Know Your Environment. Protect Your Health.

Thallium

Mccoll, Town of

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20190.260 ppb21ND - 0.520 ppb
20200.405 ppb21ND - 0.810 ppb
2021N/A00N/A
2022N/A00N/A
20230.285 ppb21ND - 0.570 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2019-02-27AE26444ND
2019-02-27AE264450.520 ppb
2020-02-04AE43956ND
2020-02-04AE439580.810 ppb
2023-11-15AF115860.570 ppb
2023-11-15AF11587ND