The carbon monoxide (CO) concentrations encountered by pedestrians and workers in the streets of a large metropolis were monitored by a reliable and sensitive portable detector (the Ecolyzer). Up to 1,000 observations per day were collected for several months during the summer and fall of 1973. The CO levels ranged from 10 to 50 ppm (varying with wind speed and direction, atmospheric stability, traffic density, and the height of nearby buildings). Much higher average concentrations were found in such adverse sites as poorly ventilated underpasses and underground garages. Street closures for a pedestrian mall reduced levels on the mall to around the general urban background without large increases in readings on adjoining streets.

  • Corporate Authors:

    American Medical Association

    535 North Dearborn Street
    Chicago, IL  United States  60610
  • Authors:
    • Wright, G R
    • Shephard, R J
  • Publication Date: 1975-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00084324
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 1 1975 12:00AM