TABLE 3.
Average monthly total culturable virus (MPN/liter) for Milwaukee's Jones Island WWTP influent and effluent for the period August 1994 through July 2003
| Mo | Influent mean (MPN/liter) | Influent range (MPN/liter) | Influent SD (MPN/liter) | Effluent mean (MPN/liter) | Effluent range (MPN/liter) | Effluent SD (MPN/liter) | Influent-effluent log difference of means |
|---|---|---|---|---|---|---|---|
| January | 380 | 30-1,930 | 608 | 26 | 0-233 | 77 | 1.165 |
| February | 264 | 52-867 | 299 | 3 | 0-12 | 4 | 1.944 |
| March | 322 | 40-876 | 360 | 2 | 0-6 | 3 | 2.206 |
| April | 562 | 0-2758 | 929 | 0.5 | 0-4 | 1 | 3.051 |
| May | 295 | 0-701 | 215 | 3 | 0-12 | 5 | 1.992 |
| June | 692 | 30-2,612 | 849 | 2 | 0-16 | 5 | 2.539 |
| July | 3,086 | 354-9,251 | 3,105 | 2 | 0-10 | 4 | 3.188 |
| August | 3,247 | 621-12,820 | 3,795 | 5 | 0-28 | 9 | 2.813 |
| Septembera | 2,375 | 557-5,713 | 1,732 | 4 | 0-17 | 6 | 2.773 |
| October | 1,284 | 409-3,441 | 920 | 3 | 0-8 | 4 | 2.631 |
| November | 1,457 | 176-7,264 | 2,210 | 9 | 0-74 | 24 | 2.209 |
| December | 1,779 | 73-10,187 | 3,376 | 7 | 0-62 | 21 | 2.405 |
a
Since neither WWTP influent nor effluent was collected in September 1994, the average MPN/liter for the other eight Septembers was used for September 1994 for table calculations.