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Operating revenue (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Revenue
Revenue from sanitation services (i)	R$ 23,894,855	R$ 21,513,442	R$ 18,629,959
Construction revenue	6,225,871	5,600,332	4,863,752
Water/Sewage deduction account (FAUSP) (a)	(395,179)
Financial asset (indemnity) (ii)	9,151,310
Sales tax	(2,632,653)	(1,457,125)	(1,363,628)
Regulatory, Control and Oversight Fee (TRCF) (iii)	(98,727)	(84,593)	(74,363)
Net operating revenue	R$ 36,145,477	R$ 25,572,056	R$ 22,055,720

X

- Definition

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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