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v3.21.1

1. Operations (Tables) | 12 Months Ended
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Dec. 31, 2020
Operations [abstract] |
Schedule of concession agreements | The table below shows a summary of the contractual situation of the municipalities served:
| December 31, 2020 | December 31, 2019
Total municipalities that have already signed contracts (*) | 342 | 325
Balance – intangible and contract assets | 39,440,568 | 35,990,087
Percentage of intangible and contract assets | 93.08% | 90.10%
Revenue from sanitation services (excluding construction revenue) | 14,406,803 | 13,700,777
Percentage of revenue from sanitation services (excluding construction revenue) | 95.05% | 84.92%
Municipalities with expired: | 8 | 21
Balance – intangible and contract assets | 264,931 | 1,637,878
Percentage of intangible and contract assets | 0.63% | 4.10%
Revenue from sanitation services (excluding construction revenue) | 39,088 | 451,603
Percentage of revenue from sanitation services (excluding construction revenue) | 0.26% | 2.80%
Municipalities with concession agreements due by 2030: | 25 | 27
Balance – intangible and contract assets | 1,436,529 | 1,181,172
Percentage of intangible and contract assets | 3.39% | 2.96%
Revenue from sanitation services (excluding construction revenue) | 597,483 | 588,628
Percentage of revenue from sanitation services (excluding construction revenue) | 3.94% | 3.65%
Municipality of São Paulo: |  |
Percentage of intangible and contract assets | 37.94% | 43.37%
Percentage of revenue from sanitation services (excluding construction revenue) | 44.58% | 44.48%
(*) Includes the municipality of Tapiratiba, which signed a contract in October 2019, to begin operating in April 2020.

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