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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

SBDNO County Service Area 64

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.

MORE ABOUT THIS CONTAMINANT

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.719 ppb128ND - 1.40 ppb
2014ND10ND
2015ND20ND
2016ND30ND
2017ND10ND
2018N/A00N/A
2019ND40ND

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
2013-03-27B3C2917-011.40 ppb
2013-03-27B3C2917-05ND
2013-03-27B3C2917-070.510 ppb
2013-03-27B3C2917-030.420 ppb
2013-03-27B3C2917-091.40 ppb
2013-03-27B3C2917-111.30 ppb
2013-09-19B3I1975-03ND
2013-09-19B3I1975-01ND
2013-09-19B3I1975-05ND
2013-09-19B3I1975-071.30 ppb
2013-09-19B3I1975-091.20 ppb
2013-09-19B3I1975-111.10 ppb
2014-01-143761-005-1430ND
2015-07-303761-006-1525ND
2015-07-313761-006-1500ND
2016-01-043761-004-1105ND
2016-01-043761-002-1135ND
2016-01-043761-001-1235ND
2017-01-033761-005-1015ND
2019-01-073761-002-1010ND
2019-01-073761-001-1110ND
2019-01-173761-006-0950ND
2019-01-293761-004-1030ND