In this study, assessment of rainfall variability on wetland pollutants dynamics was done. Results indicated monthly rainfall totals and anomaly increasing at non significant rate and similar faecal coliform numbers between months for all streams (p > 0.05). All streams except Concorp and Pepsi had similar Total Suspended Solids (TSS) concentration for the months (p > 0.05). Relationship of total rainfall with faecal coliforms was significantly negative and weak in Kyambogo, Banda and Outlet streams (p < 0.05). However, Pepsi and Concorp streams showed positively weak but significant relationship (P < 0.05). TSS concentration and total rainfall had significantly negative and weak relationship for Pepsi and Outlet streams (p < 0.05) while Concorp, Kyambogo and Banda streams had significantly positive but weak relationship (p < 0.05). Faecal coliform loads were similar between dry months for all streams (P > 0.05). TSS loads between dry months were significant except for Concorp stream. There was faecal coliform dilution in Kyambogo and outlet streams, and the effect was significant for TSS loads in all streams. Monthly retention ranged from 99.9 - 99.5% and 94.6 - 98.0% for faecal coliforms and TSS respectively. The study indicates that catchment designs coupled with human activities contribute to potential pollutants dynamics in wetlands.
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