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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Hollister

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.

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20139.32 ppb24240.210 ppb - 16.0 ppb
201413.2 ppb64ND - 33.0 ppb
2015N/A00N/A
2016N/A00N/A
20175.00 ppb52ND - 13.0 ppb

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
2013-02-20A3B1556-07A16.0 ppb
2013-02-20A3B1556-13A0.230 ppb
2013-02-20A3B1556-26A0.220 ppb
2013-02-20A3B1556-24A16.0 ppb
2013-02-20A3B1556-28A14.0 ppb
2013-02-20A3B1556-19A15.0 ppb
2013-02-20A3B1556-22A15.0 ppb
2013-02-20A3B1556-01A0.240 ppb
2013-02-20A3B1556-10A14.0 ppb
2013-02-20A3B1556-04A13.0 ppb
2013-02-20A3B1556-16A0.230 ppb
2013-08-14A3G2477-01A2.00 ppb
2013-08-14A3G2471-01A13.0 ppb
2013-08-14A3G2471-03A16.0 ppb
2013-08-15A3G2471-17A13.0 ppb
2013-08-15A3G2471-13A15.0 ppb
2013-08-15A3G2471-15A9.60 ppb
2013-08-15A3G2477-03A15.0 ppb
2013-08-15A3G2471-05A13.0 ppb
2013-08-15A3G2471-07A0.210 ppb
2013-08-15A3G2471-09A0.280 ppb
2013-08-15A3G2471-11A16.0 ppb
2013-11-14A3J1986-03A5.90 ppb
2013-11-14A3J1986-01A0.690 ppb
2014-06-121610-005-101515.0 ppb
2014-06-121610-009-105533.0 ppb
2014-06-121610-001-1205ND
2014-06-121610-002-1145ND
2014-06-121610-007-125015.0 ppb
2014-06-121610-006-131516.0 ppb
2017-06-011610-002-1045ND
2017-06-011610-001-1011ND
2017-06-081610-005-115013.0 ppb
2017-06-081610-006-123612.0 ppb
2017-06-081610-007-0916ND