▁ 2 0 1 4 , ▁water ▁sales ▁double d ▁to ▁ 1 3 1 ▁million ▁cub ic ▁meters ▁per ▁year ▁and ▁the ▁number ▁of ▁household ▁connections ▁increased ▁by ▁ 1 6 5 % ▁to ▁more ▁than ▁ 6 3 8 , 0 0 0 . ▁According ▁to ▁the ▁World ▁Bank , ▁" the ▁Sen eg al ▁case ▁is ▁regarded ▁as ▁a ▁model ▁of ▁public - private ▁partners hip ▁in ▁sub - S ah aran ▁Africa ". ▁Another ▁interesting ▁feature ▁is ▁the ▁existence ▁of ▁a ▁national ▁san itation ▁company ▁in ▁charge ▁of ▁se wer age , ▁waste water ▁treatment ▁and ▁storm water ▁d rain age , ▁which ▁has ▁been ▁mode led ▁on ▁the ▁example ▁of ▁the ▁national ▁san itation ▁company ▁of ▁Tun is ia ▁and ▁is ▁unique ▁in ▁Sub - S ah aran ▁Africa . ▁ ▁Access ▁▁ ▁In ▁ 2 0 1 5 ▁ 7 5 % ▁of ▁the ▁population ▁of ▁Sen eg al ▁had ▁access ▁to ▁an ▁at ▁least ▁basic ▁water ▁source ▁and ▁ 4 8 % ▁had ▁access ▁to ▁at ▁least ▁basic ▁san itation . ▁Conc ern ing ▁water ▁supply , ▁there ▁is ▁a ▁significant ▁gap ▁between ▁urban ▁areas ▁( 9 1 % ▁access ) ▁and ▁rural ▁areas ▁( 6 3 %). ▁For ▁san itation , ▁access ▁rates ▁display ▁a ▁same ▁significant ▁gap ▁between ▁urban ▁( 6 6 %) ▁and ▁rural ▁( 3 5 %) ▁areas . ▁In ▁urban ▁areas , ▁ 7 5 % ▁have ▁access ▁to ▁water ▁connections ▁in ▁their ▁house ▁or ▁yard ▁and ▁another ▁ 1 7