Water for All Refund Movement, Inc. vs. Manila Waterworks and Sewerage System

A petition for a Writ of Kalikasan requires the petitioner to substantiate with actual evidence all three elements of the writ, including environmental damage of such magnitude as to prejudice inhabitants in two or more cities or provinces; the Precautionary Principle cannot substitute for the total absence of evidence, as it applies only when there is insufficient or uncertain scientific evidence of a causal link between human activity and environmental effect, not when there is pure allegation.

MWSS is a government agency created under Republic Act No. 6234, mandated to ensure an uninterrupted and adequate supply of potable water and the proper operation and maintenance of sewerage systems within Metro Manila, Rizal, and a portion of Cavite. On February 21, 1997, MWSS entered into 25-year concession agreements with Manila Water Company, Inc. (for the East Zone) and Maynilad Water Systems, Inc. (for the West Zone), requiring the concessionaires to expand water and sewerage coverage, provide uninterrupted supply, and increase water pressure during the concession period. WARM is a non-stock non-profit corporation claiming to be composed of MWSS consumers, with corporate purpose to serve as a watchdog for water consumer rights and the enforcement of environmental obligations.

WARM, an organization claiming to be composed of MWSS consumers with a corporate purpose of serving as a watchdog for water consumer rights, filed a petition for a Writ of Kalikasan before the Court of Appeals. The petition alleged that public respondent MWSS and its concessionaires, private respondents Manila Water and Maynilad, were implementing a "combined drainage-sewerage system" without the necessary permits from the DENR and DOH. According to WARM, such a system collected rainwater and raw sewage in a single pipe, and when rainfall exceeded the system's capacity, a mixture of raw sewage and rainwater was discharged directly into bodies of water without treatment — equivalent, WARM asserted, to dumping highly toxic raw sewage into natural waters, an act prohibited by law.

WARM asserted that sometime in 2007, the concessionaires indicated in their Business Plans submitted to the MWSS-Regulatory Office that they would implement a combined drainage system for the collection of raw sewage and rainwater. At separate meetings, both Manila Water and Maynilad manifested to the MWSS-RO that the intended project was compliant with DENR requirements and that an Environmental Clearance Certificate would be secured. WARM linked its objection to the combined drainage-sewerage system to the environmental surcharge imposed on water consumers for both sewered and unsewered lines, arguing that the collection of charges that did not go into actual environmental remediation violated the Polluter Pays Principle. WARM cited violations of Section 4 of PD No. 1151, Sections 72 to 74 of PD No. 856 (Code on Sanitation), Article 75 of PD No. 1067 (Water Code), Sections 8, 27(a), and 27(e) of RA No. 9275 (Clean Water Act), and the Writ of Continuing Mandamus issued in MMDA vs. Concerned Citizens of Manila Bay. Notably, WARM did not implead the DENR or any of its bureaus as respondents.

The Court of Appeals dismissed the petition on July 26, 2013, citing multiple defects: WARM's incorporation was not evidenced, the areas where the combined sewerage system was installed were not identified, the cited provisions of the Code on Sanitation did not prohibit combined systems, the relation between the alleged violations and environmental damage was not established, no scientific or expert studies were presented linking the system to environmental damage, the prayer for accounting of environmental fees was outside the writ's ambit, and the violation of the Continuing Writ of Mandamus was better addressed to the Supreme Court. WARM filed two motions for reconsideration, attaching its Certificate of Incorporation dated November 3, 2011, but the CA denied them on May 12, 2014, finding the arguments a mere rehash with no cogent reason to reconsider the dismissal.

