For natural gas suppliers, mercaptan serves a valuable public safety purpose without causing negative effects on its own. Happily, an extraordinarily foul-smelling chemical called thioacetone was never considered an option. In a famous 1889 incident in Freiburg, Germany, a tiny laboratory release of thioacetone – literally a few drops – spread a repulsive stench that forced an entire city of nauseous citizens to evacuate. It’s so potent that revolted humans can detect its presence at a vanishingly small .02 parts per billion.
“Natural gas is originally odor-free, but suppliers add a sulfur-containing chemical called mercaptan for safety, so people can tell if a leak occurs,” says Jennifer Simms, Owner, Paul Davis Restoration of Bowling Green, Kentucky. “It may smell like something else: sewer gas, dead rodents, skunks, or even well water or new drywall. But take immediate action to get help if there is even a small chance that the source is a gas leak from a pipe, connection or appliance.”

Gas leaks of any size are emergencies even if the smell is very faint. Escaping gas can cause fires, explosions, or asphyxiation. Here’s what to do and not do immediately if you suspect a gas leak, with added tips for boosting natural gas safety at your property after the crisis passes.
DO THIS:
- Leave the building immediately. Don’t pause to do anything as you exit, including turning off lights or opening windows.
- Call for help by dialing your gas supplier and/or 911.
- Rely on gas professionals to trace and address the leak.
- Return to the structure only when professionals indicate the premises are safe.
BUT DON’T:
- Attempt to locate or fix the leak yourself.
- Use light switches, lighters, matches, phones or anything that may create a spark which triggers fires or explosions.
- Start a car, activate a garage door opener or start a lawnmower near the suspected leak.
- Plug or unplug appliances.
DO AFTER professionals assess and resolve gas leak threats:
- Install a natural gas leak detector. Affordable models are available on-line and at big box stores.
- Regularly inspect and maintain all appliances that use gas such as furnaces, fireplaces, ranges and dryers.
- Ensure that exhaust vents for gas-powered items are clear of debris and blockages.
- Keep areas around gas appliances free of debris and flammable items.
Do you need help with property problems? Contact Paul Davis Restoration for prompt assistance at any hour, every day of the year.