Natural Gas and Carbon Monoxide

Natural gas is a safe and efficient energy source used in many homes and businesses, but because it's colorless and odorless in its natural state, detecting a leak can be challenging. That’s why safety measures – like adding a distinctive odor – are in place to help you recognize a problem before it becomes dangerous. To help detect leaks, Avista adds Mercaptan, a sulfur-like rotten egg smell, to our natural gas. But smell isn’t the only clue.

A natural gas detector adds an extra layer of safety. These devices monitor gas levels and alert you if they become unsafe, but your senses are your first line of defense. It’s important to know the signs.

Signs of a Natural Gas Leak:

• Smell: A strong odor like rotten eggs.
• Hear: Hissing or roaring sounds near a gas line or appliance.
• See:
  • Dust blowing from a hole in the ground.
  • Continuous bubbling in wet or flooded areas.
  • Dead or discolored vegetation in an otherwise green area.
  • Pilot lights that won’t stay lit but still emit gas.

Carbon Monoxide (CO): A Silent Threat

Carbon monoxide is another invisible danger. It’s a colorless, odorless, and toxic gas produced when fuel burns without enough oxygen – often due to blocked vents or malfunctioning appliances.

Unlike natural gas, CO has no added odor, making it even harder to detect without a dedicated CO detector.

Keep an eye out for symptoms of CO Poisoning including headache, dizziness, fatigue, nausea, confusion, blurry vision, chest pain, shortness of breath, and flushed or red skin.

If you or someone else experiences these symptoms and you suspect CO exposure, act fast:

1. Evacuate: Get everyone to fresh air immediately.
2. Call 911, then Avista at (800) 227-9187.
3. Seek medical attention and inform staff about suspected CO poisoning.

Preventive Steps You Can Take:

• Schedule annual maintenance for fuel-burning appliances.
• Ensure proper ventilation for all appliances.
• Never use outdoor equipment indoors, including grills and generators.
• Install a CO detector to monitor the air and alert you to danger.

Reminder: CO detectors are not a substitute for emergency action. If you ever suspect a CO or gas leak, evacuate immediately, then call 911 and Avista at (800) 227-9187.

Why Knowing the Difference Matters

While both natural gas and CO leaks pose serious risks, they behave differently and require different detection methods. Natural gas leaks are typically easier to identify due to the added odor, while CO leaks are silent and symptom based. Confusing one for the other – or missing the signs entirely – can delay critical action.

Understanding the difference helps you respond appropriately:

• Natural gas leaks may lead to fire or explosion risks.
• CO leaks can cause poisoning and death without warning.

Being aware of both dangers – and how to detect them – empowers you to protect your home, your family, and your community.

Safety is always a priority. Stay alert, install detectors, and know the signs.