"Each Potable Aqua tablet contains 20 milligrams of Tetraglycine Hydroperiodide (TGHP), which liberates 8 milligrams (ppm) of titratable iodine. Dissolving Potable Aqua tablets in water releases the iodine bound in the TGHP molecule.

When dissolved, both diatomic iodine (I2) and hypoiodous acid (HIO) are released. Because the tablets contain a buffer, the treated water is maintained at acidic conditions with an approximate pH level of 5.5. Diatomic iodine is more abundant than hypoiodous acid. This mixture provides adequate disinfection of most waters.

Chemical reaction rates, and consequently germicidal effects, are subject to variables such as water temperature and level of contamination in the water. For this reason, two tablets of Potable Aqua and a 30-minute waiting period are required before drinking the water. The iodine works by penetrating the cell wall of the microorganism, therefore rendering it inactive."


I doubt it would hurt you to double the dose. Iodine is important to the thyroid gland, but the best treatment for radiation exposure (which messes up the thyroid first) is to give you an overdose of iodine.

In fact, people like me that live near a nuke plant have an emergency store of iodine pills issued by the nuke company, that we are supposed to take if there is an incident.

I wouldn't take too much Iodine on a daily basis, but in a survival situation? Load it up. I doubt you could overdose on it, particularly with the product above.

This is assuming you are using MicroPur tablets, and not a tablet that is based on a chlorine base, those are poison.

I don't recommend. "just boiling" as in a survival situation, you loose 1/3 of the water in the boiling process, and you might not have the hardware to boil water.

I'd only boil water for survival, well if I didn't have any other way to get water.

Best,
JB