Why Does My Water Taste, Smell, or Look Strange?

Water that suddenly tastes metallic, smells like chlorine or rotten eggs, or looks cloudy/brown can be unsettling—especially when it comes out of the kitchen tap. In many cases, the cause is temporary (like routine utility work), but sometimes it’s a warning sign of sediment, corrosion, plumbing issues, or even backflow/cross-connection risk.

In this guide, Atlas Backflow Services explains the most common reasons your water may taste, smell, or look strange—and what our Backflow Repair experts in Los Angeles recommend you do next.

Quick Answer: Most Common Causes

Here are the top culprits behind unusual tap water changes, and what our Backflow Repair experts in Los Angeles recommend checking first:

• Disinfectants (chlorine/chloramine): medicinal taste or pool-like smell

• Sediment or utility flushing: cloudy, brown, or gritty water

• Corroded pipes or water heater issues: metallic taste, rust tint, flakes

• Hydrogen sulfide: “rotten egg” smell (often hot water lines or heaters)

• Backflow or cross-connection events: odd odor/taste after pressure changes

• Algae/organic material (rare in treated systems but possible): earthy/musty notes

If Your Water Smells Like Chlorine (or a “Pool”)

A chlorine smell is often normal in a city-supplied water system. Municipalities maintain disinfectant levels to keep water safe as it travels through miles of pipes.

Why it happens:

• Seasonal or weather-related adjustments in disinfectant levels

• Utility maintenance or post-repair disinfection

• Longer water “age” in the distribution system during low-demand periods

What our Backflow Repair experts in Los Angeles recommend:

• Run cold water for 2–3 minutes and re-test the smell.

• Fill a pitcher and let it sit uncovered in the fridge (chlorine can dissipate).

• If the odor is suddenly strong, persists for more than 24–48 hours, or is paired with discoloration, investigate further.

If Your Water Smells Like Rotten Eggs

A sulfur/rotten-egg odor typically points to hydrogen sulfide or related reactions. In many homes, it’s more noticeable in hot water.

Common causes

• Water heater reaction (anode rod interacting with minerals)

• Bacteria in drain lines (sometimes mistaken for water odor)

• Localized plumbing issues

What our Backflow Repair experts in Los Angeles recommend

• Determine whether the smell is only from the hot tap (heater-related) or both hot and cold (broader issue).

• If it’s hot-only, consider a water heater inspection and flushing.

• If it affects multiple fixtures or appears after nearby line work, rule out pressure/backflow-related disturbances.

If Your Water Tastes Metallic, Bitter, or Like Pennies

A metallic taste can come from pipe corrosion, aging fixtures, or changes in water chemistry that loosen deposits inside plumbing.

Potential sources

• Old galvanized pipes shedding rust and scale

• Corroded copper plumbing or brass fittings

• Sediment stirred up during water main repairs

What our Backflow Repair experts in Los Angeles recommend

• Test whether the taste is stronger after water sits overnight. If yes, run the tap 30–60 seconds and re-check.

• Use cold water for cooking and drinking (hot water dissolves metals more readily).

• If taste persists, consider a plumber’s inspection—and if there’s any chance of cross-connection or pressure issues, schedule a backflow evaluation with Atlas Backflow Services.

If Your Water Looks Cloudy (Milky or White)

Cloudy water is often caused by tiny air bubbles, especially after changes in pressure (like hydrant use or line repairs).

How to tell if it’s air

• Fill a clear glass and watch: if it clears from bottom to top within a minute or two, it’s usually air.

What our Backflow Repair experts in Los Angeles recommend

• Run cold water briefly and check multiple faucets.

• If cloudiness persists, feels gritty, or comes with odor/taste changes, treat it as a possible sediment event and investigate further.

If Your Water Is Brown, Yellow, or Has Sediment

Brown or yellow water often signals rust, disturbed sediment, or aging pipe scale. In Los Angeles, it can happen after nearby work on water mains, hydrant flushing, or sudden demand shifts.

