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EWG's Tap Water Database — 2021 UPDATE

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Thallium

Prescott Valley WD Upper

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

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016ND60ND
2017N/A00N/A
2018ND40ND
2019ND150ND

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
2016-02-09201602100057IND
2016-02-10201602110035IND
2016-02-10201602110034IND
2016-02-10201602110033IND
2016-02-10201602110032IND
2016-02-10201602110031IND
2018-05-09201805100265IND
2018-05-09201805100264IND
2018-05-09201805100263IND
2018-05-09201805100261IND
2019-02-05201902060081IND
2019-02-05201902060083IND
2019-02-05201902060082IND
2019-02-05201902060080IND
2019-02-05201902060079IND
2019-02-05201902060078IND
2019-02-06201902070484IND
2019-02-06201902070483IND
2019-02-06201902070482IND
2019-02-06201902070481IND
2019-02-06201902070480IND
2019-05-07201905080065IND
2019-06-1919F2188-01ND
2019-06-24201906250033IND
2019-09-3019J0031-01ND