TABLE 6.

Cryptosporidium oocyst detections and concentrations of E. coli, C. perfringens, somatic and F-specific coliphage, and water quality constituents in stream water samplesa

Stream water siteStream flow conditionCryptosporidiumE. coli (CFU/ 100 ml)C. perfringens (CFU/ 100 ml)Somatic coliphage (PFU/100 ml)F-specific coliphage (PFU/100 ml)Nitrite plus nitrate (mg/liter)Total phosphorus (mg/liter)
Oocysts (per 10 liters)Vol examined (liters)Estimated oocysts adjusted for avg recovery (per 10 liters)
Alabama 1Elevated19.062602012091.520.177
Alabama 2aElevated08.0<27121811.310.002
Alabama 2bElevated65.0801,800250>3,0005NDND
Colorado 1Effluent33.0183024018023NDND
Colorado 2Elevated09.2<619150440357.020.910
Georgia 1Base08.3<13231201532.720.070
Georgia 1High05.0<17730190220500.830.136
Georgia 2High05.3<222,000470250660.600.170
IndianaElevated09.2<41106774<10.920.135
IowaBase09.0<4112046<117.80.015
IowaHigh05.0<66510200200421.10.490
LouisianaBase09.5<239020030150.080.380
LouisianaElevated07.5<62,2002708003600.350.310
NebraskaHigh01.6<21518,0009001,400293.371.09
NebraskaBase09.5<377017<10.960.163
OhioElevated09.2<520030260104.100.080
OhioHigh09.5<22108015034.570.061
South Carolina 1Base09.5<314045150842.190.010
South Carolina 1Elevated010.2<3180150270<11.980.049
South Carolina 2Elevated08.3<6932601120.230.055
TexasElevated04.0<171605613042.050.490
TexasBase28.5102,7001003168.431.94
Virginia 1Base08.8<741351010.650.033
Virginia 2Elevated09.8<31222480<16.620.069
Washington 1aBase1104300281,3006200.870.188
Washington 1bBase010<41709024<12.960.266
Washington 2High08.8<97704009450.430.156
Wisconsin 1High01.7<3313,0001902,800<14.970.620
Wisconsin 2Base04.6<7100120165<0.050.180
Wisconsin 2High06.2<5<1200100<10.970.126
Median18012014041.750.160
  • a ND, not determined.