Action Maps / Action Map 2
Mud, fertilizer and sewage washing off the land can ruin a coral nursery, so choosing where to restore starts on land.
Photo: Vyacheslav Argenberg, CC BY 4.0
Level 2 of 10 · −6 m
Your progressThe three lowest-effort first moves for this Action Map. Cost levels are qualitative estimates, not quotes.
Why it matters
Sediment, nutrients and organic matter reduce coral growth and recruitment and favour algae (Fabricius 2005, terrestrial runoff and coral reefs; Bartley et al. 2014, sediment and watersheds).
What it takes
Why it matters
Washing dishes in a tub with phosphate-free soap and landing the greywater keeps nutrients off the reef. RA 9275 already sets the clean-water policy (Philippine Clean Water Act of 2004 (RA 9275)).
What it takes
Why it matters
Oxybenzone harmed coral larvae in lab tests (Downs et al. 2016, oxybenzone effects on coral planulae). A short briefing plus rash guards means less product in the water.
What it takes
Clean water decides whether every other Action Map can work. Philippine reefs near towns and tourism hubs face familiar pressures: sewage, runoff from construction and roads, and heavy boat traffic. This roadmap moves from cheap habits and desk research to supporting the municipal systems that make the real difference.
From the easiest work to the most advanced. In planning, and not legal advice.
Stage 1: Beginner
Begin with a desk review of what drains onto a candidate reef: rivers and creeks, sewage and septic systems, stormwater, coastal construction and boat traffic. Use LGU and DENR-EMB documents (and PCSD documents in Palawan) and the frameworks in Fabricius 2005, terrestrial runoff and coral reefs; Bartley et al. 2014, sediment and watersheds, which separate dissolved nutrients, organic matter, turbidity and sediment as distinct stressors. Read the Clean Water Act (Philippine Clean Water Act of 2004 (RA 9275)) and RA 8970 on hard surfactants (RA 8970, prohibition on hard surfactants in laundry and industrial detergents) as written. At the same time, start two voluntary, low-cost habits with willing operators: dish-washing in a tub with phosphate-free soap and landing the greywater, and a short snorkeler briefing on sunscreen ingredients and rash guards (Downs et al. 2016, oxybenzone effects on coral planulae).
Ready for the next step when: The drainage desk review is complete, and at least a few boats are using the dish-wash practice.
Stage 2: Intermediate
Turn habits into a small, measured trial. With the LGU and boat associations, track how many boats adopt the dish-wash practice and what guests think of the briefing. If a local producer wants to trial a mineral sunscreen or a phosphate-free boat soap, keep the run small and the label ingredient-honest; this review found no Philippine rule that defines “reef-safe,” so no legal claim is made. Ask Filipino scientists, such as UP MSI, Silliman IEMS or WPU, which signed a 2025 MOA for new research stations in El Nido, Palawan (Palawan News, 13 Oct 2025 — WPU, DENR-MIMAROPA and PSU MOA for El Nido research stations), whether a simple bioindicator plan (Cooper et al. 2009, water-quality bioindicators) would help them track water quality over time.
Ready for the next step when: Trial results are written up, and Filipino scientists have chosen whether to run a bioindicator plan.
Stage 3: Advanced
The interventions that change reef water quality most are municipal: sewage treatment, stormwater control, and upland erosion control. The center’s advanced role is to support the LGU and DENR-EMB on those systems with evidence, education and, where welcome, funding, rather than running parallel infrastructure. Continue the product pilots only if the trial data, partners and the LGU support it. Report results openly, including what did not work. Any coral or in-water step is led by a Filipino institution that holds the BFAR permits, under a written MOA. The center funds and supports; coral is never sold; and education stays non-formal. Clean water raises the odds that every later Action Map, from nurseries to larval work, succeeds.
Ready for the next step when: The LGU and agencies see the center as a reliable supporter of sewage, stormwater and erosion work.
NOAA’s own coral tutorial states that good water quality — low turbidity, low pollutants, balanced temperature and oxygen — is critical if a restored reef is to remain healthy (NOAA Ocean Service).
Feeds Gardening, Larval Reseeding, Creating New Reefs, and Preservation. Is fed by Community (land use, sewage, farming) and Philippines & Coral Triangle (local regulation and catchments).
Explains how microbes respond to fishing and nutrient stress and can tip reefs from coral- to algae-dominated states.
Action Map 2: Water Quality & Watersheds · paperback
Filter this Action Map’s papers by the action they help you take — Preserve, Conserve, Restore, Protect or Regenerate.
Loading research for this Action Map…
Cleaning the water is a first-order job for reefs across the Philippines, from fast-growing tourism towns to busy fishing coasts: sediment, nutrients and sewage can undo both protection and later restoration.
