Why Is My Water Cloudy or Full of Sand?
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Three different causes, and they’re easy to tell apart once you know what to look for.
Fill a glass and let it stand.
If it clears from the bottom up within a minute or two, that’s air. Tiny bubbles coming out of solution, usually after work on a line nearby or after the pump has run dry. Harmless, and it sorts itself out.
If it clears from the top down and leaves grit on the bottom, that’s sediment. Sand, silt or scale travelling through the line.
If it doesn’t clear at all, that’s fine suspended solids, and it needs filtration.
On city water, sediment usually isn’t coming from the plant. It gets picked up in older distribution lines or shaken loose from your own plumbing, and it turns up worst for a day or two after the county works on a main nearby.
On a well, sand is the well itself. Screen, casing or pump depth, and that’s a well contractor’s job before it’s a filtration job.
A sediment filter will catch sand, and it'll clog constantly doing it.
SW Florida Water
Sand On A Well Is Not A Filter Problem
If you’re pulling actual sand out of a well, a filter is treating the symptom.
Sand gets in through a failing well screen, a cracked casing, or a pump set too close to the bottom of the borehole. It’ll chew through the pump, wear valves and score fixtures on the way through.
A sediment filter will catch it, and it’ll clog constantly doing it.
Worth getting the well looked at before you spend money filtering what shouldn’t be there in the first place. We’ll tell you that rather than sell you a cartridge you’ll be changing every month.
02
The Glass Test
Clears bottom up in a minute? Air. Clears top down with grit? Sediment.
What Filtration Actually Handles
Sediment filtration is sized by particle size and by how much of it there is.
A spin-down filter handles coarse material and can be flushed without replacing anything, which suits wells carrying fine sand.
Cartridge filters catch finer material but need changing on a schedule, and the interval depends entirely on how much is in the water.
Whole-home sediment filtration goes on the main line before everything else, so it protects the softener and any other equipment downstream.
That’s the part people miss. Sediment reaching a softener wears it out early, so the filter earns its money twice.
- Air clears bottom up, sediment clears top down
- Sand on a well is a well problem first
- Sediment filtration protects the softener behind it
Frequently Asked Questions About Why Is My Water Cloudy or Full of Sand?
Why does my water go cloudy after they work on the line?
Air and disturbed sediment, both. Work on a main changes the flow and the pressure, which pulls material off the inside of the pipe. It usually settles down within a day or two.
Is cloudy water safe to drink?
Air is harmless. Sediment is usually an aesthetic problem rather than a health one, but it's worth knowing what the particles actually are. If it's persistent and you're on a well, get it tested.
How often do sediment filters need changing?
Depends entirely on how much is in your water. Some houses go months, some go weeks. If you're changing one every few weeks, that's a sign the sediment needs handling upstream rather than filtered.
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