Thallium

City of Upland

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	ND	11	ND
2015	N/A	0	N/A
2016	N/A	0	N/A
2017	ND	9	ND
2018	N/A	0	N/A
2019	N/A	0	N/A

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
2014-09-25	9590-021-1000	ND
2014-09-25	9590-048-0920	ND
2014-09-25	9590-045-1235	ND
2014-09-25	9590-040-0930	ND
2014-09-25	9590-038-0850	ND
2014-09-25	9590-036-0750	ND
2014-09-25	9590-026-1000	ND
2014-09-25	9590-024-1240	ND
2014-09-25	9590-023-1027	ND
2014-10-07	9590-004-0812	ND
2014-10-07	9590-047-0920	ND
2017-02-02	9590-001-1110	ND
2017-08-21	9590-036-0815	ND
2017-08-23	9590-045-0815	ND
2017-08-23	9590-040-0945	ND
2017-08-23	9590-038-1055	ND
2017-08-23	9590-026-1215	ND
2017-08-23	9590-024-0915	ND
2017-08-23	9590-023-1110	ND
2017-08-23	9590-021-0831	ND