You can see itCommon on wells

Why is there sand or grit in my well water?

Grit or sand in well water usually means sediment getting past your well or pump, and a simple pre-filter often solves it. But a sudden change can be a sign your pump or well screen needs a look, so it’s worth ruling that out.

Health risk: Low, it’s a nuisance
Most common on: Wells, especially newer ones
Typical fix: A sediment filter

Narrow it down

When did the grit start?

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Likely reasons

Likely reasons for sand in well water

This is the usual order. Tap an answer above and we’ll re-sort it for your situation.

Sediment getting through
Most common
Sand and silt drawn up with the water, the everyday cause. It’s a clogging and appearance issue rather than a health one, and a sediment pre-filter sized to your water usually catches it before it reaches your taps.
A worn well screen or pump
Rule out if sudden
A sudden increase in sand, especially with lower pressure, can mean the well screen is worn or the pump is set too low and drawing sediment. A filter won’t fix this, it’ll just clog, so this one is a well-service check first.
A new well settling in
If the well is new
A freshly drilled or newly developed well commonly produces fine sand at first and clears on its own over days to weeks. If it hasn’t settled after that, the driller should check how the well was developed.

What this means

What this means for you

Changes with your answer above. Then two ways to know for sure.

Most of the time, grit in well water is just sediment getting past your system, and a properly sized pre-filter clears it. Two things are worth ruling out first, though, because a filter won’t fix them: a brand-new well often sheds sand until it settles, and a sudden onset can mean a worn well screen or a pump drawing too low. If the grit came with a drop in pressure, check those before buying a filter.

The stuff that matters most for your health (lead, nitrate, PFAS) has no smell, color, or taste at all. You can’t notice what you can’t sense, so a test is the only way to know. Two ways to start:

Start hereGround truth

Test the water from your own well

A certified lab test reads your exact well water, the only real way to know what’s in it and what to filter for.

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See what’s on record for your area

Use a test of your well water to check what’s in it. Area records describe the wider area, rather than your individual well.

Treating it

Choosing a filter for sediment

Choose treatment for the concerns in your water, using relevant water records or testing.

None qualify

No products currently qualify for a sediment pick here.

Nothing in our database has a sediment claim for an exact configuration we can verify.

Find a fit in Finder →More about sediment →

Decode· Sand or grit in the water

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Quick questions

The questions people ask next

Does sand mean my well pump or screen is damaged?

Not always, but it can. A sudden increase in sand, especially with lower water pressure, can mean the well screen is worn or the pump is set too low and drawing sediment. Steady, small amounts of grit are more often just sediment a filter can catch. If it started suddenly, have the pump and screen checked before relying on a filter.

Is a new well supposed to produce sand at first?

Often, yes. A freshly drilled or newly developed well commonly sheds fine sand and grit for a while as it settles, and it usually clears on its own over days to weeks. If it hasn’t settled after that, or the sand is coarse and heavy, it’s worth having the driller check the well’s development and screen.

Will a sediment filter fully solve gritty water?

For ordinary sediment, usually yes, sized to your water it catches the sand before it reaches your taps. But a filter only treats the symptom. If the grit is coming from a failing pump or screen, the filter will clog fast and the real problem continues, so rule those out first. Then a sediment filter keeps things clean.

Pages that often come up alongside this one.

These are likely causes based on what people commonly describe, a place to start, not a diagnosis, and not medical advice. For anything health-related, a certified lab test and your local health authority are the ones to trust.