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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

City of Baltimore

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND20ND
2015ND10ND
2016ND10ND
2017ND30ND

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
2012-01-04120104_01_TREATEND
2012-01-06120106_02_T1+T41ND
2013-01-07130107_01_94198AND
2013-01-07130107_02_94198BND
2014-01-06140106_01_141000ND
2014-01-08140108_02_TREATEND
2015-01-130300002BC0113201ND
2016-01-20160101_01ND
2017-03-272220018005ND
2017-04-03TP01_17_04_03ND
2017-04-04TP01_17_04_04ND