Is a Gas Leak Dangerous? What Tampa Homeowners Must Know

How Dangerous Is a Gas Leak?

Natural gas is highly flammable. A concentration of just 5–15% in air creates an explosive mixture that can be ignited by a spark, flame, or even a static discharge. The rotten egg odor you smell is mercaptan, an additive that gas utilities (including Tampa's TECO Energy) inject to make otherwise odorless natural gas detectable.

Beyond explosion risk, natural gas displaces oxygen in enclosed spaces. In a confined area with a significant leak, the reduced oxygen concentration can cause dizziness, unconsciousness, and death. Carbon monoxide — produced when gas appliances burn improperly — is an additional silent hazard that kills hundreds of Americans annually.

What to Do Immediately If You Smell Gas

Do NOT turn any light switches on or off. Electrical switches can create sparks. Do NOT use your cell phone inside the house. Do NOT light matches, candles, or cigarettes. Do NOT start your car if it's in an attached garage. Do NOT operate any appliance with a motor, including fans, vacuums, or garage door openers.

Leave the house immediately. Get everyone out — people and pets. If you can easily reach the front door or a window, open it on your way out to help ventilate, but don't delay your exit to open multiple windows.

Once you're safely outside and at least 100 feet from the house, call 911 and TECO Energy's gas emergency line at (813) 223-0800. Then call us at (813) 219-8764 for emergency gas line repair.

Do not re-enter the house until TECO or a licensed gas plumber has located and repaired the leak and confirmed the home is safe to occupy.

Common Sources of Gas Leaks in Tampa Homes

Gas leaks in Tampa homes most commonly occur at connection points: where gas lines connect to appliances (water heaters, stoves, dryers, furnaces), at the gas meter and regulator assembly, and at joints in older black iron gas piping. Flexible gas connectors (the corrugated stainless steel lines connecting appliances to the gas supply) can be damaged by shifting, vibration, or corrosion over time.

Gas lines running through walls, under floors, or underground can develop leaks from corrosion, soil movement, or damage from other work (renovation, landscaping, pest control). These leaks may be small enough that you only notice the smell intermittently, often when the HVAC system is running (it circulates air past the leak source).

How Gas Leaks Are Detected and Repaired

Professional gas leak detection uses electronic combustible gas detectors that can identify leaks too small to smell. We systematically check every gas connection in the home, from the meter to each appliance. For underground or in-wall leaks, we use pressure testing and tracer gas methods to pinpoint the location without unnecessary excavation.

Repair methods depend on the leak source. A loose fitting may just need tightening with proper thread sealant. A corroded section of pipe needs replacement. A failed flexible connector needs a new connector. All gas repairs are tested with a pressure test after completion to verify the system is leak-free, and we can provide documentation for your records.

Preventing Gas Leaks in Your Tampa Home

Have gas connections inspected annually, especially on older appliances. Replace flexible gas connectors that show signs of corrosion, kinking, or damage. Install carbon monoxide detectors on every level of your home and near sleeping areas — Florida building code requires them in new construction, but many older Tampa homes don't have them. Never use gas-powered equipment (generators, grills, heaters) indoors or in enclosed spaces.