Otherwise, the bacteria will reoccur. How Shock Chlorination Works Shock chlorination involves introducing a strong chlorine solution into the water source and plumbing system and letting it disinfect the system for 12 to 24 hours. You can use regular household bleach that contains 5.25 percent sodium hypochlorite, which kills bacteria and certain viruses. Shock chlorination is recommended after a new well is constructed and installed, any time a well is opened for repairs, or if floodwater has entered a well. Be sure to store enough fresh water to last 12 to 24 hours while the well and water system are being disinfected.
Shock chlorination is recommended for all bacterial contamination.
Also, use an in-line cartridge water filter to remove iron or sulfur bacteria that may dislodge from plumbing lines during chlorination. Be sure to change the filter regularly to keep it from becoming clogged. How To Use Shock Chlorination To use shock chlorination effectively, you must introduce the chlorine solution directly into the water supply. Depending on how your well is constructed, some pipe disconnections or mechanical adjustments may be needed. If you need help doing this, contact a licensed well driller or plumber in your area.