The purpose of Rule R307-230 is to reduce emissions of nitrogen oxides (NOx) from natural gas-fired water heaters.

KEY: water heaters, natural gas, NOx, air quality

Date of Last Change: August 6, 2025

Notice of Continuation: July 12, 2022

Authorizing, and Implemented or Interpreted Law: 19-2-101; 19-2-104; 19-2-107.7