Livewell

Contaminant

Thallium

A rare, highly toxic metal from industrial and mining sources.

What it is

Thallium enters waterways from coal combustion, smelting, and mining, and is readily taken up by fish. It is acutely toxic and, with chronic exposure, harms the nervous system, and can cause hair loss and other effects. Follow the meal limits shown and favor smaller, younger fish.

Cleaning and cooking will not help

Trimming, skinning, and cooking won't lower it — it's stored in the muscle. Reduce exposure by eating smaller, younger fish and fewer meals.

How to prepare it

  • Trimming and skinning won't help — this settles in the muscle you eat, not the fat.
  • Cooking doesn't remove it either; a fillet carries the same amount cooked or raw.
  • Eat smaller, younger fish — they carry less.
  • Follow the meal limits above and space your meals out across the month.

Waters with Thallium advisories

6 waters across 1 state.