Why your water might look cloudy and what to do

Cloudy tap water can be alarming, but a hazy or milky appearance is often caused by tiny air bubbles rather than unsafe water. This is especially common when water pressure changes, a main is repaired, or water has been sitting in household plumbing.

The first step is to observe the color, location, and duration of the problem. Water that clears from the bottom of a glass upward is usually aerated. Water that stays discolored, has an unusual odor, or affects several nearby properties deserves prompt attention.

A simple check can help distinguish a harmless appearance change from a plumbing concern. Run only the cold water, collect it in a clear glass, and let it stand for a few minutes. Avoid drinking water that looks persistently brown, yellow, gray, or otherwise unusual until the source is understood.

When cloudy water is just trapped air

White or bluish water that clears within seconds or a few minutes is commonly caused by dissolved air. Pressure changes can release that air into very small bubbles, making the water look foggy. The bubbles usually rise and disappear from the top of the glass downward.

This can happen after utility work, a temporary interruption, hydrant use, or changes in building plumbing. It may also appear at one faucet because of a clogged or poorly functioning aerator. If the water becomes clear without leaving particles or sediment, the appearance is generally associated with air rather than suspended material.

Run the cold tap for a short time and see whether the water returns to normal. Do not waste large quantities unnecessarily; a brief flush is usually enough to check whether the issue is limited to the fixture.

Signs that need closer attention

Cloudiness that remains after the water sits may indicate sediment, corrosion, or particles from a household pipe or water heater. Brown, orange, or reddish water can be associated with iron-containing deposits, while a gray or black appearance may come from plumbing components or disturbed sediment. Color alone cannot identify the cause.

Check more than one cold-water faucet. If only one fixture is affected, remove and rinse its aerator if you are comfortable doing so. If every faucet has the same problem, especially in several buildings, the issue may be connected to the service line or the public water system.

An unusual smell, oily sheen, visible debris, or a sudden change in taste should be treated cautiously. Use an alternative source for drinking and cooking while you contact the City of Susanville Public Works Department or follow any official advisory. Boiling does not remove every possible chemical or physical contaminant, so do not rely on boiling unless public health officials specifically direct it.

A quick check inside your home

Start with cold water because hot water can pick up sediment from a water heater. Compare the first flow with water after the tap has run briefly. If the water clears after flushing, the problem may be localized to the building’s service line or interior plumbing.

If the issue returns, inspect faucet aerators and consider whether recent work occurred on the property. Construction, a new appliance, plumbing repairs, or a pressure change can disturb material inside pipes. Older fixtures and galvanized plumbing may also contribute particles or discoloration.

Your meter can provide another useful clue when investigating household plumbing. After all water use is stopped, watch the meter for movement; the city’s water meter guide explains how to check for leaks and interpret meter activity. A leak will not usually cause cloudy water by itself, but it can draw in contaminants if a line is damaged or depressurized.

What the appearance can suggest

The pattern matters as much as the color. The following guide is a starting point, not a substitute for an official water-quality assessment.

What you see	Common explanation	Useful first step
Milky white water that clears quickly	Air bubbles from pressure or flow changes	Let a glass stand and run the cold tap briefly
Cloudiness only at one faucet	Dirty aerator or fixture issue	Remove, rinse, and reinstall the aerator
Brown, orange, or rusty water	Disturbed sediment or pipe corrosion	Avoid drinking until it clears and report persistent discoloration
Gray or black particles	Plumbing material, washer, or sediment	Stop using the affected fixture and request advice
Cloudiness in hot water only	Water-heater sediment or equipment issue	Compare with cold water and have the heater checked
Persistent haze throughout the property	Building plumbing or broader service concern	Contact Public Works and document when it occurs

Steps for safe troubleshooting

Use a clean, clear container and record when the problem began, which faucets are affected, and whether cold or hot water changes the appearance. A photograph can help staff understand the issue, particularly if the water clears before an inspection is possible.

Flush cold water for a limited period, but do not repeatedly run water for long periods if the appearance does not improve. Clean removable aerators, check whether neighbors are experiencing the same condition, and avoid using discolored water for drinking, cooking, ice, or brushing teeth until you receive appropriate guidance.

Do not open a hydrant or alter municipal equipment to flush a line. If you suspect a broken service line, loss of pressure, flooding, or another urgent infrastructure problem, report it through the city’s established channels. Current utility information, department contacts, conservation guidance, and service notices are available through the Public Works website.

When to contact the city or a plumber

Contact Public Works when cloudy or discolored water affects multiple faucets, continues after reasonable flushing, follows a reported main break or repair, or appears across neighboring properties. Provide the address, time of onset, color, odor, affected fixtures, and whether the water clears in a glass.

A licensed plumber may be appropriate when the issue is limited to one home or one fixture, particularly if the property has older plumbing, a water softener, a private service line, or a malfunctioning water heater. Keep samples only if officials or a qualified professional request them, since improper storage can affect testing results.

• Use cold water for drinking and cooking while you investigate.
• Check whether the water clears from the bottom upward in a glass.
• Compare several faucets and separate hot-water symptoms from cold-water symptoms.
• Rinse a removable aerator and inspect for particles without damaging the fixture.
• Report persistent discoloration, odors, or widespread changes to the appropriate utility contact.

Clear water that quickly loses its haze is often a temporary air-release issue. Persistent color, particles, odor, or changes across multiple properties should be documented and reported so the responsible utility or plumbing professional can identify the cause and protect water users.