Should You Shock Chlorinate a Well After Coliform Positive?

What to do next

• Use bottled water or another safe source for drinking until retesting is clear.
• Inspect the well cap, casing, sanitary seal, pressure tank, plumbing, and nearby drainage.
• Follow local health department or extension guidance for shock chlorination dose, contact time, flushing, and safety.
• Retest for total coliform and E. coli after chlorine has cleared, then retest again if bacteria returns.

Common questions