• Precautionary Principle: WARM argued that the CA failed to apply acknowledged principles of environmental law, particularly the Precautionary Principle, which requires courts to espouse prudence where risk of environmental harm is uncertain but plausible and to take precaution against grave risks where there is lack of full scientific certainty to prove inevitable occurrence.
• Violation of Environmental Laws: WARM argued that respondents violated various environmental laws — PD No. 1151, PD No. 856, PD No. 1067, and RA No. 9275 — as well as the Writ of Continuing Mandamus in MMDA vs. Concerned Citizens of Manila Bay, by operating a combined sewerage system without an Environmental Clearance Certificate prior to commencement of operations.
• Environmental Damage: WARM argued that the CA failed to recognize environmental damage caused by the dumping of raw sewage during heavy rain, citing the CA's own decision in CA-G.R. SP No. 112023 and a certification from the Philippine Medical Association, and that the CA committed error by reaching such conclusion without a hearing.
• Failure to Operate Sewerage System: WARM argued that respondents' failure to properly operate and maintain a sewerage system over its service contract area in accordance with recognized environmental standards was in and of itself a violation of environmental law remediable by a Writ of Kalikasan.
• Continuing Mandamus Violation: WARM argued that respondents' failure to comply with the Continuing Writ of Mandamus was itself a violation of environmental law remediable through a Writ of Kalikasan, and that jurisdiction over the dispute could not now be denied since it was before the Supreme Court.
• Urgency for TEPO: WARM argued that a situation of extreme urgency, grave injustice, and irreparable injury existed justifying the issuance of a Temporary Environmental Protection Order, given the dangers of sewage-contaminated floodwater threatening the steps of the Supreme Court and the Court of Appeals, which may be taken by judicial notice.

• Elements of Writ of Kalikasan: Whether WARM established the elements for the issuance of a Writ of Kalikasan, namely: (1) actual or threatened violation of the constitutional right to a balanced and healthful ecology; (2) arising from an unlawful act or omission of a public official or private entity; and (3) involving environmental damage of such magnitude as to prejudice inhabitants in two or more cities or provinces.
• Precautionary Principle: Whether the Precautionary Principle may be invoked to substitute for the total absence of evidence in a petition for a Writ of Kalikasan.
• Exhaustion of Administrative Remedies: Whether WARM should have exhausted administrative remedies before the DENR before seeking judicial intervention through a Writ of Kalikasan.

• Elements of Writ of Kalikasan: No. WARM failed to substantiate any of the three elements, presenting only bare allegations without scientific evidence of the existence, technical aspects, or environmental damage from a combined drainage-sewerage system.
• Precautionary Principle: No. The Precautionary Principle applies only when there is uncertain but plausible scientific evidence of a causal link between human activity and environmental effect; it cannot substitute for pure allegation lacking in evidence.
• Exhaustion of Administrative Remedies: Yes. WARM should have availed of administrative remedies before the DENR, the primary agency mandated to implement environmental policies, before seeking the extraordinary judicial remedy of a Writ of Kalikasan.

• Elements of Writ of Kalikasan: The elements for the issuance of a Writ of Kalikasan are: (1) actual or threatened violation of the constitutional right to a balanced and healthful ecology; (2) arising from an unlawful act or omission of a public official or employee, or private individual or entity; and (3) involving environmental damage of such magnitude as to prejudice the life, health, or property of inhabitants in two or more cities or provinces. The party seeking the writ carries the burden of substantiating these elements and must be ready with the evidence necessary for the determination of the writ's issuance. WARM's evidence consisted of bare allegations: it did not present evidence of the existence and specific technical aspects of the combined drainage-sewerage system, how it is objectionable per se, its operation without necessary permits under PD Nos. 1151 and 1586, or the causal link between the system and resulting environmental damage. It did not implead the DENR or obtain a negative certification from the DENR stating the absence of a permit or ECC. Nothing in RA 9275 prohibits the operation of a combined drainage-sewerage system, and without the technical description of the system, other provisions of the CWA covering safe re-use of wastewater cannot be precluded. The magnitude of environmental damage is a condition sine qua non that must be contained in the verified petition and proven with substantial evidence.

• Precautionary Principle: Section 1, Rule 20 of the RPEC provides that "when there is lack of full scientific certainty in establishing a causal link between human activity and environmental effect, the court shall apply the precautionary principle." In West Tower Condominium Corp. vs. First Phil. Industrial Corp., the Court ruled that the principle applies only when the link between cause and effect cannot be established with full scientific certainty. There is a critical difference between insufficient and/or uncertain evidence, which allows application of the Precautionary Principle, and pure allegation lacking in evidence, which does not. WARM's petition not only failed to provide a causal link but likewise did not provide the scientific basis for its particular objection to the combined drainage-sewerage system or submit any evidence of resulting environmental damage. The claimed operation without permits is a far stretch from determining whether such a system is irregular and illegal per se. WARM only speculated on environmental damage from purported discharge of "sewage-contaminated floodwater" without providing specific scenarios with scientific evidence or a survey of relevant literature.

