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Sunass Sticks to 6% Cap on LimaCallao Water Rates as Sedapal Seeks 12%

The dispute turns on a 2023 overhaul that moved the allowed profit rate outside the regulator, reshaping how water bills are calculated.

Overview

  • Sunass said Sedapal’s request for a further increase is still under evaluation, with any adjustment now reported as pushed from February to June 2026.
  • Regulators defend a 5–6% ceiling and reject Sedapal’s roughly 12% push tied to a higher rate of return, estimating an 8% WACC would yield about a 35% jump versus the earlier 4.22% benchmark.
  • Sunass cautioned that another rise could occur in 2027 depending on the outcome of Sedapal’s reconsideration over the profit-rate formula.
  • Sedapal alleges calculation errors and a cash deficit of about S/500 million and says roughly S/400 million from tariffs would help finance projects like Planta 3 and the Ventanilla wastewater plant totaling around S/1,000 million.
  • Congress’s Consumer Defense Commission pressed for service improvements, criticized absent officials, and called to review the 2023 decree as the Housing Ministry floated bill installment relief starting in July.