Common Problems With Drilled Wells — What To Watch For?

Drilled wells can be plagued by issues such as contamination, casing failure, and reduced water production over time. Regular inspections and maintenance can help prevent or mitigate these problems. Poor drilling practices can lead to costly repairs or even render the well unusable.

Drilling and Construction Issues

When drilling a well, the casing and screen may be damaged during the excavation process. This can lead to contamination from surrounding rock or soil. To prevent this, drillers should use a casing that is at least 2 inches longer than the screen, and the screen should be centered within the casing. A cement grout should be used to fill the annulus between the casing and the surrounding rock. This helps to prevent groundwater contamination and structural integrity issues.

Water Quality and Yield Issues

Over time, the well may experience a decline in water production due to sediment buildup or mineral scaling. Regular water testing can help identify potential issues. To mitigate this, use a well with a sufficient drawdown (typically 10-20 feet) and consider installing a submersible pump with a variable speed controller. This can help reduce energy consumption and maintain optimal water flow.

Maintenance and Inspection

Regular inspections (at least annually) are crucial to identify potential issues before they become major problems. Look for signs of contamination, corrosion, or damage to the casing and screen. Consider hiring a certified well technician to inspect the well and provide recommendations for maintenance or repairs. Additionally, keep detailed records of well maintenance, testing, and repairs to ensure compliance with local regulations.