The most likely reason your water well is pumping sand is due to incorrect well pump placement, specifically being too low within the well. Here's a more detailed breakdown:
Reasons for Sand Pumping in Wells
Several factors can contribute to a well pumping sand:
-
Improper Pump Depth: This is the most common cause. If the pump is set too low, it can draw water (and sand) directly from the bottom of the well.
-
Well Screen Problems: The well screen is designed to filter out sand and sediment. If it's damaged, corroded, or improperly sized, it will allow sand to enter the well.
-
Casing Issues: Cracks or holes in the well casing (the pipe that lines the well) can allow sand to seep into the water supply.
-
Overpumping: Pumping water at a rate faster than the well's recharge rate can create excessive drawdown and turbulence, pulling sand into the well.
-
Well Age: As wells age, the natural gravel pack around the well screen can deteriorate, leading to increased sand production.
Identifying and Addressing the Problem
Here's how to investigate and potentially resolve the issue:
-
Check Pump Depth: This is best done by a licensed well-service contractor. They can use specialized equipment to determine the pump's depth and ensure it's properly positioned.
-
Inspect the Well Screen and Casing: This also requires professional assessment. A contractor can use a downhole camera to inspect the well screen and casing for damage or corrosion.
-
Evaluate Pumping Rate: Determine if you're overpumping the well. Consider using a flow meter or consulting with a well professional to assess your water usage and well yield.
-
Consider Well Rehabilitation: If the well is old or has significant sand production, well rehabilitation techniques, such as surging or chemical treatment, may be necessary.
What to Do If Your Well is Pumping Sand
- Contact a Licensed Well-Service Contractor: This is crucial for accurate diagnosis and effective solutions.
- Avoid Overusing Water: Reduce your water consumption to minimize stress on the well.
- Install a Sand Separator: This device can filter out sand and sediment before it reaches your plumbing fixtures. While a sand separator is a good temporary solution, be sure to address the underlying problem.
Pumping sand is an indication that something is wrong with the well system, and it needs to be addressed as soon as possible to avoid further damage to your well and plumbing. A professional well service contractor can help diagnose and correct the underlying cause.
