| natural atmospheric microbial conditions in a typical suburban area. | ambient outdoor concentrations and size distributions of airborne microbial particles were measured approximately weekly for 2 years in a washington, d.c., suburban area. the study objective was to characterize microbial air quality in the vicinity of a proposed sewage sludge composting facility. during the study, 379 samples were taken at 17 stations, using andersen microbial samplers. concentration ranges (in viable particles per cubic meter) were as follows: airborne mesophilic fungi, 0 to 7, ... | 1983 | 6342536 |