Table 1 Average Enterococcus spp. and E. coli counts (MPN/100 mL) per month and site of collection
MONTH | Mean MPN/100 ml | |||
|---|---|---|---|---|
INFLUENT | EFFLUENT | UPSTREAM | DOWNSTREAM | |
Enterococcus | (n = 15) | (n = 15) | (n = 15) | (n = 15) |
May (n = 8) | 2.90E+ 05 | 4.30E+ 03 | 4.08E+ 03 | 2.33E+ 03 |
June (n = 8) | 3.89E+ 05 | 4.70E+ 02 | 1.73E+ 04 | 2.10E+ 03 |
July (n = 12) | 9.67E+ 05 | 1.03E+ 03 | 2.85E+ 04 | 6.16E+ 03 |
August (n = 8) | 1.75E+ 06 | 3.33E+ 03 | 1.99E+ 04 | 1.59E+ 03 |
September (n = 8) | 3.19E+ 06 | 2.62E+ 03 | 2.04E+ 04 | 3.87E+ 03 |
October (n = 8) | 2.53E+ 06 | 2.60E+ 02 | 4.73E+ 04 | 2.95E+ 03 |
November (n = 8) | 2.60E+ 06 | 5.45E+ 03 | 6.39E+ 04 | 1.91E+ 04 |
Arithmetic mean (Overall) | 1.63E+ 06 | 2.39E+ 03 | 2.87E+ 04 | 5.50E+ 03 |
Geometric mean (Overall) | 1.12E+ 06 | 1.36E+ 03 | 1.66E+ 04 | 3.42E+ 03 |
E. coli | ||||
 May (n = 8) | 2.19E+ 06 | 1.15E+ 03 | 2.04E+ 04 | 4.81E+ 03 |
 June(n = 8) | 1.80E+ 06 | 2.60E+ 02 | 2.73E+ 04 | 3.72E+ 03 |
 July (n = 12) | 4.38E+ 06 | 4.43E+ 02 | 4.56E+ 04 | 7.52E+ 03 |
 August (n = 8) | 3.62E+ 06 | 1.34E+ 03 | 4.26E+ 04 | 5.33E+ 03 |
 September (n = 8) | 4.84E+ 06 | 5.09E+ 03 | 1.05E+ 05 | 2.22E+ 04 |
 October (n = 8) | 4.84E+ 06 | 2.80E+ 03 | 1.34E+ 05 | 7.22E+ 03 |
 November (n = 8) | 4.84E+ 06 | 5.29E+ 03 | 2.46E+ 06 | 4.20E+ 04 |
 aArithmetic mean (Overall) | 3.83E+ 06 | 2.21E+ 03 | 3.81E+ 05 | 1.29E+ 04 |
 Geometric mean (Overall) | 3.39E+ 06 | 1.15E+ 03 | 5.75E+ 04 | 7.46E+ 03 |