Following cleaning and repair, allow the water level in the well to return to its normal position. Measure the turbidity and pH levels to check if chlorination will be effective. This can be done using simple hand held equipment. Never chlorinate turbid water because the suspended particles can protect the micro-organisms. Table 1 outlines why pH and turbidity are important and what can be done to ensure guideline levels are met.
If the turbidity of the well water is greater than 5NTU after the cleaning and rehabilitation stage, remove all water in the well once again and scrub the well lining with a strong concentration of bleach in water. Allow the well to refill with water and test turbidity levels again to ensure compliance.