▁water ▁services . ▁From ▁ 1 9 9 4 ▁to ▁ 2 0 0 3 ▁mult in ational ▁water ▁corpor ations ▁provided ▁an ▁increase ▁of ▁water ▁quality ▁services , ▁while ▁the ▁public ▁sector ▁held ▁control ▁of ▁infrastr ucture . ▁However , ▁recently ▁Mexico ▁City ▁has ▁faced ▁some ▁hard ships ▁in ▁water ▁priv at ization ▁due ▁to ▁contract ▁negoti ations ▁between ▁the ▁public ▁and ▁private ▁sector , ▁which ▁has ▁resulted ▁in ▁st alled ▁efficiency ▁of ▁water ▁services . ▁ ▁Boliv ia ▁▁ ▁Boliv ia ▁priv at ized ▁its ▁water ▁supply ▁in ▁the ▁city ▁of ▁C och ab amba ▁in ▁ 1 9 9 9 ▁to ▁Sem pa , ▁a ▁mult in ational ▁private ▁water ▁organization . ▁After wards , ▁Boliv ia ▁signed ▁a ▁$ 2 . 5 ▁billion ▁contract , ▁behind ▁closed ▁doors ▁for ▁C och ab amba ' s ▁water ▁system ▁to ▁Agu as ▁del ▁Tun ari . ▁The ▁priv at ization ▁of ▁C och ab amba ' s ▁water ▁supply ▁resulted ▁in ▁The ▁C och ab amba ▁Water ▁War , ▁which ▁started ▁in ▁ 1 9 9 9 ▁and ▁concluded ▁in ▁ 2 0 0 0 . ▁The ▁C och ab amba ▁Water ▁War ▁resulted ▁in ▁multiple ▁protest s ▁and ▁violent ▁out break s ▁in ▁response ▁to ▁the ▁priv at ization ▁of ▁water . ▁Agu as ▁del ▁Tun ari ▁promised ▁to ▁provide ▁electric ity ▁and ▁ir rig ation ▁to ▁C och ab amba . ▁In ▁addition , ▁Be cht el , ▁a ▁major ▁share holder ▁of ▁Agu as ▁del ▁Tun ari ,