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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

Marco Island Utilities

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.

 

80

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.246 ppb132ND - 1.70 ppb
2013ND130ND
20140.143 ppb141ND - 2.00 ppb
20150.108 ppb131ND - 1.40 ppb
20161.62 ppb1311ND - 10.00 ppb
20170.364 ppb146ND - 1.000 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 Result
2012-01-04ND
2012-02-011.50 ppb
2012-03-06ND
2012-03-20ND
2012-04-04ND
2012-05-08ND
2012-06-07ND
2012-07-02ND
2012-08-07ND
2012-09-011.70 ppb
2012-10-01ND
2012-11-12ND
2012-12-11ND
2013-01-14ND
2013-02-07ND
2013-03-11ND
2013-04-04ND
2013-04-04ND
2013-05-13ND
2013-06-10ND
2013-07-01ND
2013-08-05ND
2013-09-10ND
2013-10-10ND
2013-11-04ND
2013-12-04ND
2014-01-08ND
2014-02-05ND
2014-03-052.00 ppb
2014-03-18ND
2014-03-18ND
2014-04-07ND
2014-05-08ND
2014-06-09ND
2014-07-14ND
2014-08-05ND
2014-09-08ND
2014-10-07ND
2014-11-05ND
2014-12-02ND
2015-01-06ND
2015-02-09ND
2015-03-04ND
2015-03-16ND
2015-04-09ND
2015-05-111.40 ppb
2015-06-04ND
2015-07-07ND
2015-08-05ND
2015-09-02ND
2015-10-12ND
2015-11-03ND
2015-12-07ND
2016-01-14ND
2016-02-02ND
2016-03-011.60 ppb
2016-04-050.700 ppb
2016-04-211.000 ppb
2016-05-041.50 ppb
2016-06-012.30 ppb
2016-07-060.800 ppb
2016-08-020.900 ppb
2016-09-071.20 ppb
2016-10-060.500 ppb
2016-11-0210.00 ppb
2016-12-070.600 ppb
2017-01-05ND
2017-02-010.800 ppb
2017-03-06ND
2017-04-041.000 ppb
2017-04-041.000 ppb
2017-04-25ND
2017-05-010.800 ppb
2017-06-05ND
2017-07-100.900 ppb
2017-08-10ND
2017-09-250.600 ppb
2017-10-05ND
2017-11-01ND
2017-12-05ND