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EWG's Tap Water Database — 2021 UPDATE

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Thallium

City of Granbury

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.

MORE ABOUT THIS CONTAMINANT

 

31

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND30ND
2015ND30ND
20160.0443 ppb71ND - 0.310 ppb
2017ND90ND
2018ND30ND
2019ND60ND

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
2014-02-26Q1406448007ND
2014-07-09Q1426808015ND
2014-10-22Q1453503009ND
2015-06-18Q1522966020ND
2015-06-18Q1522966019ND
2015-06-18Q1522966018ND
2016-01-14Q1601671011ND
2016-01-14Q1601671010ND
2016-01-14Q1601671009ND
2016-01-14Q1601671008ND
2016-01-14Q16016710070.310 ppb
2016-01-14Q1601671006ND
2016-05-31Q1621308001ND
2017-07-06Q1727515013ND
2017-09-19Q1744801016ND
2017-09-19Q1744801001ND
2017-10-04Q1748839030ND
2017-10-04Q1748839029ND
2017-10-04Q1748839028ND
2017-10-04Q1748839027ND
2017-10-04Q1748839026ND
2017-10-04Q1748839002ND
2018-05-02Q1817630004ND
2018-05-02Q1817630003ND
2018-05-02Q1817630019ND
2019-03-18Q1911097025ND
2019-03-18Q1911097024ND
2019-03-18Q1911097023ND
2019-03-18Q1911097022ND
2019-03-18Q1911097021ND
2019-05-09Q1923093020ND