I should start by saying use only regular chlorine bleach. Do not use concentrated bleach, scented bleach or color safe bleach. These types of bleach contain additives which are hazardous for plumbing systems.
My family has had private wells for over 100 years. I remember my grandfather and dad sanitizing the wells.
They would start by filling about 10 milk jugs and water coolers for drinking water and a 100 gallon livestock tank with water for washing and flushing.
Opening the top of the well and running water from the garden hose from the pump they would dump in 2 gallons of regular chlorine bleach. The water from the hose would mix it in the ground near the well and draw it into the pressure tank and the plumbing. They would close off the top of the well and let the water run through all the faucets until they smelled the chlorine.
They then turned off the power to the well pump and let it sit for 24 hours. After 24 hours they drained the plumbing and the pressure tank. Then they would turn the well pump back on and let it fill the pressure tank then flush any chlorine water residue from from the faucets. Once the chlorine smell was gone they were done.
Since my house has a private well I follow this same procedure every summer. The only difference is I go to our camper for a couple of days instead of filling every container with water for drinking, washing and flushing the toilet.
For those who have a private well and wish to sanitize it you need to flush the chlorine off the pipe and wiring as you dump the chlorine in. If not the undiluted chlorine bleach will deteriorate the wires and pipes.
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989
Car Shredder Op/Tech, Scrap Metal Recycling - retired
Everyone gets confused at some time, some are better at hiding it than others.