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EWG's Tap Water Database — 2021 UPDATE

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Thallium

Lee County Utilities

Thalium is a naturally occurring metal released into the environment from metal smelting and coal burning. Exposure to too much thalium can cause hair loss, liver damage, reduced sperm motility and nervous system impairment.

 

18

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND50ND
2015ND10ND
20160.300 ppb110.300 ppb
2017ND50ND
2018ND40ND
20190.150 ppb21ND - 0.300 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for thallium 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 harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 2 ppb

The legal limit for thallium, established in 1992, was based on analytical detection limits at the time that the standard was set.

ppb = parts per billion

All test results

Date Result
2014-02-05ND
2014-03-03ND
2014-04-16ND
2014-04-16ND
2014-10-08ND
2015-10-12ND
2016-10-030.300 ppb
2017-02-01ND
2017-03-02ND
2017-04-03ND
2017-04-03ND
2017-10-05ND
2018-06-11ND
2018-07-09ND
2018-10-01ND
2018-10-16ND
2019-01-070.300 ppb
2019-10-07ND