Thallium is a metal found in natural deposits such as ores containing other elements. The major sources of thallium in drinking water are leaching from ore-processing sites; and discharge from electronics, glass, and drug factories.
Some people who drink water containing thallium well in excess of the maximum contaminant level (MCL) for many years could experience hair loss, changes in their blood, or problems with their kidneys, intestines, or liver problems.
MCL ADVISORY - ACTION IS HIGHLY RECOMMENDED
Thallium levels were detected in your water sample to exceed the maximum contaminant level (MCL).
ACTION IS OPTIONAL
Thallium levels were detected in your water sample but do not exceed the maximum contaminant level.
- Ohio Department of Health - Private Water Systems Program - Water Quality
- USEPA - Water: Drinking Water Contaminants - Drinking Water Contaminants
- USEPA - Water: Basic Information about Regulated Drinking Water Contaminants - Basic Information about Thallium in Drinking Water
- ATSDR - Toxic Substances Portal - Thallium
- ATSDR ToxFAQs Fact Sheet - Thallium