Know Your Environment. Protect Your Health.

Thallium

Mountain Regional Water Special Service District

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.

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND120ND
2020ND30ND
2021ND10ND
2022ND120ND
2023ND10ND

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 Result
2018-06-06ND
2018-06-20ND
2018-08-23ND
2018-09-05ND
2019-01-03ND
2019-01-03ND
2019-01-03ND
2019-01-03ND
2019-01-24ND
2019-01-24ND
2019-01-24ND
2019-02-25ND
2019-02-25ND
2019-02-25ND
2019-03-20ND
2019-11-14ND
2020-02-27ND
2020-07-14ND
2020-09-21ND
2021-12-08ND
2022-02-17ND
2022-02-17ND
2022-02-17ND
2022-02-17ND
2022-05-05ND
2022-05-05ND
2022-05-05ND
2022-08-04ND
2022-08-04ND
2022-08-04ND
2022-09-07ND
2022-12-07ND
2023-12-11ND