Utah Administrative Code

The Utah Administrative Code is the body of all effective administrative rules as compiled and organized by the Division of Administrative Rules (see Subsection 63G-3-102(5); see also Sections 63G-3-701 and 702).

NOTE: For a list of rules that have been made effective since October 1, 2019, please see the codification segue page.

NOTE TO RULEFILING AGENCIES: Use the RTF version for submitting rule changes.

R307. Environmental Quality, Air Quality.

Rule R307-230. NOx Emission Limits for Natural Gas-Fired Water Heaters.

As in effect on October 1, 2019

Table of Contents

R307-230-1. Purpose.

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

R307-230-2. Applicability.

R307-230 applies to the sale or installation of natural gas-fired water heaters on or after July 1, 2018.

R307-230-3. Emission Limits and Requirements.

(1) The State Construction and Fire Codes Act, Subsection 15A-6-102, Enacted by Chapter 236, 2017 General Session, is hereby incorporated by reference.

(2) Manufacturers shall use South Coast Air Quality Management District Method 100.1 to comply with the NOx emission limits.


water heaters, natural gas, NOx, air quality

Date of Enactment or Last Substantive Amendment

August 3, 2017

Authorizing, Implemented, or Interpreted Law

19-2-101; 19-2-104; 19-2-107.7

Additional Information


For questions regarding the content or application of rules under Title R307, please contact the promulgating agency (Environmental Quality, Air Quality). A list of agencies with links to their homepages is available at http://www.utah.gov/government/agencylist.html or from http://www.rules.utah.gov/contact/agencycontacts.htm.