Smell a strong sulfur or rotten egg odor
Hear a hissing or whistling sound near gas lines or appliances
See a white cloud, dust, or bubbles in standing water near a gas line
Notice dead or dying vegetation over or near buried gas lines
Feel dizziness, nausea, headache, or fatigue indoors
Notice unusual breathing difficulty or eye, nose, or throat irritation
See pilot lights going out unexpectedly
Notice gas appliances not working properly
Check for an unusually high gas bill without increased use
Use a gas detector or methane alarm if available
Evacuate immediately if you suspect a leak
Avoid using switches, phones, flames, or anything that could spark
Call emergency services or the gas utility from a safe location