Thallium

City of Clinton

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2013	N/A	0	N/A
2014	N/A	0	N/A
2015	ND	9	ND
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	ND	10	ND
2019	ND	2	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2015-03-11	150311-012IN	ND
2015-03-11	150311-011IN	ND
2015-03-11	150311-010IN	ND
2015-03-11	150311-009IN	ND
2015-03-11	150311-008IN	ND
2015-03-11	150311-007IN	ND
2015-03-11	150311-006IN	ND
2015-03-11	150311-005IN	ND
2015-03-11	150311-004IN	ND
2018-08-29	180830-008IN	ND
2018-08-29	180830-009IN	ND
2018-08-29	180830-007IN	ND
2018-08-29	180830-006IN	ND
2018-08-29	180830-005IN	ND
2018-08-29	180830-004IN	ND
2018-08-29	180830-003IN	ND
2018-08-29	180830-002IN	ND
2018-08-29	180830-001IN	ND
2018-10-15	181016-003IN	ND
2019-01-22	190123-018IN	ND
2019-10-16	191017-002IN	ND