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28 Operating revenue
 12 Months Ended
Dec. 31, 2020
Operating Revenue  
Operating revenue
28 Operating revenue

 

(a) Revenue from sanitation services:

 

  2020 2019 2018
       
Metropolitan Region of São Paulo 10,722,384 11,849,776 10,295,509
Regional Systems 4,435,396 4,284,256 3,958,100
Total 15,157,780 16,134,032 14,253,609

 

(b) Reconciliation between gross operating income and net operating income:

 

  2020 2019 2018
       
Revenue from sanitation services (i) 15,157,780 16,134,032 14,253,609
Construction revenue 3,716,616 2,946,566 2,802,670
Sales tax (1,009,358) (1,035,051) (916,808)
Regulatory, Control and Oversight Fee (TRCF) (67,497) (61,893) (54,377)
Net revenue 17,797,541 17,983,654 16,085,094

 

  (i) Includes the amount of R$ 72,962 corresponding to the TRCF charged from customers from the municipalities regulated by ARSESP (R$ 70,122 in 2019).