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Operating revenue (Details) - BRL (R$) R$ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Notes and other explanatory information [abstract] |  |
Revenue from sanitation services (i) | R$ 5,661,099 | R$ 4,909,274
Construction revenue | 1,336,778 | 1,179,534
Sales tax | (410,786) | (370,298)
Regulation, Control and Oversight Fee (TRCF) | (26,845) | (20,141)
Net revenue | R$ 6,560,246 | R$ 5,698,369

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