How to Tell If You Have a Gas Leak (And What to Do About It)
July 21, 2026
Gas line issues aren't like a slow drip under the sink — they can turn dangerous fast, so it's worth knowing the warning signs before you ever need them.
Signs of a possible gas leak
- A rotten egg or sulfur smell near an appliance, meter, or gas line
- A hissing or whistling sound near a gas line or appliance
- Dead or discolored vegetation in a patch near an underground line
- Unexplained higher gas bills with no change in usage
- Physical symptoms like headache, dizziness, or nausea that improve when you leave the house
What to do if you suspect a gas leak
- Leave the house immediately — don't stop to open windows or search for the source
- Don't flip light switches, use your phone, or do anything that could create a spark
- Once outside and at a safe distance, call your gas utility's emergency line and 911
- Don't go back inside until it's been declared safe
Where gas line problems typically come from
Aging or corroded lines, a poorly connected appliance hookup, and physical damage from digging or settling are the most common causes. New appliance installations — a range, dryer, or gas water heater — are also a common point of failure if the connection isn't done correctly.
We handle gas line repair and installation, including pressure testing, for water heaters, ranges, dryers, and outdoor fixtures.
Need a gas line installed or inspected the right way? Contact us — safe, code-compliant work, every time.
Carolinas A1 Plumbing Service serves homeowners and businesses throughout Greer, Greenville, Spartanburg, Simpsonville, Taylors, Duncan, Lyman, Easley, Travelers Rest, Mauldin, Fountain Inn, Pickens, and Anderson. See all the areas we cover.
Frequently Asked Questions
- What does a gas leak smell like?
- Natural gas is odorless on its own, so utilities add a chemical (mercaptan) that smells like rotten eggs or sulfur specifically so leaks are noticeable.
- What should I do if I smell gas?
- Leave the house immediately, don't flip any light switches or use anything that could spark, and call your gas utility or 911 from outside. Then reach out to a plumber to find and fix the source.
- What are other signs of a gas leak besides smell?
- A hissing sound near a gas line or appliance, dead patches of vegetation near an underground line, or unexplained nausea/dizziness that improves when you leave the house can all indicate a leak.
Need help with gas line repair & installation? We serve Greer and the Upstate, 24/7.
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