I am wondering why we have fine sand and silt in our well water after a power outage? We did use a little water while the power was out, and after the power returned, there was fine sand in our water for a few hours. The sand did disappear after running the water for a while. Is this a sign of a bad tank or screen issue? The few people I've asked told me it sounds like our well is compromised.

  • Details about your well? Does the pump live in the well or on the surface? Is there one pipe down the well or two?
    – Ecnerwal
    Commented Feb 23 at 0:49

1 Answer 1


At a guess, some insignificant amount of sand was suspended in the well pipe. Once pumping stopped, it settled to the bottom, and the came out in one noticeable "lump" when pumping restarted and the tank was pressurized.

The test is simple: let water flow a few minutes, take a glass-full of water, and let it stand. If the water is clear, or has only a few specks of sand on bottom, then no worry.

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