APPLYING BACTERIOLOGICAL PARAMETERS TO RECREATIONAL WATER QUALITY

fall, contamination that might be associated with vegetation could enter surface waters by way of stormwater drainage.5 The few fecal coliforms that have been detected on vegetation are derived from animal manure or night soil used as fertilizers, or by contact with contaminated insect pollinators and agricultural pests.6 Insects that spend part of their life cycle associated with animal dung may be expected to transmit variable numbers of fecal coliforms in low densities. Conversely, fish, vegetation, and soil in remote regions rarely contain any fecal coliforms and the few occurrences are probably related to random contamination from wild life. Typical fecal coliform densities that would be expected to be present in soil and on insects and vegetation are shown in Fig. 3. Nonaerogenic Growths at 44.5 °C

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