Know Your Environment. Protect Your Health.

Thallium

North Penn Water Authority

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND130ND
2019N/A00N/A
2020N/A00N/A
2021ND120ND
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-01-082288413002ND
2018-01-082288413012ND
2018-01-082288413011ND
2018-01-082288413010ND
2018-01-082288413009ND
2018-01-082288413008ND
2018-01-082288413007ND
2018-01-082288413005ND
2018-01-082288413004ND
2018-01-082288413003ND
2018-01-082288413001ND
2018-01-082288413006ND
2018-06-042318792001ND
2021-01-2023713122.00ND
2021-01-2023713177.00ND
2021-01-2023713155.00ND
2021-01-2023713133.00ND
2021-01-2023713199.00ND
2021-01-2023713144.00ND
2021-01-2023713188.00ND
2021-01-2023713210.00ND
2021-01-2023713166.00ND
2021-05-0524438633.00ND
2021-08-0225023352.00ND
2021-10-1925405322.00ND