Know Your Environment. Protect Your Health.

Thallium

Colorado City Md

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0223 ppb32ND - 0.0480 ppb
2019ND20ND
20200.0510 ppb220.0400 ppb - 0.0620 ppb
2021ND20ND
20220.0820 ppb110.0820 ppb
2023ND20ND

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 Result
2018-01-170.0190 ppb
2018-01-17ND
2018-04-240.0480 ppb
2019-01-29ND
2019-01-29ND
2020-01-140.0400 ppb
2020-01-140.0620 ppb
2021-11-10ND
2021-11-10ND
2022-02-230.0820 ppb
2023-09-26ND
2023-10-02ND