São Paulo Eyes Polluted 127-Sq-Km Billings Reservoir as Water Crisis Deepens
Updated
Updated · The Guardian · Jun 4
São Paulo Eyes Polluted 127-Sq-Km Billings Reservoir as Water Crisis Deepens
1 articles · Updated · The Guardian · Jun 4
Summary
Billings reservoir, a key water source for nearly 22 million people, is under renewed scrutiny as biologist Marta Marcondes and activist Wesley Silvestre Rosa document sewage inflows, deforestation and severely degraded water quality.
At Grota Funda, Marcondes found dark, foul-smelling water and fermenting bacteria, saying a decade of worsening pollution and shrinking storage capacity risks pushing the system toward collapse.
The 127-sq-km reservoir has been contaminated by household and industrial waste, pharmaceutical residues, microplastics and fecal matter, with planners blaming neglect, flawed water policy and unchecked urban expansion.
Pressure around Billings has intensified as roughly 1.5 million people now live nearby and illegal deforestation and clandestine construction erode flood control and storage, despite protected-shoreline rules and about 20 enforcement operations this year.
That deterioration matters more because climate-driven drought is again draining São Paulo's reservoirs, and Sabesp plans to draw clean water from Billings during shortages even after a January waste-dumping incident that led to a fine.
As its water crisis looms, can São Paulo’s acclaimed utility save the reservoir it helps pollute?
São Paulo's reservoir is dying. Could solutions from other global crisis cities be the answer?
With activists murdered, can São Paulo dismantle the criminal networks destroying its main water source?
São Paulo’s Water Emergency 2026: Billings Reservoir, Pollution, and the Struggle for Equitable Access
Overview
In June 2026, São Paulo faces an escalating water crisis as climate-induced drought leads to significant reservoir depletion, even before the dry season begins. Mounting water shortages highlight the urgent approach of a new crisis, with warnings from experts that, without proactive planning, the city cannot withstand future water shocks. In response, authorities are turning to the Billings reservoir as a key part of São Paulo’s water security strategy. However, this reliance also exposes the city’s struggle with environmental degradation and the need for comprehensive solutions to ensure both water supply and long-term sustainability.