TABLE 2.

Geometric means of total coliform, fecal coliform, and enterococcus counts from the Gainesville area study and number of positive PCRs for human markers of fecal pollution

SiteNo. of times sampledSingle observation or geometric mean (range) for:No. of samples positive by PCR/no. of samples testeda
Total coliforms (CFU · 100 ml−1)Fecal coliforms (MPNb · 100 ml−1)Enterococci (CFU · 100 ml−1)espHPyVsbac
S3614,003 (7,000-68,000)1,244 (540-2,400)3,231 (1,020-15,600)4/64/61/3
S4110,0003507,4000/10/10/1
S4b122,0009201,4001/10/10/1
S756,357 (2,000-12,000)786 (350-1,600)2,325 (1,200-5,640)5/66/60/2
S828,000 (2,000-32,000)593 (220-1,600)938 (400-2,200)1/22/20/2
S934,642 (2,000-10,000)412 (240-540)1,726 (600-3,200)3/33/30/2
S1146,000 (3,000-9,000)598 (280-920)2,726 (1,360-4,000)3/42/4NA
S1258,074 (3,000-44,000)861 (220-2,400)3,672 (2,000-4,800)1/51/52/3
S13P48,384 (4,000-19,000)737 (540-1,100)1,119 (700-1,600)1/41/40/3
S13R113,0005402,1600/10/1NA
S1614,0009206,2100/10/1NA
S17M22,000 (1,000-4,000)9201,824 (1,060-3,140)0/20/2NA
S18215,588 (9,000-27,000)567 (350-920)1,2000/20/2NA
S2025,916 (5,000-7,000)5403,751 (3,140-4,480)0/20/2NA
S21123,0001,6001,2001/10/10/1
S2225,196 (3,000-9,000)470 (240-920)603 (200-1,820)0/21/20/1
S2345,144 (4,000-7,000)494 (130-920)3,984 (2,000-7,960)1/41/40/1
S3127,746 (6,000-10,000)2,4003,031 (2,240-4,100)0/20/20/0
S3756,128 (4,000-18,000)866 (170-2,400)2,363 (1,980-3,200)2/52/52/2
S38612,479 (5,000-23,000)980 (170-2,400)3,649 (2,080-5,800)6/66/62/2
S39217,292 (13,000-23,000)3501,833 (1,600-2,100)1/21/20/1
S41118,0001,6002,0000/10/10/1
S41P18,0005401,1200/10/1NA
S4222,000 (1,000-4,000)639 (170-2,400)3,015 (2,840-3,200)0/20/2NA
S4315,0001,6003,7000/10/1NA
S45M25,477 (5,000-6,000)705 (540-920)1,862 (1,520-2,280)0/20/2NA
S45P24,472 (4,000-5,000)917 (350-2,400)1,874 (760-4,620)0/20/2NA
S4625,292 (4,000-7,000)748 (350-1,600)2,406 (2,160-2,680)0/20/2NA
S1001100,0002,40041,2001/11/11/1
S101162,0002,40017,8001/11/11/1
S102180,0002,40012,8001/11/11/1
S103136,0002,4006,8001/11/11/1
S104134,0002,40010,4000/10/10/1
S105166,0002,4006,0001/11/10/1
S106145,0002,4008,0001/11/11/1
S107130,0002,4008000/10/10/1
SSE210,954 (10,000-12,000)1,486 (920-2,400)3,245 (2,460-4,280)0/20/2NA
SWD13,0005401,0801/11/1NA
SWU21,0005408802/22/2NA
  • a bac, Bacteroides 16S rRNA marker. NA, PCR analysis not performed. The numbers of sampling events varied with sites.

  • b MPN, most probable number.