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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

Rockford

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.

 

56

Samples

0

Samples exceeding legal limit (MCL)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
20132.70 ppb42ND - 8.90 ppb
20140.618 ppb225ND - 6.70 ppb
20150.733 ppb32ND - 1.10 ppb
20160.550 ppb21ND - 1.10 ppb
20170.487 ppb236ND - 3.00 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
2012-01-242012864-04ND
2012-04-252043207-04ND
2013-06-253063688-011.90 ppb
2013-10-153102473-018.90 ppb
2013-11-133111834-01ND
2013-12-034013379-01ND
2014-01-214012700-05ND
2014-01-214012700-03ND
2014-01-214012700-061.40 ppb
2014-01-214012700-04ND
2014-01-224012700-022.50 ppb
2014-01-224012700-01ND
2014-01-274013503-02ND
2014-01-284013503-012.00 ppb
2014-01-314020631-03ND
2014-01-314020631-01ND
2014-01-314020631-04ND
2014-01-314020631-05ND
2014-01-314020631-02ND
2014-02-184022289-01ND
2014-02-184022291-01ND
2014-02-254023202-01ND
2014-07-234073622-01ND
2014-07-234073622-04ND
2014-07-234073622-05ND
2014-10-284104357-01ND
2014-12-054121752-011.000 ppb
2014-12-124122805-016.70 ppb
2015-01-285013651-041.10 ppb
2015-04-155042507-02ND
2015-06-175062896-011.10 ppb
2016-10-126102040-011.10 ppb
2016-12-146122205-01ND
2017-01-067011622-013.00 ppb
2017-01-067011622-02ND
2017-01-137012603-02ND
2017-01-137012603-01ND
2017-01-137012600-02ND
2017-01-137012603-03ND
2017-01-137012600-01ND
2017-01-137012600-041.10 ppb
2017-01-207013468-04ND
2017-01-207013468-01ND
2017-01-207013468-02ND
2017-02-037021369-01ND
2017-02-037021369-02ND
2017-02-107022427-01ND
2017-03-087031384-011.10 ppb
2017-05-267055219-01ND
2017-07-247075084-06ND
2017-07-247075084-022.70 ppb
2017-07-247075084-03ND
2017-07-247075084-072.20 ppb
2017-07-247075084-05ND
2017-10-137103385-031.10 ppb
2017-12-067121184-03ND