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EWG's Tap Water Database — 2021 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)

27

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.143 ppb141ND - 2.00 ppb
20150.108 ppb131ND - 1.40 ppb
20161.62 ppb1311ND - 10.00 ppb
20170.364 ppb146ND - 1.000 ppb
20180.277 ppb134ND - 1.60 ppb
20190.215 ppb134ND - 1.10 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
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
2018-01-08ND
2018-02-051.60 ppb
2018-03-060.700 ppb
2018-04-04ND
2018-04-11ND
2018-05-01ND
2018-06-04ND
2018-07-10ND
2018-08-07ND
2018-09-10ND
2018-10-020.800 ppb
2018-11-130.500 ppb
2018-12-04ND
2019-01-140.500 ppb
2019-02-05ND
2019-03-05ND
2019-04-02ND
2019-04-301.10 ppb
2019-05-070.700 ppb
2019-06-11ND
2019-07-150.500 ppb
2019-08-12ND
2019-09-09ND
2019-10-17ND
2019-11-12ND
2019-12-04ND