Welding ground...don't do this!

Mmmm... Natures little helpers, wastewater plant midge flies and their larvae known as bloodworms. Insects and plants (And Sometimes Fish, Read About Tilapia In Fish Farms!) do a wonderful job of cleaning waste out of water. Working wastewater will also put your acquired immunity through the roof. It takes a whole different mentality to do that whole "Wastewater Plant Maintenance Diving" though!