The Effectiveness and Cost of Retrofit For Reducing Automobile Emissions

Joel Horowitz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


EPA has recently evaluated several automobile retrofit devices that are potentially applicable to pre-1975 vehicles. The results of this evaluation are described and used to estimate the effectiveness and cost of retrofit for reducing total automobile emissions in the period 1975-1985. It is estimated that retrofit combined with inspection/maintenance can potentially achieve reductions in automobile emissions of 33% to 60% in 1975, depending on pollutant, and 10% to 20% in 1985. The estimated present value discounted to 1972 of the average cost per retrofit vehicle is $30 to $152 over the period 1975-1985 depending on the retrofit system used. The corresponding annualized cost is $6 to $28 per vehicle.

Original languageEnglish (US)
Pages (from-to)395-418
Number of pages24
JournalJournal of the Air Pollution Control Association
Issue number5
StatePublished - May 1 1973

ASJC Scopus subject areas

  • Pollution
  • General Environmental Science
  • Environmental Engineering
  • General Earth and Planetary Sciences


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