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FEDERALhearing transcript
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1965 Senate Hearings on Vehicle Emission Standards (S. 306)

Original title: Air pollution control: hearings before a Special Subcommittee on Air and Water Pollution of the Committee on Public Works, United States Senate, Eighty-ninth Congress, first session, on S. 306, a bill to amend the Clean air act to require standards for controlling the emission of pollutants from gasoline-powered or diesel-powered vehicles, to establish a federal air pollution control laboratory, and for other purposes, April 7, 1965.

July 20, 2026

air pollutionenvironmental regulationautomotive standardspublic healthfederal research

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The Frame

What this does

The hearing represents a foundational step in the creation of federal automotive emission standards, which eventually mandated the technology used in all modern vehicles to reduce tailpipe pollution.

Who is mentioned in the record

Potentially affected actors named in the source documents. Mention is not a position.

Automobile manufacturers

The bill proposes new federal standards for vehicle emissions that would require changes to engine and exhaust manufacturing.

General public

The legislation aims to regulate air quality, which impacts public health and the types of vehicles available for purchase.

What changed

Last recorded activity July 20, 2026.

What's next

Next step not available in the current record.

Summary

This document records the April 7, 1965, Senate subcommittee hearings regarding S. 306, a proposed amendment to the . The bill aimed to establish federal emission standards for gasoline and diesel vehicles and create a national air pollution control laboratory.

Key Facts

  • S. 306 proposes amending the Clean Air Act to mandate federal emission standards for gasoline-powered vehicles.
  • S. 306 proposes amending the Clean Air Act to mandate federal emission standards for diesel-powered vehicles.
  • The bill includes a provision to establish a federal air pollution control laboratory.
  • The hearing was held by the Special Subcommittee on Air and Water Pollution during the 89th Congress, first session.
  • The primary focus of the legislation is the regulation of pollutants emitted from motor vehicles.

Why It Matters

The hearing represents a foundational step in the creation of federal automotive emission standards, which eventually mandated the technology used in all modern vehicles to reduce tailpipe pollution.

Frequently Asked Questions

What was the purpose of S. 306?
S. 306 was intended to amend the to set federal standards for vehicle emissions and create a dedicated federal laboratory for air pollution research.
When did these hearings take place?
The hearings were held on April 7, 1965.

News Coverage

No news coverage found yet. Articles are indexed twice daily.

Discoveries

Patterns POLISCOPE noticed across the record. These are observations to investigate, not conclusions.

policy shift90% confidence

Federalization of Emission Standards

The hearing documents the transition from state-level or non-existent emission standards to a centralized federal regulatory framework.

Clean Air ActS. 306

Connected Entities

organizationCommittee on Public Works“The parent committee of the subcommittee.”Map →
organizationSpecial Subcommittee on Air and Water Pollution“The Senate subcommittee conducting the hearings.”Map →

Sources

Open source document

www.govinfo.gov

Analysis Score

0–100
  • Significance85
    How much this matters to a regular citizen
  • Controversy40
    Intensity of disagreement among stakeholders
  • Entertainment10
    Compellingness for a non-policy-wonk reader
  • Buzz5
    Current news / social attention level

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