Many drains, ditches, and streams are blocked by sand and other accumulated rubbish, restricting the flow of water. In some areas this may be also be due to drains and ditches being used as dumping sites, with road users not properly disposing of garbage. During the rainy season, these blockages are likely to lead to flooding – the blocked drainage system cannot allow for rainwater to flow out of the city.
mikondo mingi ya maji pamoja na mifereji imezibwa na michanga na uchafu ivyo kuzuia utiririkaji wa maji,kwa baadhi ya maeneo tatizo hili huchangiwa na utupaji taka katika mifereji na mikondo maji pamoja na watumiaji barabara kutotupa taka mahala husika.katika kipindi cha mvua taka hizi husababisha ufurikaji maji kutokana na mitaro yenye taka kushindwa kuruhusu maji kutiririka kutoka katika sehemu tofauti za jiji.