How to Spot a Gas Leak and What to Do Next

July 16, 2025

A gas leak is a serious safety hazard that requires immediate attention. Natural gas is odorless by nature, but suppliers add a chemical called mercaptan to give it a distinct rotten egg smell. Knowing the warning signs and how to react can help you protect your home, family, and neighbors from potential danger. Here's a helpful guide on how to spot a gas leak and the proper steps to take if you suspect one.

Common Signs of a Gas Leak

1. Unusual Smell:

The most noticeable indicator of a gas leak is the strong smell of rotten eggs or sulfur. Even a faint scent should never be ignored. If you detect this odor in or around your home, it’s time to take action.

2. Hissing or Whistling Sounds:

Gas escaping from a pipe or appliance can produce a hissing noise. If you hear this sound near a gas line or appliance, it could indicate a leak and should be addressed right away.

3. Physical Symptoms:

Exposure to gas can cause dizziness, nausea, headaches, fatigue, or difficulty breathing. If you or others in your household start to feel sick for no apparent reason, and symptoms improve when you leave the house, a gas leak might be the cause.

4. Dead or Discolored Vegetation:

If you notice dead plants, grass, or shrubs in an otherwise healthy area of your yard, especially near the gas line, it could be due to a leak underground that’s depriving roots of oxygen.

5. Bubbles in Water or Dust Blowing from the Ground:

Gas escaping from underground can create bubbles in standing water or cause dust and dirt to blow up from the ground unexpectedly. These are serious warning signs of a leak beneath the surface.

What to Do If You Suspect a Gas Leak

Leave the Area Immediately:

If you suspect a gas leak, leave the building or area right away. Don’t turn on lights, ignite flames, or use any electrical devices, including phones, inside the house.

Avoid Creating Sparks:

Even the smallest spark can cause an explosion in the presence of gas. Avoid flipping switches, lighting matches, or using lighters. If your car is nearby, don’t start it.

Call Emergency Services and Your Gas Provider:

Once you’re a safe distance away, call 911 and then your utility company’s emergency gas line to report the leak. They can shut off the gas and investigate the source of the problem.

Do Not Attempt Repairs Yourself:

Leave any repairs or diagnostics to licensed professionals. Gas line work is dangerous and should only be handled by experienced technicians.

Ventilate the Area—If It’s Safe:

When it comes to detecting and repairing gas leaks, don’t take chances—trust a licensed, experienced team. Farfaras and Son Plumbing and Heating CO INC has proudly served Billerica, Massachusetts, for 65 years, delivering safe, reliable plumbing and heating solutions. If you suspect a gas leak or need your system checked, contact us today for professional gas piping services you can count on.

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