Iodine 131 has a half-life of 8.03 days. If it truly has 181x the allowable level, keep it in your refigerator for two months and it will have decayed to permissible levels.
No.
Not even close.
The activity level here is 20 Bq per liter. The Becquerel is a measure of radioactive activity that translates to a dose.
A banana’s activity level is 15 Bq.
Potassium decaying naturally in your body is about 4400 Bq.
Twenty Bq per liter may be 181 times some government standard, but it 181 times jack squat. There is no danger here, only media hype.
All I meant to say was (0.5)^(60/8.05) < 181.
What that has to do with the real world is not my concern.