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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

Pennsylvania American Royersford

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.000 ppb62ND - 3.00 ppb
2013ND10ND
2014ND10ND
20150.800 ppb52ND - 3.00 ppb
2016ND10ND
2017ND10ND

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
2012-04-10172115013.00 ppb
2012-08-0718201301ND
2012-08-07182016013.00 ppb
2012-08-0718201701ND
2012-08-0718201801ND
2012-08-0718895301ND
2013-08-0823076901ND
2014-08-1226516801ND
2015-08-0613131558ND
2015-08-0613131572ND
2015-08-06131315853.00 ppb
2015-08-0613131545ND
2015-09-16132602881.000 ppb
2016-08-0414730030ND
2017-08-1516560899ND