What to do right away

• Avoid running hot water (it can pull sediment into the water heater).

• Run cold water from the lowest faucet (often a bathtub spout) for a few minutes and check if it clears.

What our Backflow Repair experts in Los Angeles recommend

• If discoloration lasts more than a few hours, appears across the neighborhood, or returns repeatedly, contact your water provider and document times/locations.

• If discoloration occurs after a pressure drop or plumbing changes, schedule a professional review—backflow conditions can be more likely during unusual pressure events.

When Backflow Might Be the Hidden Cause

Backflow occurs when water flows in the reverse direction, potentially pulling contaminants into clean lines. This is usually prevented by a properly installed and maintained backflow prevention device.

Situations that can increase risk

• Water main breaks, hydrant use, or sudden pressure drops

• Irrigation systems, pools/spas, or commercial equipment with cross-connections

• Faulty, aging, or untested backflow preventers

Signs that warrant a closer look

• Strange taste/odor that starts right after utility work or a major pressure change

• Multiple fixtures affected at once

• Recurring issues that “come and go” without a clear pattern

What our Backflow Repair experts in Los Angeles recommend

• Don’t guess—confirm protection. If your property has a backflow preventer (common in many LA-area homes and most commercial sites), keep it tested on schedule and repaired promptly when it fails. Atlas Backflow Services can help determine whether your symptoms align with backflow risk and whether your device is functioning as intended.

DIY Checks Before You Call (Safe, Simple Steps)

To narrow down the cause quickly, our Backflow Repair experts in Los Angeles recommend these homeowner-friendly checks:

1. Compare hot vs. cold (heater-related issues usually show up in hot water).

2. Check multiple faucets (isolates fixture issues vs. whole-home problems).

3. Look for neighborhood patterns (ask a neighbor; check local notices).

4. Inspect aerators (sediment often collects in faucet screens).

5. Note timing (after irrigation cycles, after repairs, after a pressure drop).

If you suspect contamination (chemical smell, fuel-like odor, sudden severe change), stop drinking the water and contact your water provider and a qualified professional immediately.

Why Los Angeles Properties Should Take This Seriously

LA’s mix of older neighborhoods, evolving infrastructure, hillside pressure zones, and widespread irrigation systems makes it especially important to maintain plumbing and cross-connection safeguards. Even when the water entering the area is treated and safe, conditions inside distribution lines and on private property can affect what comes out of your tap.

That’s why our Backflow Repair experts in Los Angeles recommend treating recurring taste/smell/appearance changes as a diagnostic signal, not just an inconvenience.

How Atlas Backflow Services Can Help

If your water changes don’t resolve quickly—or you suspect a cross-connection or backflow prevention issue—Atlas Backflow Services can help with:

• Backflow preventer diagnostics and repair

• Guidance on testing schedules and compliance (common for many properties)

• Identifying conditions that may contribute to reverse-flow risk

When water is acting “off,” it’s often a combination of factors. The goal is to rule out safety risks first, then address plumbing or treatment preferences.

FAQ: Strange Tap Water in Los Angeles

Is chlorine smell in tap water dangerous?

Usually no at typical municipal levels, but if it’s unusually strong or sudden, follow up. Our Backflow Repair experts in Los Angeles recommend monitoring duration and checking for accompanying discoloration.

Why is only my hot water smelly?

Often the water heater (sediment, anode rod reactions). If it’s both hot and cold, broaden the investigation.

Could backflow make water taste or smell odd?

Yes—especially after pressure changes. Our Backflow Repair experts in Los Angeles recommend ensuring your backflow prevention device is functioning and tested as required.

Closing: Get Clear Answers (and Clear Water)

If your tap water tastes, smells, or looks strange, it may be harmless and temporary—or it may point to a condition that needs professional attention. Atlas Backflow Services is here to help you identify whether backflow protection is part of the solution and to restore confidence in your water.