Why gas leak awareness is critical
Natural gas leaks can lead to explosions, fires, carbon monoxide poisoning, and severe health symptoms. Because leaks often start small, recognizing the early warning signs is essential for keeping your home safe.
For foundational safety guidance, start with our Start Here guide and explore the Safety Symptoms Index for related hazard symptoms.
Common warning signs of a gas leak
1. Rotten egg or sulfur smell
Utility companies add a chemical called mercaptan to natural gas to create a strong sulfur-like odor. If you smell rotten eggs, treat it as an emergency.
2. Hissing or whistling sounds
A hissing noise near gas lines, appliances, or the meter often indicates a leak. Even a faint sound should be taken seriously.
3. Dead or discolored vegetation
Plants dying in a specific patch of your yard—especially near the gas line—can signal an underground leak.
4. Bubbles in standing water
If you see bubbling in puddles or wet soil above a gas line, escaping gas may be the cause.
5. Physical symptoms
Gas exposure can cause:
- Headaches
- Dizziness
- Nausea
- Fatigue or confusion
- Breathing difficulty
If symptoms improve when you go outside, a gas leak may be present.
What to do immediately if you suspect a gas leak
- Leave the home immediately—do not try to locate the leak.
- Avoid using light switches, electronics, or anything that could spark.
- Do not start your car if it’s in an attached garage.
- Call your gas company or emergency services from outside the home.
- Keep everyone away until professionals declare the home safe.
For more home safety fundamentals, explore our Home page and browse new additions on the Blog.
Trusted gas safety resources
For authoritative guidance on natural gas safety, visit the U.S. Consumer Product Safety Commission at CPSC.gov.