This flyer explains why mercaptan is added to natural gas, how it helps detect leaks, and why odorization is required for safety. It educates customers about odor fade, outlines additional signs of a gas leak beyond smell, and provides clear step-by-step instructions on what to do if a leak is suspected, including calling 911 and National Grid immediately.
Audience: Affected public
Region(s): All
Date published: February 2026
Project: 18474 Product: N/A
