If shocking fails, you’ve got a recurring issue. This is the “Groundhog Day” of well problems. The coliform keeps coming back because something is letting surface water sneak in. You’re now a detective, and your magnifying glass is a flashlight. Walk outside and eyeball your well. Does the cap fit tightly? Are there cracks in the concrete casing? Is the ground sloping toward the well instead of away from it? That’s like inviting rain to slide right down into your drinking glass.
I once helped a friend who couldn’t figure out why his water kept failing. Turns out, the well cap was homemade—a plastic garbage bag secured with a bungee cord. He called it “redneck engineering.” I called it “a bacteria buffet.” Fixing the cap and resealing the casing solved everything. Sometimes the answer is stupidly simple, like that missing sock in the laundry—just look under the dresser.
How to Treat and Eliminate Coliform Bacteria in Well Water
Also, check for surface runoff. If your well is downhill from a compost pile, a septic drain field, or that patch of grass where the dog “waters” the flowers, you’ve got a problem. Moving the pile or adding a berm to divert water can make a huge difference. It’s like moving your picnic blanket away from the ant hill—logical, but you had to think of it first.
