Thallium

Bi County WSC 1

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
2014	N/A	0	N/A
2015	ND	5	ND
2016	ND	6	ND
2017	ND	5	ND
2018	ND	5	ND
2019	ND	7	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
2015-02-05	Q1504623002	ND
2015-02-05	Q1504623001	ND
2015-02-05	Q1504623036	ND
2015-02-05	Q1504623021	ND
2015-04-16	Q1514410017	ND
2016-04-19	Q1615295013	ND
2016-04-19	Q1615295012	ND
2016-04-19	Q1615295020	ND
2016-10-06	Q1642553018	ND
2016-10-06	Q1642553017	ND
2016-10-06	Q1642553016	ND
2017-01-05	Q1700559027	ND
2017-01-05	Q1700559028	ND
2017-01-05	Q1700559005	ND
2017-03-29	Q1713282012	ND
2017-03-29	Q1713282011	ND
2018-01-09	Q1800903038	ND
2018-01-09	Q1800903037	ND
2018-01-09	Q1800903036	ND
2018-01-09	Q1800903035	ND
2018-01-09	Q1800903034	ND
2019-01-15	Q1902083025	ND
2019-01-15	Q1902083024	ND
2019-01-15	Q1902083023	ND
2019-01-15	Q1902083022	ND
2019-01-15	Q1902083021	ND
2019-01-15	Q1902083020	ND
2019-06-11	Q1934121007	ND