Know Your Environment. Protect Your Health.

Thallium

Gurdon Waterworks

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND50ND
2020ND20ND
2021ND30ND
2022ND60ND
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
2018-04-24Y181150011ND
2018-04-24Y181150010ND
2019-01-23Y190240003ND
2019-04-30Y191220044ND
2019-04-30Y191220035ND
2019-09-24Y192690006ND
2019-12-10Y193460028ND
2020-05-12Y201350026ND
2020-05-12Y201350027ND
2021-04-05Y210980009ND
2021-04-05Y210980008ND
2021-05-10Y211330026ND
2022-02-07Y220410001ND
2022-05-04Y221250018ND
2022-05-04Y221250022ND
2022-06-13Y221670033ND
2022-07-11Y221950063ND
2022-10-03Y222790057ND
2023-02-13Y230470045ND
2023-05-08Y231310023ND
2023-05-08Y231310035ND