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EWG's Tap Water Database — 2021 UPDATE

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Thallium

Town of Gilbert

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

 

47

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND10ND
2015ND10ND
2016ND100ND
2017ND10ND
2018ND170ND
2019ND170ND

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
2014-01-27201401270086IND
2015-01-28201501280356IND
2016-01-12201601120223IND
2016-01-19201601190321IND
2016-01-26201601260298IND
2016-02-08201602080053IND
2016-02-08201602080042IND
2016-03-02201603020441IND
2016-03-23201603230453IND
2016-04-07201604070686IND
2016-04-19201604190185IND
2016-05-31201605310460IND
2017-01-042017010408151ND
2018-01-16201801160489 IND
2018-01-16201801160478 IND
2018-01-16201801160477 IND
2018-01-24201801240891 IND
2018-01-24201801240738 IND
2018-01-24201801240730 IND
2018-01-29201801290255 IND
2018-01-29201801290249 IND
2018-01-29201801290172 IND
2018-02-26201802260220 IND
2018-02-27201802270449 IND
2018-03-20201803200269 IND
2018-03-20201803200261 IND
2018-03-21201803210471 IND
2018-05-17201805170725 IND
2018-05-29201805290454 IND
2018-06-13201806131020 IND
2019-01-092019010903741ND
2019-01-092019010903421ND
2019-01-092019010903471ND
2019-01-092019010903551ND
2019-01-092019010903691ND
2019-01-092019010903791ND
2019-01-09201901090384IND
2019-01-09201901090393IND
2019-01-09201901090396IND
2019-01-152019011502201ND
2019-02-062019020602301ND
2019-02-062019020602271ND
2019-02-062019020602161ND
2019-03-25201903250230IND
2019-03-252019032501821ND
2019-04-162019041604191ND
2019-04-292019042902961ND