Title
Water for All Refund Movement, Inc. vs. Manila Waterworks and Sewerage System
Case
G.R. No. 212581
Decision Date
Mar 28, 2023
A non-profit group alleged MWSS and its concessionaires discharged untreated sewage, violating environmental laws, but failed to prove harm or exhaust remedies, leading to dismissal.

Case Summary (G.R. No. 212581)

Court of Appeals’ Dismissal and Grounds

The CA dismissed WARM’s petition for: 1) failure to establish petitioner’s legal personality and standing under RPEC; 2) ambiguity regarding the combined system’s existence or implementation areas; 3) absence of prohibition in the Sanitation Code against combined systems; 4) no demonstrated causal link between alleged permit deficiencies and environmental damage; 5) lack of expert or scientific evidence; 6) prayers beyond the scope of a Writ of Kalikasan; and 7) better addressed by the Supreme Court under the Continuing Writ. Motions for reconsideration, which appended WARM’s Certificate of Incorporation, were denied for rehashing arguments.

Issues on Appeal to the Supreme Court

WARM contended the CA erred by not applying the Precautionary Principle, failing to recognize violations of multiple environmental laws and the Continuing Writ of Mandamus, and overlooking grave urgency warranting a Temporary Environmental Protection Order. It argued respondents must prove compliance before operating the combined system and that environmental damage from sewage‐contaminated floodwater is a foregone conclusion.

Supreme Court’s Analysis: Writ of Kalikasan Requirements

Under RPEC Rule 7, a Writ of Kalikasan demands proof of: (1) violation or threat to the constitutional right to a balanced and healthful ecology; (2) unlawful act or omission by a public or private entity; and (3) environmental damage of such magnitude as to prejudice inhabitants in at least two cities or provinces. Petitioners bear the burden of substantiating these elements with verified factual and scientific evidence before judicial relief may issue.

Assessment of Precautionary Principle and Evidence

The Court distinguished mere allegations from the Precautionary Principle’s application, which only applies when causal links between activity and harm are scientifically uncertain. WARM failed to present: technical descriptions of the combined system; evidence of permit absence (e.g., DENR certifications); scientific studies connecting the system to environmental damage; or statutory prohibition under RA 9275 or other laws. The Court found no per se illegality in combined drainage‐sewerage systems and noted the Clean Water Act encourages safe wastewater reuse and integrated water management.

Alternative Remedies and Administrative Exhaustion

Given WARM’s claim of permit deficiencies under PD Nos. 1151 and

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