013-08-15A3G2471-17A14.0 ppb
2013-08-15A3G2471-13A14.0 ppb
2013-08-15A3G2471-15A8.70 ppb
2013-08-15A3G2477-03A13.0 ppb
2013-11-14A3J1986-03A4.50 ppb
2013-11-14A3J1986-01A0.420 ppb
2014-11-181610-001-1045ND
2014-11-181610-002-1035ND
2014-11-181610-006-114015.0 ppb
2014-11-181610-007-113015.0 ppb
2014-11-181610-009-121513.0 ppb
2014-11-201610-005-092914.0 ppb
2015-01-281610-005-125814.0 ppb
2015-01-281610-009-131713.0 ppb
2015-01-281610-007-124315.0 ppb
2015-01-281610-001-1415ND
2015-01-281610-006-122813.0 ppb
2015-01-281610-002-1400ND
2015-08-115810-005-130213.0 ppb
2015-08-115810-006-122714.0 ppb
2015-08-115810-007-124714.0 ppb
2015-08-201610-002-1050ND
2015-09-161610-009-1150ND
2015-12-091610-001-0858ND
2015-12-091610-002-0906ND
2015-12-091610-006-093413.0 ppb
2015-12-091610-007-083115.0 ppb
2016-03-031610-006-093113.0 ppb
2016-03-031610-007-081115.0 ppb
2016-03-031610-002-0847ND
2016-03-031610-005-082414.0 ppb
2016-06-151610-007-092515.0 ppb
2016-06-151610-009-103510.00 ppb
2016-06-151610-005-094014.0 ppb
2016-06-151610-006-091015.0 ppb
2016-06-231610-002-0930ND
2016-09-221610-002-1015ND
2016-09-221610-005-121514.0 ppb
2016-09-221610-007-124113.0 ppb
2016-09-221610-006-125511.0 ppb
2016-12-141610-006-110513.0 ppb
2016-12-141610-002-1013ND
2016-12-141610-007-114416.0 ppb
2016-12-141610-005-084814.0 ppb
2017-03-011610-006-112013.0 ppb
2017-03-011610-005-092014.0 ppb
2017-03-011610-007-110316.0 ppb
2017-03-011610-009-124812.0 ppb
2017-06-081610-009-09498.60 ppb
2017-06-081610-005-115015.0 ppb
2017-06-081610-007-09166.50 ppb
2017-06-081610-006-123615.0 ppb
2017-09-071610-006-111412.0 ppb
2017-09-071610-005-093014.0 ppb
2017-09-071610-007-110015.0 ppb
2017-09-071610-009-0944ND
2017-12-071610-005-104814.0 ppb
2017-12-071610-007-101410.00 ppb
2017-12-071610-006-09508.80 ppb