Smell for a rotten egg or sulfur odor
Listen for hissing near gas lines, appliances, or meters
Check for dead or dying vegetation near buried gas lines
Look for dust, dirt, or bubbles being blown from the ground
Use a gas leak detector or combustible gas detector
Apply soapy water to suspected fittings and look for bubbles
Turn off all flames, sparks, and electrical devices if a leak is suspected
Evacuate the area immediately if you suspect a significant leak
Call your gas utility or emergency services from a safe location
Do not use matches, lighters, switches, or phones near the suspected leak