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Carbon monoxide in school buses.

C J Johnson, J Moran, R Pekich

    American Journal of Public Health
    |December 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Carbon monoxide (CO) levels in Seattle school buses were investigated after children fell ill. Many buses exceeded EPA standards, posing a significant health risk to students.

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    Area of Science:

    • Environmental Health
    • Occupational Safety
    • Pediatric Health

    Background:

    • An incident involving eight children falling ill from carbon monoxide (CO) poisoning on a school bus prompted an investigation.
    • School buses are a potential source of CO exposure for children during transit and rest periods.

    Purpose of the Study:

    • To assess carbon monoxide (CO) levels in school buses operating in the Seattle area.
    • To determine the extent of student exposure to potentially harmful CO concentrations in school buses.

    Main Methods:

    • CO levels were measured in 33 school buses upon arrival at a ski resort.
    • An additional 65 buses were tested while idling during the lunch hour.
    • Measurements were compared against Environmental Protection Agency (EPA) exposure limits.

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    Main Results:

    • Four of 33 (12%) buses tested in-transit exceeded EPA 8-hour exposure limits for CO.
    • Two buses tested during the lunch hour had CO levels nearly three times the EPA 1-hour limit.
    • A total of 36% of buses tested had CO levels exceeding EPA standards for an 8-hour exposure.

    Conclusions:

    • A significant percentage of school buses in the Seattle area exhibit elevated carbon monoxide (CO) levels.
    • These findings indicate a potential health hazard for students due to CO exposure in school buses.
    • Recommendations were developed to mitigate the risk of CO exposure in school bus environments.