Know Your Environment. Protect Your Health.

Thallium

Norwich Public Utilities

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND30ND
2020ND30ND
2021ND10ND
2022ND20ND
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 Lab ID Result
2018-08-20PH-0453-6304413IOC1ND
2018-08-20PH-0453-6304414IOC1ND
2019-08-29PH-0453-6305529IOC1ND
2019-08-29PH-0453-6305531IOC1ND
2019-09-19PH-0453-6305530IOC1ND
2020-06-10PH-0453-6306356IOC1ND
2020-06-10PH-0453-6306357IOC1ND
2020-06-10PH-0453-6306358IOC1ND
2021-05-24PH-0453-6307275IOC1ND
2022-01-13PH-0453-6307955IOC1ND
2022-11-21PH-0453-6307956IOC1ND
2023-11-14D3K1545-01IOCND
2023-11-14D3K1545-02IOCND