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Emissions requirements in California are regulated by CARB (California Air Resources Board). For many applications, CARB issues regulatory requirements separately from the EPA, although emissions standards might be aligned with the Federal ones. Updated heavy duty emissions standards apply from MY 2024. Electrification requirements for heavy duty vehicles are also in place, from model year 2024.
Content overview
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New emissions standards - from 2024
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Overview
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Proposed amendments
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Alignment to EPA provisions
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Unchanged CARB requirements
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New emissions standards - diesel engines
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Emissions limits
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Idling requirements
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Useful life values
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New emissions standards - Otto-cycle engines
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Emissions limits
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Useful life values
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Test Procedures
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Diesel engines
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Otto-cycle engines
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In-use testing programme
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Diesel engine vehicles
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Otto-cycle engine vehicles
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Advanced Clean Trucks Regulation
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Overview
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2024 amendments and proposed updates
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Deficits calculation
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Credits calculation
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Compliance with the regulation
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References
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