• Exhaustion of Administrative Remedies: Under the doctrine of exhaustion of administrative remedies and its corollary doctrine of primary jurisdiction, before a party may seek judicial intervention, it should first avail of all means afforded by administrative processes. Issues within the jurisdiction of administrative agencies should not be summarily taken to court without first giving the agency the opportunity to resolve them after due deliberation. DENR DAO 2003-30, the implementing rules of PD 1586, provides for fines, penalties, sanctions, and Cease and Desist Orders that the EMB may issue. WARM could have availed of this administrative remedy to assail respondents' alleged operation without necessary permits. As ruled in Abogado vs. DENR, the Writ of Kalikasan should not supplant other available remedies; it is a highly prerogative writ that issues only when there is actual or imminent threat and inaction by relevant administrative bodies making environmental catastrophe inevitable. It is not an excuse to invoke judicial remedies when administrative forums remain available to properly address the concern to protect and advance ecological rights.

• Writ of Kalikasan — A special civil action and extraordinary remedy under Section 1, Rule 7, Part III of the RPEC, available to a natural or juridical person, entity authorized by law, people's organization, NGO, or public interest group accredited by or registered with any government agency, on behalf of persons whose constitutional right to a balanced and healthful ecology is violated or threatened by an unlawful act or omission involving environmental damage of such magnitude as to prejudice the life, health, or property of inhabitants in two or more cities or provinces. The elements are: (1) actual or threatened violation of the constitutional right to a balanced and healthful ecology; (2) arising from an unlawful act or omission of a public official or employee, or private individual or entity; and (3) involving environmental damage of such magnitude as to prejudice inhabitants in two or more cities or provinces. The petitioner carries the burden of substantiating these elements with actual evidence. The writ cannot and should not substitute other available remedies, whether legal, administrative, or political.

• Precautionary Principle — Under Section 1, Rule 20, Part V of the RPEC, when there is lack of full scientific certainty in establishing a causal link between human activity and environmental effect, the court shall apply the precautionary principle, giving the constitutional right to a balanced and healthful ecology the benefit of the doubt. The principle applies only when there is uncertain but plausible scientific evidence of a causal link; it cannot substitute for the total absence of evidence. The Court distinguished between insufficient and/or uncertain evidence (which permits application of the principle) and pure allegation lacking in evidence (which does not).

• Exhaustion of Administrative Remedies and Primary Jurisdiction — Before a party may seek judicial intervention, it should first avail of all means afforded by administrative processes. Courts cannot or will not determine a controversy involving a question within the jurisdiction of an administrative tribunal prior to resolution by that tribunal, where the question demands exercise of sound administrative discretion requiring special knowledge, experience, and services of the administrative tribunal to determine technical and intricate matters of fact. A Writ of Kalikasan cannot substitute other available remedies; it issues only when there is actual or imminent threat and inaction by relevant administrative bodies making environmental catastrophe inevitable.

• "There is a difference between insufficient and/or uncertain evidence which allows for the application of the Precautionary Principle in environmental law cases, on one hand, and that of pure allegation and lacking in evidence, on the other." — This passage states the ratio decidendi on why WARM's invocation of the Precautionary Principle failed, drawing the critical distinction between uncertain evidence and no evidence at all.

• "A Writ of Kalikasan cannot and should not substitute other remedies that may be available to the parties, whether legal, administrative, or political." — This defines the writ's limited scope and its relationship to administrative remedies, reinforcing the doctrine of exhaustion of administrative remedies.

• "Under the guise of claiming environmental damage and harm, WARM and other parties praying for the issuance of a Writ of Kalikasan must not expect courts of law to ascertain environmental damage where none is alleged, much less proven." — This articulates the evidentiary burden on petitioners for the writ, emphasizing that courts cannot supply what the petitioner fails to allege or prove.

• "The possibility of irreversible and serious harm is not established by obsolete and irrelevant data such as that presented in this case." — This underscores that the standard for proving environmental damage of the magnitude required for a Writ of Kalikasan demands current, relevant, and scientifically grounded evidence.

