Know Your Environment. Protect Your Health.

Thallium

Silverdale Water District 16

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020N/A00N/A
2021N/A00N/A
2022ND110ND
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
2018-09-04ND
2019-11-25ND
2022-07-254419132ND
2022-09-124364206ND
2022-09-124364208ND
2022-09-124364204ND
2022-09-124364207ND
2022-09-124364209ND
2022-09-124364205ND
2022-09-124364203ND
2022-09-124364210ND
2022-09-124364211ND
2022-12-084404386ND