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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Clear Lake City Water Authority

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

 

56

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0115 ppb361ND - 0.414 ppb
2014ND90ND
2015N/A00N/A
2016ND40ND
2017ND40ND
2018N/A00N/A
2019ND30ND

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
2013-04-09713554-8826ND
2013-04-09713548-8826ND
2013-04-09713546-8826ND
2013-04-09713542-8826ND
2013-04-09713560-8826ND
2013-04-09713534-8810ND
2013-04-09713544-88260.414 ppb
2013-04-09713556-8826ND
2013-04-09713562-8930ND
2013-04-09713536-8810ND
2013-04-09713552-8826ND
2013-04-09713550-8826ND
2013-04-09713532-8810ND
2013-04-09713558-8826ND
2013-07-10730565-9353ND
2013-07-10730593-9353ND
2013-07-10730567-9353ND
2013-07-10730595-9353ND
2013-07-10730569-9353ND
2013-07-10730571-9353ND
2013-07-10730585-9353ND
2013-07-10730591-9353ND
2013-10-08751242-9977ND
2013-10-08751244-9977ND
2013-10-08751296-9977ND
2013-10-08751267-9977ND
2013-10-08751306-9977ND
2013-10-08751310-9977ND
2013-10-08751308-9977ND
2013-10-08751248-9977ND
2013-10-08751275-9977ND
2013-10-08751367-10041ND
2013-10-08751246-9977ND
2013-10-08751262-9977ND
2013-10-08751283-9977ND
2013-10-22754854-10200ND
2014-01-08765736-10554ND
2014-01-08765716-10553ND
2014-01-08765722-10553ND
2014-01-08765704-10553ND
2014-01-08765710-10553ND
2014-01-08765708-10553ND
2014-01-08765706-10553ND
2014-01-08765714-10553ND
2014-02-26AC44690ND
2016-01-19AD18524ND
2016-01-19AD18525ND
2016-06-20AD41102ND
2016-06-20AD41098ND
2017-01-19AD65652ND
2017-03-08AD73955ND
2017-03-08AD73949ND
2017-03-08AD73951ND
2019-02-27AE56189ND
2019-02-27AE56190ND
2019-02-27AE56188ND