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#leakage

Issues, solutions, and case studies for leakage

Issues 2

#00175Day Zero by decay: leakage and underinvestment collapse urban supply without drought

Some cities run dry not from drought but from decades of underinvestment. Johannesburg loses ~45% of its water to leaks and illegal connections and endures rolling outages even when reservoirs hold water; Mexico City loses ~40%.

#00039Leakage: protecting one biome or commodity displaces clearing to less-protected savannas and dry forests

Protecting one biome or commodity can just displace clearing to the next. The Amazon Soy Moratorium shielded rainforest but pushed soy and pasture into the less-protected Cerrado savanna, now often the hardest-hit biome. Savannas and dry forests get weaker legal protection.

national

Solutions 2

#00190Run water as a public utility with a reinvestment mandate and a standing leak-reduction program

Reform water governance so operating margins are locked into a reinvestment mandate—pipe renewal, leak detection, and repair—rather than extracted as profit or dispersed by weak management. A public regie has a structural advantage in drying climates: it is not penalized by selli

city

#00186Interconnect small networks, cut leaks and secure backup sources before crisis

Physically link neighboring communal water networks, repair leaking rural pipes, and pre-identify backup sources so no small commune depends on a single vulnerable well or spring. In France, financed via agences de l'eau and départements, typically carried by intercommunal syndic

region

Case studies 3

SEMAPA (municipal utility) with citizen board seats; self-built water committees in Zona Sur · since 2000 · City

Cochabamba is a critical cautionary case: in 2000 the 'water war' expelled the Bechtel-led concession after tariff hikes, and SEMAPA returned to public control with citizen seats on its board. Fifteen or more years late…

Non-revenue water at SEMAPA, 15+ years after remunicipalization~40-50%percent
Water price paid by tanker-dependent Zona Sur households vs. network price5-10x network pricesmultiple of network price

Municipal utility revenues; community self-funding for Zona Sur water committees · 1 source

Arnaud Gissinger

Eau de Paris (municipal regie), City of Paris · since 2010 · City

On 1 January 2010 the City of Paris replaced its Veolia and Suez water distribution contracts with a single municipal regie, Eau de Paris. The regie cut prices 8% in 2010–11, invested 560 million EUR in the network and…

Estimated annual gains from remunicipalization~35 million EUR/yr (operator's own figure, partly debated as accounting-perimeter effects)EUR/yr
Water price change at transition-8%percent

Water tariff revenues retained within the public regie · 1 source

Arnaud Gissinger

Communes and intercommunal water services, with the Préfecture des Pyrénées-Orientales · since 2023 · Region

In April 2023, four villages (~3,000 residents) in Pyrénées-Orientales were placed under a tap water drinking ban when their shared well fell to 30 cm above the pump intake. Emergency response was improvised: free bottl…

Residents under tap water drinking ban3000people
Well level above pump at crisis point30cm

Communal budgets, département and agence de l'eau support; emergency bottled water provided free to residents · 1 source

Arnaud Gissinger

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