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EWG's Tap Water Database — 2019 UPDATE

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Thallium

Aqua Pa Uwchlan

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND60ND
2013N/A00N/A
2014N/A00N/A
2015ND60ND
2016N/A00N/A
2017N/A00N/A

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 Lab ID Result
2012-02-23AD39503ND
2012-02-23AD39504ND
2012-02-29AD39501ND
2012-04-18AD45405ND
2012-07-03AD54026ND
2012-09-07AD62533ND
2015-02-1812395232ND
2015-02-1812395236ND
2015-03-1712509014ND
2015-03-1912509002ND
2015-03-1912509026ND
2015-08-1213128978ND