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Well Water Problems

Sand and Grit Coming From Your Well

Sand and grit usually come from the aquifer, a worn or failing well screen, or a pump set too low. It is mostly an aesthetic and equipment problem, but a licensed contractor should evaluate the well.

By Know Your Well Water Editorial TeamReviewed October 29, 20262 min read

Quick Answer

Sand in well water usually means the well is drawing in aquifer material. Common causes are a worn or broken well screen, a pump set too deep or too powerful for the formation, or a new well that has not fully developed. Sand is largely an equipment and aesthetic issue, but it wears out pumps, valves, and appliances, so have a licensed well contractor evaluate the cause.

Why sand shows up

  • A damaged, corroded, or improperly sized well screen letting fine material through.
  • A pump placed too low in the well, drawing sediment from the bottom.
  • A pump that is too large for the aquifer, pulling in sand at high flow.
  • A newly drilled or recently serviced well that still needs to settle and develop.
  • Shifting sediment after drought, heavy pumping, or seismic activity.

Sand damages equipment

Abrasive sand grinds down pump components, pressure tanks, valves, and faucet cartridges. Ignoring it can lead to a premature pump failure, so address the source rather than only filtering symptoms.

What you can check safely

  1. 1Collect water in a clear glass and let it settle to see whether the grit is sand, silt, or rust flakes.
  2. 2Note whether sand appears constantly or only when demand is high (several fixtures running).
  3. 3Check whether a whole-house sediment filter is present and overdue for a change.
  4. 4Record when the problem started and any recent well or pump work.

When to call a licensed professional

Diagnosing the screen, pump depth, and pump sizing requires pulling and inspecting equipment, which is work for a licensed well or pump contractor. They can recommend a screen repair, a pump adjustment, or a sediment separator sized to your flow.

Still test the water

Sand itself is mostly an aesthetic and mechanical issue, but any change in your water is a good reason to run a baseline bacteria test, since clear water is never proof of safety.

Frequently asked questions

Will a sediment filter solve sand in my water?
A filter or sediment separator can protect appliances, but it does not fix the underlying well problem and filters will clog quickly if a lot of sand is entering. Have a contractor find the source.

Sources & references

This guide is documentary research and general information, not a laboratory analysis or professional assessment of your specific well. See our disclaimer.