Metropolitan Consulting Group: VEWA - Vergleich europaeischer Wasser- und Abwasserpreise, p. 4 of the executive summary [1] The study states that its methodology allows for an accurate comparison, including water used to flush pipes and for firefighting.
Altinbilek, Dogan (2006). "Water Management in Istanbul". International Journal of Water Resources Development. 22 (2): 241–253. doi:10.1080/07900620600709563. S2CID153480716.
Altinbilek, Dogan (2006). "Water Management in Istanbul". International Journal of Water Resources Development. 22 (2): 241–253. doi:10.1080/07900620600709563. S2CID153480716.
Whichwaynigeria.net:Regulating to revive water supply in urban NigeriaArchived 2009-12-08 at the Wayback Machine, August 22, 2009 by JOACHIM EZEJI, accessed on November 29, 2009. The author quotes a 2003 World Bank report saying that: "Lagos State Water Corporation holds the dubious distinction of having the highest recorded level of unaccounted-for-water in the world. Only 4 percent of its water production capacity goes towards the creation of revenue."
Whichwaynigeria.net:Regulating to revive water supply in urban NigeriaArchived 2009-12-08 at the Wayback Machine, August 22, 2009 by JOACHIM EZEJI, accessed on November 29, 2009. The author quotes a 2003 World Bank report saying that: "Lagos State Water Corporation holds the dubious distinction of having the highest recorded level of unaccounted-for-water in the world. Only 4 percent of its water production capacity goes towards the creation of revenue."