The Brazilian utility installed 87km of collecting networks, 2km of pressurized networks, eight pumping stations and 9,000 sewerage connections in 19 districts.
The public works ministry will ask the supreme court to determine whether the comptroller's recommendation to cancel the tender was valid.
The state-owned enterprise agreed to acquire 90% of TCP.
The state government seeks to grant highway concessions, but also obtain funds during a trip to China.
The country's transport minister said that European and US-based funds signaled interested in relevant projects.
The frontrunner in Chile's current election campaign proposes a long-term public works plan that includes highway concessions and expanding Santiago's subway system.