Know Your Environment. Protect Your Health.

Thallium

City of Rochester

NOTE: City of Rochester purchases water from North Central Texas Municipal Water Authority which is required to test for thallium. Sample information shown below was taken by North Central Texas Municipal 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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

NOTE: City of Rochester purchases water from North Central Texas Municipal Water Authority which is required to test for thallium. Sample information shown below was taken by North Central Texas Municipal Water Authority.

Date Lab ID Result
2018-02-13Q1806366003ND
2018-05-15AE28106ND
2018-05-15AE28110ND
2018-05-15AE28112ND
2019-03-07Q1909867006ND
2019-05-14Q1925812001ND
2019-05-14Q1925812002ND
2019-05-14Q1925812003ND
2020-03-17Q2011709013ND
2020-03-17Q2011709005ND
2020-03-17Q2011709004ND
2020-03-17Q2011709003ND
2021-03-01Q2105128006ND
2021-03-01Q2105128007ND
2021-05-18Q2112967012ND
2021-08-24Q2122978007ND
2022-03-02Q2207242004ND
2022-03-02Q2207242005ND
2022-09-07Q2226614011ND
2023-03-08Q2309188004ND
2023-05-16Q2318416008ND
2023-09-05Q2338005002ND