Sabesp Extends Nighttime Water Pressure Cuts to 19:00–05:00 Across Greater São Paulo

Overview

• Effective Monday, Sept. 22, the nightly reduction increases from 8 to 10 hours and now runs from 19:00 to 05:00, with daytime pressure management added to maintain supply.
• Officials say the first phase since Aug. 27 saved about 4.2 m³/s, enough to supply roughly 800,000 people for a month, which prompted the expansion.
• Reservoirs remain low, with the integrated system at about 32.8% of useful volume, Cantareira near 30.3% and Alto Tietê around 26.1%.
• Authorities warn some customers may face nighttime outages, particularly in higher areas, while properties with rooftop tanks should be less affected.
• The measure is described as preventive with no set end date and is being monitored jointly after Cantareira reached its worst September level since 2015.