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Management of Wells for Drinking Water. Possible Well Contaminants. Fertilizers Pesticides Septic systems Animal feed lots Leaking fuel storage tanks. Well Location. Locate wells uphill from: septic systems. animal feed lots. fertilized farm fields. fuel storage tanks.
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Possible Well Contaminants • Fertilizers • Pesticides • Septic systems • Animal feed lots • Leaking fuel storage tanks
Well Location • Locate wells uphill from: • septic systems. • animal feed lots. • fertilized farm fields. • fuel storage tanks. • Divert surface water away from the well.
Conditions Around the Well • Contamination of groundwater is more likely if soils are: • shallow (a few feet above bedrock). • highly porous (sandy or gravely). • Shallow soil means contaminants do not have far to travel to reach groundwater. • If bedrock is fractured water seeps rapidly. This can increase contamination.
Well Age • If your well is over 20 years old, have it inspected for defects. • Wells over 50 years old are more likely to be contaminated due to: • poor construction. • thinner casings that may be cracked and leaking lubricating oils.
Dug and Driven-Point Wells • Dug wells are: • Large diameter holes that are usually more than 2 feet wide. • Shallow and generally constructed by hand. • Driven-point wells are: • Installed only in areas with loose soil. • Constructed by driving lengths of pipe into the ground.
Drilled Wells • Are common in Kentucky. • Are the least likely to become contaminated of the three types of wells. • Have set construction standards in Kentucky. • Must be drilled by a certified well driller.
Well Casing and Cap • Casing should be: • 12 inches or more above the surface and 1-2 feet above flood level. • Inspected periodically for cracks. • Cap should be: • Firmly attached to casing and have a vent to allow air to enter. • Tightly attached to the vent, with the vent facing the ground and properly screened.
Well Inspection • Have your well inspected by a qualified well driller every 10 to 15 years. • Regular inspections ensure a safe water supply. • Detailed records of maintenance visits and inspections can be valuable assets for repairs. • Retain information about construction of your well.
Water Testing • Water testing is important because: • It monitors water quality and identifies possible health risks. • Most contaminants cannot be seen. • Test well water at least once a year for: • Bacteria. • Nitrates. • Total dissolved solids. • pH.
Unused Wells • Need to be closed because they: • Provide a direct channel for waterborne pollutants to reach groundwater. • Pose a hazard to small children. • Are potential health hazards to your family. • Can be expensive to fix if problems occur. • By Kentucky law, a licensed, registered well driller must be hired to close any wells.