• West Tower Condominium Corp. vs. First Phil. Industrial Corp., 760 Phil. 304 (2015) — Controlling precedent on the Precautionary Principle. The Court followed its ruling that the principle applies only when the causal link between human activity and environmental effect cannot be established with full scientific certainty, and distinguished it from cases involving pure allegation with no evidence.

• LNL Archipelago Minerals, Inc. vs. Agham Party List, 784 Phil. 456 (2016) — Followed for the rule that a Writ of Kalikasan petitioner bears the burden to prove the environmental law violated, the act or omission complained of, and the environmental damage of such magnitude as to prejudice inhabitants in two or more cities or provinces.

• Abogado vs. Department of Environment and Natural Resources, G.R. No. 246209, September 3, 2019 — Followed for the principle that the Writ of Kalikasan should not supplant other available remedies and issues only when there is actual or imminent threat and inaction by administrative bodies that would make environmental catastrophe inevitable.

• Braga vs. Abaya, 794 Phil. 662 (2016) — Followed for the rule that allegations of environmental harm must identify particular threats from the project itself and that speculative, hazy allegations are insufficient to warrant a Writ of Kalikasan.

• MMDA vs. Concerned Citizens of Manila Bay, 595 Phil. 305 (2008) — Distinguished; WARM cited it but the Court found it inapplicable and irrelevant because there was no mention in that case of the validity of a combined drainage-sewerage system or its purported environmental damage.

• Section 1, Rule 7, Part III, Rules of Procedure for Environmental Cases (A.M. No. 09-6-8-SC) — Defines the nature of the Writ of Kalikasan, who may avail of it, and the three elements required. Applied to determine that WARM failed to satisfy the requisites for the writ's issuance.

• Section 2, Rule 7, Part III, RPEC — Specifies the contents of the verified petition, including the environmental law violated, the act or omission complained of, and the environmental damage of such magnitude as to prejudice inhabitants in two or more cities or provinces. Applied to show WARM's evidence was deficient against the required contents.

• Section 1, Rule 20, Part V, RPEC — Defines the Precautionary Principle: when there is lack of full scientific certainty in establishing a causal link between human activity and environmental effect, the court shall apply the precautionary principle. Applied to distinguish uncertain evidence (permitting the principle's application) from pure allegation (not permitting it).

• Section 8, Republic Act No. 9275 (Clean Water Act of 2004) — Requires water supply and sewerage concessionaires in Metro Manila and highly urbanized cities to connect existing sewage lines to available sewerage systems. WARM cited it as violated, but the Court found nothing in RA 9275 that prohibits a combined drainage-sewerage system.

• Sections 72 to 74, PD No. 856 (Code on Sanitation of the Philippines) — Governs supervision of sewage systems, operation of sewage treatment works, and requirements for sewerage works. The CA found that Section 74(c) expressly states that the prohibition on mixing storm water and sanitary sewage "should not prevent the installation of a combined system."

• Article 75, PD No. 1067 (Water Code of the Philippines) — Prohibits building works that may introduce sewage, industrial waste, or pollutants into any source of water supply without prior permission. Cited by WARM as violated by respondents.

• Section 4, PD No. 1151 (Philippine Environmental Policy) — Requires environmental impact statements for actions, projects, or undertakings that significantly affect the quality of the environment. Cited by WARM as violated.

• PD No. 1586 (Establishing an Environmental Impact Statement System) — Establishes the EIS System requiring an ECC or Certificate of Non-Coverage for projects. WARM alleged respondents operated without an ECC; the Court noted WARM should have pursued this administratively with the DENR.

• DENR DAO 2003-30 — Implementing rules and regulations of PD 1586, providing for fines, penalties, sanctions, and Cease and Desist Orders that the EMB Central or Regional Office Directors may impose. The Court noted WARM could have availed of this administrative remedy.

Gesmundo, C.J., Caguioa, Lazaro-Javier, Inting, Zalameda, M. Lopez, Gaerlan, Rosario, J. Lopez, Dimaampao, Marquez, Kho, Jr., and Singh, JJ., concurred. Leonen, SAJ., on official leave.