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Natural Gas Facts

Natural gas is composed primarily of methane. It is a naturally occurring form of energy.

Natural gas is environmentally benign and is transported primarily through a vast network of underground pipelines.

Natural gas in non-toxic.

Natural gas is colorless.

Natural gas is lighter than air, approximately 1/2 the weight, and will dissipate if allowed to reach the outside atmosphere.

Natural gas has a high ignition temperature, approximately 1163 degrees Fahrenheit.

Natural gas flammability range is approximately 5 - 15% gas in air.

An odorant is added to the natural gas so that it can be readily detected if it leaks from its container.

Propane Gas Facts

Propane gas is a manufactured gas and is stored in tanks in a liquid form.

Propane gas is non-toxic.

Propane gas is colorless.

Propane gas is heavier than air, approximately 1.5 the weight, and will not readily dissipate up into the atmosphere.

Propane gas has an ignition temperature of approximately 940 degrees Fahrenheit.

Propane gas flammability range is approximately 2.2 - 9.6 % gas in air.

An odorant is added to the propane gas so that it can be readily detected if it leaks from its container.

Carbon Monoxide

Carbon monoxide (CO) is a colorless, odorless, tasteless gas that is very toxic. It combines with the body's blood and prevents it from absorbing oxygen. If inhaled for prolonged periods, carbon monoxide can cause serious illness or even death.

It can be produced when combustion of any fuel (heating oil, gasoline, diesel fuel, propane, kerosene, natural gas, coal or wood) takes place without sufficient oxygen.

Exposure to carbon monoxide causes symptoms that are sometimes mistaken for those of a cold or flu -- headaches, dizziness, fatigue and nausea.

Always operate all appliances as intended according to the manufacturers instructions.

Possible sources of carbon monoxide:

  1. A vehicle or gasoline engine running in an enclosed garage.
  2. Using charcoal or grilling in a confined space.
  3. Fuel burning appliances that are not operating properly.
  4. Fuel burning appliances that are not venting properly.
If you suspect you have a problem with carbon monoxide in your home:

  1. Get your family outside.
  2. Call your fuel supplier or qualified service technician to an emergency inspection.
  3. Do not return home until the source of the CO has been discovered and the problem has been corrected.

Natural Gas Leaks

We offer 24-Hour Emergency Response!

Marion Gas Systems has trained service technicians available to assist customers with gas leaks, disturbed or broken gas lines, carbon monoxide calls, and other gas emergencies that may occur.

Exp                DANGER!               

What to do if you smell gas:

INVESTIGATE - Follow your nose, try to locate the source of the odor. It may be something that is easily correctly, such as a pilot light that is out.

If you can't find the source or if the odor persists:

CALL - Marion Gas Systems has an emergency dispatch service available 24 hours.

If the odor is strong or you hear a hissing sound:

Do not operate electrical switches - this includes your telephone.
Extinguish any open flame.
Evacuate the building - leave doors open and

CALL 423-837-7164 OR 423-837-6115 OR 911

A qualified technician or service crew will be dispatched immediately.


If it smells like rotten eggs, it may be the scent of safety.

Natural gas in its original state is odorless and colorless, so Marion Gas Systems has added a distinctive chemical odorant to help you recognize it.

We constantly monitor odorant injection levels into our distribution system to insure the highest possible safety standards for our customers.

The odor smells bad on purpose so you can identify natural gas even in small amounts.

If you are not familiar with the odorant in natural gas, please drop by any of our conveniently located offices and we will be happy to give you a "scratch and sniff" sample of the odorant.

If you ever think you smell natural gas, please give us a call and we will be glad to dispatch our trained technicians to investigate the situation immediately.

Our emergency dispatchers are available 24 hours a day, 7 days a week to assist you in any natural gas emergency.

911 in Marion County

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