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EWG's Tap Water Database — 2019 UPDATE

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Thallium

Chesterfield County Central Water System

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND40ND
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND

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
2012-06-05E120400846ND
2012-06-05E120400853ND
2012-06-05E120400813ND
2012-06-05E120400834ND
2013-04-23E130202517ND
2013-04-23E130202500ND
2013-04-23E130202495ND
2013-04-23E130202490ND
2014-04-22E140308581ND
2014-04-22E140308608ND
2014-04-22E140308599ND
2014-04-22E140308583ND
2015-04-23VA010-DCLSND
2015-04-23VA010-DCLSND
2015-04-23VA010-DCLSND
2015-04-23VA010-DCLSND
2016-04-25E160305667ND
2016-04-25E160305653ND
2016-04-25E160305669ND
2016-04-25E160305660ND
2017-04-19E170304740ND
2017-04-19E170304734ND
2017-04-19E170304729ND
2017-04-19E170304737ND