Log in | Subscribe

Emission Standards

Canada: Stationary Compression-Ignition Engines

Regulatory Background

The first Canadian federal emission standards for stationary compression-ignition (SCI) engines were adopted in December 2020, as part of the Off-road Compression-Ignition (Mobile and Stationary) and Large Spark-Ignition Engine Emission Regulation [5161].

The SCI emission requirements are applicable to engines that have a displacement of less than 30 L per cylinder and are used to provide primary sources of electricity or power machines such as fire pumps and emergency backup generators.

The emission standards incorporate by reference emission regulations by the US EPA and the US EPA is recognized as a certifying agency. The engines must be offered for sale concurrently in the USA and Canada.

Emission Standards

The SCI emission standards became effective on June 4, 2021, based on the date of manufacture (engines manufactured before June 4, 2021 are not subject to any federal emission regulations, regardless of their importation date into Canada).

SCI engines must meet US EPA Tier 4 nonroad engine standards, with the exception of backup/emergency engines and engines used in remote locations, Table 1. A remote location is defined as a geographic area that is not serviced by an electrical or natural gas distribution network.

Table 1
Applicable US EPA tiers for Canadian SCI engines
Power range Non-backup and non-remote Backup/emergency or remote
≤37 kWTier 4Tier 2
>37 kW to ≤560 kWTier 4Tier 3
>560 kWTier 4Tier 2
Note: Fire pumps have separate, less stringent standards.

The regulations include provisions to allow the use of alternative test procedures (ATP) to the US EPA test procedures set out in CFR part 60.