One has to CLEAN those dispenser coolers for the jugs ...

http://www.drinkmorewater.com/techno...n-water-cooler

I worked at a place once that never did (but I didn't know that until after I got sick and asked). I only had one drink from that cooler and was sick within 2 hrs with a massive headache! (and I rarely if ever get headaches so I listen to myself when I do). If your dispenser is in sunlight for part of the day, the algae will grow in it.

I put bottled water in the cats dispenser upNorth (which I clean out with bleach each season) and algae grows in it anyway. I think it is coming from the bottled water.

Take a clean dish and put some of your water in it on a window sill and see if algae grows in it. That would tell you not to use that water even if new.

The algae blooms vary from year to year...some heavy and some light. They are stimulated by phosphate run off from agriculture and lawns and gardening. If you delve deeply into the online sites about this subject you will find brain damage and other horrible things besides skin reactions. The blooms upNorth where we are start in late July and August, when the northern cold/cool water warms up.

Some of the local UPers upNorth, rinse off with a very dilute bleach solution after going swimming in the lake.

Boiling does not help... it actually bursts the algae and forces a larger dump of the toxin, than would be present if the cells remained intact.