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Why Your Water Smells Weird—And What Your Plumbing Might Be Telling You

Image of Amanda Triolo - CEO of Grasshopper
Amanda August, CEO of Grasshopper Heating, Cooling & Plumbing
Published November 5, 2025
Why Your Water Smells Weird—And What Your Plumbing Might Be Telling You

Have you ever turned on the tap and noticed a funny smell in your water? Whether it’s a sulfur-like “rotten egg” scent, a metallic odor, or something just plain off, unusual water smells are more than just unpleasant—they can signal underlying issues with your plumbing or water supply.

At Grasshopper Heating, Cooling, Plumbing & Electrical, we often get calls from homeowners concerned about water odor. Understanding what different smells mean can help you take action before small problems turn into costly repairs.

1. Common Water Smells and What They Mean

Different odors often point to specific plumbing or water quality issues:

Sulfur or “Rotten Egg” Smell

  • Usually caused by hydrogen sulfide gas in your water heater or plumbing system.
  • Can result from bacterial growth in the water heater tank or natural minerals in well water.
  • While small amounts are typically harmless, persistent odors may indicate corrosion in the tank or bacterial contamination that requires professional attention.

Metallic or “Iron” Smell

  • Often a rusty or metallic scent in the water.
  • Usually comes from corroded pipes, especially in older homes with iron or galvanized plumbing.
  • High iron content in well water can also cause a metallic taste and reddish stains on sinks and laundry.

Chlorine or Bleach-Like Smell

  • Typically comes from municipal water treatment, where chlorine is added to kill bacteria.
  • A strong chlorine odor could indicate that water is sitting too long in the pipes or that your home needs a filter or aeration system to remove excess chlorine.

Musty or Earthy Smell

  • Often a sign of algae or bacterial growth in wells, storage tanks, or plumbing.
  • Can sometimes result from stagnant water in pipes that aren’t used frequently.

2. What Your Plumbing Might Be Telling You

Water odors don’t appear out of nowhere—they usually signal a plumbing system issue. Common causes include:

  • Old or corroded pipes: Metallic smells or rust-colored water can indicate aging plumbing that may need inspection or replacement.
  • Water heater problems: A sulfur-like smell often comes from the water heater anode rod reacting with bacteria or minerals in the tank.
  • Well water contamination: If you rely on a private well, certain smells may indicate natural mineral content or bacterial growth. Testing and treatment may be required.
  • Stagnant water: Pipes that aren’t used regularly can develop odors and taste issues over time.

Ignoring these signs can lead to bigger problems, such as pipe damage, plumbing leaks, or even health risks if bacteria are present.

3. Steps You Can Take at Home

While some water smells require professional attention, there are steps you can take to minimize odor:

  • Flush the system: Run taps for several minutes to clear out stagnant water.
  • Clean your aerators: Remove and clean faucet screens where bacteria or sediment can accumulate.
  • Check your water heater: If it’s old or producing a sulfur smell, consider flushing the tank or replacing the anode rod.
  • Install a filtration system: Activated carbon filters can reduce chlorine, metallic, or musty odors.

These measures can improve taste and smell temporarily, but if the odor persists, it’s time to call a professional.

4. When to Call a Plumbing Professional

Persistent or strong odors should never be ignored. Call Grasshopper Heating, Cooling, Plumbing & Electrical if you notice:

  • Sulfur or rotten egg smells coming from multiple faucets
  • Rust-colored or metallic water
  • Musty or earthy odors in your well water
  • Sudden changes in water smell or taste

Our licensed technicians can test your water, inspect your plumbing system, and recommend the right solutions, whether it’s water treatment, pipe replacement, or water heater maintenance.

5. Final Word: Don’t Ignore Unusual Water Smells

Water is essential for daily life, and unusual odors are a warning sign that something might be wrong with your plumbing system. Early action can prevent bigger problems, protect your health, and save you money on costly repairs.

At Grasshopper Heating, Cooling, Plumbing & Electrical, we provide expert plumbing inspections, water testing, and maintenance solutions to keep your home’s water clean, safe, and odor-free.

Contact us today at gograsshopper.com to schedule a professional inspection and ensure your water is healthy and safe.


Image of Amanda Triolo - CEO of Grasshopper
Amanda August

Amanda August is the CEO of Grasshopper Heating, Cooling, Plumbing & Electrical, a rapidly growing HVAC company based in Albany, New York. She leads by focusing on creating opportunities that positively impact both employees and customers.


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