Know Your Environment. Protect Your Health.

Thallium

Middletown Water Department

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND20ND
2023ND20ND

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
2018-03-01IOC1 200489001ND
2018-04-16IOC1 200492152ND
2019-05-13IOC1 200531892ND
2019-05-21IOC1 200533082ND
2020-05-06IOC1 200574724ND
2020-05-14IOC1 200575834ND
2021-03-30IOC1 200611335ND
2021-03-30IOC1 200611336ND
2022-05-11E300182524 300182533ND
2022-05-11E300182526 300182546ND
2023-06-23E300370712 300370715ND
2023-06-23E300370718 300370721ND