Odor is one warning sign, but SoCalGas cautions that odor can be masked or fade; sound and visible damage also matter.
Do not use a phone inside, operate lights or appliances, start a vehicle, create a flame, or attempt to control the leak. The site's plumbing call button is intentionally secondary on this page because a routed provider is not the gas utility.
Keep this boundary: Never use this site's plumbing referral line as a substitute for SoCalGas or emergency services in a suspected gas-leak emergency.