TABLE 5.

Protozoan results

Sample site and no.No. of cysts/g wet sediment
GiardiaCryptosporidium
Nairn
    18.20
    29.20
    300
    400
    55.80
    Expected valuea4.64 (range, 0-8b)0
Saybrook
    63.90
    732.80
    Expected valuea18.35 (range, 7-23b)0
Jackson
    114.50
    1200
    1300
    142.610
    1500
    162.60
    Expected valuea1.62 (range, 0-5b)1.67 (range, 0-5b)
Basking Ridge
    800
    900
    1000
    Expected valuea00
  • a Due to the relatively small sample size, it was not possible to fully characterize the distribution of the protozoan data. Therefore, it was assumed that the data came from a Poisson distribution.

  • b Ranges reflect upper and lower confidence intervals of the expected values.