Copasa’s “Extra Quarter” Reveals The Real Test Behind Minas Gerais’ Privatization Push

Key Points

• Copasa’s 4Q25 measured volumes rose 3.5%, but the quarter counted more consumption days than last year.
• The cleaner signal is expansion: more water and sewage connections, with sewage growing faster.
• The update lands as Minas Gerais advances privatization—reform that promises investment but risks backlash over bills.

Copasa, the Minas Gerais water and sanitation utility, reported stronger operating figures that cannot be separated from the state’s push to sell the company.

In its fourth-quarter 2025 operational update, Copasa said measured water-and-sewage volumes increased 3.5% from a year earlier. Water volume reached 179.7 million cubic meters, up 3.3%. Sewage volume reached 125.3 million cubic meters, up 3.9%.

The catch is the calendar. Copasa said 4Q25 covered 95.4 days of consumption versus 92.3 days in 4Q24, after billing adjustments linked to aligning invoicing with Brazil’s tax reform timeline. Put simply: the “quarter” was longer, so part of the gain is arithmetic.

Even with that caveat, the network is growing. Water connections rose 1.7% to 4.685 million. Sewage connections increased 2.4% to 3.267 million.

Billing units (“economies”) climbed 1.6% for water and 3.1% for sewage over 12 months—evidence of a steady push to connect more customers, especially on sewage, where expansion is harder and costlier.

That momentum now feeds a political showdown. In December, Minas Gerais lawmakers approved a bill authorizing Copasa’s privatization by a 53–19 vote after hours of procedural obstruction.

The law was sanctioned and entered into force on December 23, 2025. Backers say private ownership can speed investment and tighten governance. Critics warn that profit incentives will squeeze tariffs and jobs.

For readers outside Brazil, Copasa is a clear case study in emerging-market infrastructure: essential services, big capital needs, and political sensitivity around household bills.

The company supplies water to about 11.8 million people and provides sewage service to roughly 8.8 million, across concessions in about three-quarters of Minas Gerais municipalities.

The next steps—sale design, regulatory guardrails, and tariff discipline—will decide whether reform wins lasting consent.

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