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Report - California Air Resources Board - arb ca

Report - California Air Resources Board - arb ca 2025

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The document is a final report on the on-road measurement of emissions from light-duty gasoline and heavy-duty diesel vehicles, prepared for the California Air Resources Board. It details a study conducted in the Caldecott tunnel in 2006, comparing emissions trends over time. Key findings include significant reductions in nitrogen oxides (NOx), particulate matter (PM), and carbonyl emissions from light-duty vehicles due to improved emission control technologies and fuel reformulation. The report also highlights the increasing importance of diesel engines as sources of NOx and carbonyl emissions, while ammonia emissions from light-duty vehicles have decreased since 1999. The study emphasizes the need for ongoing monitoring of vehicle emissions to inform air quality management strategies.

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Click ‘Get Form’ to open the Report - California Air Resources Board in the editor.
Begin by reviewing the 'Introduction' section, which provides context for the report. Familiarize yourself with the purpose and objectives outlined.
Move to the 'Table of Contents' to navigate through various sections such as 'Emission Trends', 'Carbonyl Emissions', and 'Ammonia Emissions'.
Fill out any required fields in the form, ensuring you provide accurate data as specified in each section. Pay special attention to emission factors and trends discussed.
Utilize our platform's features to highlight or annotate important findings, especially in sections discussing emission reductions and regulatory impacts.
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Which city in California has the worst air pollution?

Real-time California most polluted city ranking #CitiesAQI⁺ US 1 Dinkey Creek 103 2 Richgrove 87 3 Terra Bella 83 4 Lemon Cove 816 more rows

How do I complain about the California air Resource Board?

If you would like to contact the California Air Resources Board about a complaint, please call (800) 952-5588 or go to for more information.

What does the California air Resource Board do?

The California Air Resources Board focuses on Californias unique air quality challenges by setting the states own stricter emissions standards for a range of statewide pollution sources including vehicles, fuels and consumer products.

Who does the California Air Resources Board report to?

CARB is a part of the California Environmental Protection Agency, an organization which reports directly to the Governors Office in the Executive Branch of California State Government.