Home Fixer Guide

This hub covers black specks, grit, sand, or other particles coming out of your tap water. You might see flecks in a sink, debris caught in aerators, or sediment collecting in toilets, dishwashers, or washing machines.

These problems often start after a shutoff, pressure change, pipe work, curb stop activity, a water heater flush, or a smart shutoff event. Sometimes particles show up only on the hot side or only upstairs.

Use the groups below to match what the particles look like and what changed recently, then open the closest article title. For related topics, see the sub-category hub: Water Contamination, Taste & Odor.

Black specks and flecks

Dark or black particles visible at faucets, in sinks, or in shower drains are grouped here.

Black particles in sink water

How to recognize common black flecks and where they often come from, including ORP and carbon breakdown in fixtures. Focus is on identification rather than repair steps.
Black flecks after city shutoff

What to expect when dark particles appear after a municipal shutoff and why older pipeline deposits can dislodge into your plumbing.
Black flecks after pressure change

Why pressure fluctuations can mobilize deposits and produce black specks at multiple fixtures, and how to narrow down the likely source.
Black specks only on hot side

Common causes when particles appear only from hot taps, including water heater or hot-side corrosion and trapped debris upstream of the heater.
Black specks from showerhead

What black flecks in shower flow usually indicate, how they relate to showerhead internals or supply piping, and where they commonly collect.

Grit, sand, and debris in the water

Coarser particles, sand-like grit, or hard debris that feel abrasive or settle quickly.

Grit coming out of faucets

How to distinguish sand or grit from other particle types, typical municipal or construction-related causes, and where grit tends to show up first.
Sand in water after pipe replacement

Why pipe replacement or trench work can introduce sand into service lines, and what to check before assuming a long-term problem.
Debris after turning main back on

Expectations when main water is recharged and why loose material in the mains or service can enter your home briefly after restoration.

Clogging and where sediment collects

Locations and symptoms where sediment causes reduced flow, screen clogging, or appliance issues.

Sediment clogging aerators suddenly

Typical patterns when aerators or faucet screens foul quickly and what that suggests about particle size and supply-side activity.
Particles in toilet tank

Why sediment sometimes shows up in toilet fill valves and tanks, and how toilet observations can help locate a supply or fixture issue.
Sediment in dishwasher supply

How particles in the dishwasher line indicate upstream debris and where to inspect supply screens and valves for trapped material.

Appliance and outdoor-only sediment

When grit appears primarily with specific appliances or at exterior spigots.

Grit in washing machine water

Why washing machines may show deposited sand or grit and how appliance location and supply routing influence where particles appear.
Grit from outdoor spigot

Common causes for coarse material at hose bibs, including service line deposits and irrigation system interactions, with signs that the issue is exterior-only.

After specific events or changes

Particles that begin after maintenance events, smart shutoffs, or long idle periods.

Sediment after water heater flush

Why a water heater flush can dislodge sediment and how that may temporarily introduce particles into hot or mixed plumbing.
Sediment after curb stop use

How activity at the curb stop or meter can release deposits into the service line and what to expect when flow restarts.
Particles after smart shutoff triggers

Why automatic shutoff devices can coincide with particle events and how timing of the trigger helps pinpoint potential sources.
Sediment after long periods of no use

Why stagnation can allow solids to settle or break down and produce visible sediment when fixtures are first used again.

Upstairs-only or area-specific particles

When particles are limited to certain floors or zones, indicating location-specific causes.

Particles only in upstairs fixtures

What it means when only upstairs fixtures show particles, including trapped debris in branch lines or differences in pressure and piping runs.

Black Specks, Sediment, or Grit in Water