Thallium

Desoto PWS

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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	5	ND
2015	ND	4	ND
2016	ND	4	ND
2017	ND	5	ND
2018	ND	4	ND
2019	ND	4	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
2014-01-29	AC17012	ND
2014-04-23	AC21895	ND
2014-07-22	AC29360	ND
2014-08-20	AC33540	ND
2014-10-28	AC36704	ND
2015-01-28	AC40669	ND
2015-04-29	AC45272	ND
2015-07-29	AC54721	ND
2015-10-27	AC61455	ND
2016-01-27	AC65253	ND
2016-04-27	AC69627	ND
2016-08-02	AC80099	ND
2016-10-06	AC85491	ND
2017-01-29	AC89320	ND
2017-04-17	AC94660	ND
2017-07-17	AD01721	ND
2017-08-14	AD03710	ND
2017-10-23	AD08058	ND
2018-01-29	AD11506	ND
2018-04-24	AD18230	ND
2018-07-18	AD29472	ND
2018-10-17	AD34621	ND
2019-01-08	AD37930	ND
2019-04-17	AD46361	ND
2019-07-24	AD52138	ND
2019-10-22	AD56916	ND