Know Your Environment. Protect Your Health.

Thallium

Clark Public Utilities

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021ND30ND
2022ND140ND
2023ND30ND

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
2021-06-294136308ND
2021-06-294136309ND
2021-08-024171193ND
2022-03-314266325ND
2022-07-074329454ND
2022-07-074329453ND
2022-07-074329452ND
2022-07-284328491ND
2022-07-284329448ND
2022-08-034329441ND
2022-08-034329440ND
2022-08-034328492ND
2022-08-044329468ND
2022-08-044329461ND
2022-08-044328488ND
2022-08-044329471ND
2022-08-164364181ND
2023-04-064439682ND
2023-06-014474461ND
2023-09-194531983ND