Code of Colorado Regulations · Regulation Number 31

Code of Colorado Regulations · Regulation Number 31

CONTROL OF METHANE EMISSIONS FROM MUNICIPAL SOLID WASTE LANDFILLS 5 CCR 1001-35

This regulation controls methane emissions from municipal solid waste landfills in Colorado. It covers applicability and definitions, waste-in-place reporting, gas collection and control system requirements, surface emissions monitoring, remote methane monitoring, cover requirements, alternative compliance options, recordkeeping and reporting, and test methods and procedures.

I.A.

This regulation sets methane emission reduction requirements for municipal solid waste landfills in Colorado to support the greenhouse gas emission reductions identified in Colorado Revised Statutes, §25-7-102(2)(g).

II.A.

This regulation applies to all municipal solid waste landfills that have received solid waste after November 8, 1987, except those on tribal lands that are not subject to regulation by the Commission.

II.B.

The owner or operator of a municipal solid waste landfill that closed before November 8, 1987 and has a gas collection and control system installed must comply only with the requirement to install and operate a biofilter (following Part C, Sections III.C.1. through III.C.4. and III.D) when the gas control device at the landfill is removed or permanently shut down.

II.C.

A municipal solid waste landfill owned by a municipal or county government that has less than 8 million short tons of waste-in-place as of December 31, 2025, gets three additional years to comply with any date-based requirements in this regulation. This extension applies to deadlines tied to specific dates or to the regulation's effective date.