Menu

EWG's Tap Water Database

Donate

Arsenic

City of Chicago

Arsenic is a potent carcinogen and common contaminant in drinking water. Arsenic causes thousands of cases of cancer each year in the U.S. Click here to read more about arsenic.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND20ND
2011ND20ND
20120.598 ppb220.524 ppb - 0.672 ppb
20130.643 ppb220.519 ppb - 0.767 ppb
2014ND20ND
2015ND20ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.004 ppb

The health guideline of 0.004 ppb for arsenic 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.

EPA Maximum Contaminant
Level (MCL) 10 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-01-11SA00291-01_01ND
2010-01-12SA00352-01_01ND
2011-01-10SA10318-01_02ND
2011-01-10SA10303-01_02ND
2012-01-10SA20328-01_020.672 ppb
2012-01-10SA20333-01_020.524 ppb
2013-01-08SA30176-01_020.519 ppb
2013-01-08SA30177-01_020.767 ppb
2014-02-11SB40289-01_02ND
2014-02-11SB40288-01_02ND
2015-01-12SA50259-01_02ND
2015-01-12SA50260-01_02ND