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EWG's Tap Water Database — 2019 UPDATE

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Asbestos

City of Chino Hills

Asbestos is a mineral fiber introduced into water by the dissolution of asbestos-containing minerals and from decay of asbestos cement in water mains. Asbestos causes cancer when ingested or inhaled.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013N/A00N/A
2014ND40ND
2015N/A00N/A
2016ND10ND
2017N/A00N/A

MFL = million fibers per liter

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 7 MFL

The legal limit for asbestos, established in 1991, was based on toxicity studies in laboratory animals conducted in the 1980s.

MFL = million fibers per liter

All test results

Date Lab ID Result
2012-07-180004-014-1130ND
2014-01-230004-001-1300ND
2014-01-230004-017-1330ND
2014-04-150004-009-1015ND
2014-04-150004-010-0930ND
2016-03-032283-014-1130ND