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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

Waukesha Water Utility

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.480 ppb72ND - 2.80 ppb
20150.650 ppb41ND - 2.60 ppb
2016N/A00N/A
20170.497 ppb72ND - 2.70 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.004 ppb

The EWG 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.

EPA Maximum Contaminant
Level (MCL) 10 ppb

The legal limit for arsenic, established in 2001, was based on costs for arsenic removal, as calculated at the time that the standard was set. This limit does not fully protect against the risk of cancer due to arsenic exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-26776756ND
2014-03-26776754ND
2014-05-07784420ND
2014-05-07784423ND
2014-05-077844262.80 ppb
2014-06-117961010.560 ppb
2014-06-11796104ND
2015-03-108478502.60 ppb
2015-03-10847852ND
2015-03-11847854ND
2015-09-29886381ND
2017-03-28980079ND
2017-03-28980085ND
2017-03-289800822.70 ppb
2017-05-02986362ND
2017-05-02986365ND
2017-05-31994538ND
2017-05-319945410.780 ppb