Disinfection Procedure

  • Mix 2 quarts bleach in 10 gallons of water; pour into well.
  • Connect a garden hose to a nearby faucet and wash down the inside of the well.
  • Open each faucet and let the water run until a strong chlorine odor is detected, then turn it off and go to the next one. Don't forget outdoor faucets and hydrants. Drain the water heater and let it refill with chlorinated water. If a strong odor is not detected at all outlets, add more chlorine to the well.(if you have and impaired sense of smell, use chlorine test strips sold with swimming pool supplies to detect chlorine at each outlet.)
  • Flush the toilets.
  • Mix an additional 2 quarts bleach in 10 gallons of water. Pour it into the well without pumping.
  • Allow chlorinated water to stand in the well and pipes for at least 8 hours (preferably 12 to 24 hours).
  • Run water from outdoor faucets to waste (away from desirable vegetation) until the chlorine odor is slight or not detected at each faucet. Then run indoor faucets until there is no chlorine odor. Minimize the amount of chlorinated water flowing into a septic tank.

How To Shock a Well?

List Price: $39

Shock Chlorinate & Sanitize Wells To Kill Coliform Bacteria, Sulfur Bacteria, Iron Bacteria & Odors

iron filter

 CAUTION: While shock chlorination may correct bacteria and/or odor problems in wells and piping systems in the short term, it does not correct the source of the bacterial contamination. If bacteria are entering the well from a septic tank or other source, the bacteria will become present again after the well has been sanitized. Try to identify the source of the bacteria, protect the well from contamination. CAUTION: Shock chlorinating your well may cause the water to turn a dark color and the chlorine may clean the Well shaft and pipe of iron and sediment. The water may initially be very high in sludge and rust and cause damage to pipes and fixtures. Do not run water high in rust and sediment into water softeners, interior fixtures, water heaters, etc.

Disinfects well water and prolongs the pump's life. Using Well Safe twice a year will help keep wells free from iron and bacteria build-up, improving the smell and taste of the water. A well should be sanitized if it has been contaminated or disturbed as a result of repairs. Well Safe pellets and granules are designed to help purify and eliminate harmful bacteria in storage tanks, well casings, fixtures, and pipes.

How to shock a well?

iron filter

Drilled, Driven & Bored Wells:

Which Type of Bleach To Use

CALL 855-909-9544

Shock chlorinate & sanitize your well & home piping system whenever:

• A new well has been constructed

• Anytime a well is opened for repairs

• Flood water has entered a well

• A new holding tank, pump or pressure tank has been installed

• A new pipeline or other piping or plumbing work has been done

• Tests indicate the presence of coliform bacteria

• Odors or slime caused by iron or sulfur bacteria are present

Well Safe Sanitizer

how to shock a well

How To Shock a Well?

iron filter

How To Shock a Well?

Have Questions?  One of Our Trained Experts can Help you!

well safe
iron filter

How to shock a well?

How To Shock a Well?


how to shock a well?

Sale Price $25.00

Use dry pellets or powdered bleach certified for potable water. A second option is to use liquid pool chlorine (10% to 12% sodium hypochlorite) which works also works fine. The worst option is to use household laundry bleach, which typically contains other unwanted chemicals besides chlorine. Never use pool pellets, which are not designed for potable water. The best way to shock chlorinate a well is to use a combination of dry pellets and dry chlorine granules mixed with water. The dry pellets drop down past the pump and ensure the entire well is sanitized. In addition, liquid bleach made from potable water grade powdered bleach can be poured into the well and then recirculated until the chlorinated water has made its way through the well pipe, pressure tank, and pipes in the house if desired.


Run the pump until water is as free from turbidity as possible. Pour a 100 ppm available chlorine sanitizing solution into the well. This solution can be made by thoroughly mixing 1 ounce of this product into 40 gallons of water. Add 5 to 10 gallons of clean, chlorinated water to the well in order to force the sanitizer into the rock formation. Wash the exterior of the pump cylinder with sanitizer. Drop pipeline into well, start the pump and pump water until the strong odor of chlorine in water is noted. Stop the pump and wait at least 24 hours. After 24 hours flush well until all traces of chlorine have been removed from the water. Deep wells with high water levels may necessitate the use of special methods for the introduction of the sanitizer into the well. Consult your local Health Department for further details. Flowing Artesian Wells - Artesian wells generally do not require disinfection. If analyses indicate persistent contamination, the well should be disinfected. Consult your local Health Department for further details.

Only use chlorine for water

intended to drink.

No pool or laundry sanitizer 

Bypass the water softener, other filters, or purification equipment. Remove the cap or seal from the casing and, if possible, measure the depth of water in the well. In some instances removing the seal to measure the water can be a difficult task. It may be easier to estimate well and water depth from Well logs or other records. As a general rule, it is better to use too much sanitizer than too little. If too much sanitizer is used, it will simply take longer for the taste and odor to leave the system.
Use a pipe to get by any restriction in the well, a 10’ length of 3/4” PVC is usually ideal. (If it is not possible to remove the well cap, remove the vent or sanitation plug.)
Drop one tablet into the well and listen to hear if the tablet hits the water (you will hear a “plink” sound). If the tablet hits the water, drop the remaining determined number of sanitizing tablets needed into the well.
Mix the determined amount of granules needed in a clean, plastic five (5) gallon container of water and pour the solution down the well to sanitize the upper portion of the well. Do not add water to the product – Add product to water.
It is necessary to circulate the water in the well to mix the sanitizer thoroughly throughout the entire water system. Connect a hose to an outside silcock that is located after the pressure tank and run water back down the well (this also rinses upper portion of well). After approximately 15 minutes of circulating the water, a strong chlorine odor should be present; if not, repeat steps 4 and 5. Run water through service lines until you detect chlorine odor at all taps.
Allow the sanitized water to stand in the system for at least six (6) hours, although overnight is preferred. Open an outside faucet and flush system until water runs chlorine-free (no chlorine smell is detected). Repeat flush operation on each faucet in the system. Do not run high levels of chlorine into a septic system.
Note A) Chlorine may make the water run colored, and iron deposits, slime, and organic material may break loose and plug pump screens.

google-site-verification: googlef1617964f32c8bc4.html