Thika Dam

  • Located in Ndakaini  in Murang’a County
  • Completed in 1994 under the Third Nairobi Water Supply Project between 1989 and 1994. 
  • Designed storage capacity is 70,000,000 m3
  • Linked to Chania River by 4KM tunnel which serves Ngethu Water Treatment Works 
  • Pipeline is 90 Km to Nairobi City 
  • Catchment area measures 75Km2
  • Main rivers that drain into the Dam are Thika, Githika and Kayuyu. 
  • Water from the dam is treated at Ng’ethu Treatment plant
  • Contributes approximately 84% of Nairobi’s current water supply.