**4.1 Effect of vermifilter and control biofilter on the turbidity of the sewage water**

The turbidity level of sewage water treated using the two filters was significantly different from untreated sewage. However, no significant differences were observed in turbidity of water treated using the two filters. The percentage reduction was higher in the VF at 83–99% and at the CF it was 77–97% (**Figure 1**).

Bars shown using different letters were significantly different at 5% level of significance. The vertical bars shown at the top of each bar show the standard error of difference of means.