In planning, and not legal advice. This is a working educational plan for a center that is not yet operating or permitted. Confirm every permit with Philippine counsel, BFAR, DENR (including the Biodiversity Management Bureau and the Protected Area Management Board of any protected area), DENR-EMB, the relevant LGU and, in Palawan, the PCSD, before any field work.
Who can lead in-water coral work. Gathering, possessing, selling or exporting corals is generally unlawful in the Philippines, except for scientific or research purposes under a special permit from the Department of Agriculture / BFAR (Philippine Fisheries Code of 1998, Sec. 91 (RA 8550); BFAR FAO 202, s. 2000, Ban on Coral Exploitation and Exportation). Collection and conservation breeding of aquatic wildlife, including coral, is also regulated under FAO 233, issued pursuant to the Wildlife Act, and typically requires a Gratuitous Permit or related BFAR authority (FAO 233 (2010), Aquatic Wildlife Conservation; FAO 233 text (FAOLEX); Wildlife Resources Conservation and Protection Act (RA 9147)). The Constitution reserves exploration, development and utilization of natural resources to Filipino citizens or corporations at least 60% Filipino-owned, and the 13th Regular Foreign Investment Negative List reserves utilization of marine resources in archipelagic waters, the territorial sea and the EEZ to Philippine nationals (1987 Constitution, Art. XII, Sec. 2; 13th Regular Foreign Investment Negative List (EO 113, s. 2026)). For those reasons, any in-water coral work contemplated here would be led by Filipino scientific and community partners, not by a foreign principal acting alone.
The permit chain (to be confirmed site by site, anywhere in the Philippines) generally includes: review by the Protected Area Management Board where a site lies inside a protected area under the Expanded NIPAS Act (Expanded NIPAS Act of 2018 (RA 11038)); an Environmental Compliance Certificate or Certificate of Non-Coverage from DENR-EMB under the EIS System (PD 1586 / Philippine EIS System (DENR-EMB ECC/CNC)); BFAR authority for any coral handling; and local government permits. Municipal fisherfolk have preferential rights in municipal waters under the Fisheries Code. Some regions add their own layer. In Palawan, for example, that means Palawan Council for Sustainable Development (PCSD) zoning/ECAN certification and SEP clearance under RA 7611 (Strategic Environmental Plan for Palawan Act (RA 7611)); and, at El Nido, review by the Protected Area Management Board of the El Nido–Taytay Managed Resource Protected Area (Presidential Proclamation No. 32, s. 1998 (ENTMRPA)).
Existing work across the country. Filipino institutions already lead reef science and restoration nationwide: the University of the Philippines Marine Science Institute and the Marine Environment and Resources Foundation in Bolinao and beyond (UP MSI coral cryobank announcement; MERF / ACIAR coral larval restoration project); Silliman University’s Institute of Environmental and Marine Sciences in the Visayas and Mindanao (Silliman University, 10 Dec 2025 — SU-IEMS coral reef restoration research; Silliman University, 29 Jun 2026 — SU-IEMS fish visual census training, Davao Oriental); UP Visayas (UP Visayas CFOS-IMFO, coral reef assessment training in Antique); Mindanao State University at Naawan (MSU at Naawan, Coral Reef Management (CoReM) Hub); Davao Oriental State University in Pujada Bay (DORSU, 23 Jul 2025 — Pujada Bay artificial reef results); the Coastal Conservation and Education Foundation (CCEF, Aug 2024 — 3D-printed clay reef workshop, Maria, Siquijor); and local programs such as the El Nido Foundation in Palawan (El Nido Foundation, Coral Reef Restoration and Education Program). A planned center should complement that work, not overwrite it. A public record of past work is not a partnership agreement, and current BFAR permit numbers were not independently verified for this page.
A possible local livelihood and visitor-education project is a small, locally made line of mineral sunscreens in a reef-tourism town (for example in Palawan, Bohol, Cebu or Batangas), and a tour-boat briefing that asks guests to check ingredients rather than trust a “reef-safe” label. The scientific concern is specific. Downs and colleagues (2016) reported toxicopathological effects of the UV filter oxybenzone (benzophenone-3) on coral planulae and cultured primary cells, and documented environmental contamination in Hawaii and the U.S. Virgin Islands (Downs et al. 2016, oxybenzone effects on coral planulae).
This review did not find a Philippine national law, a Palawan ordinance, or an El Nido or Boracay municipal ordinance that bans oxybenzone or requires “reef-safe” sunscreen. “Reef-safe” is not treated here as a legal term. A pilot would therefore be voluntary: educate boat crews and guests, prefer mineral (zinc oxide or titanium dioxide) formulas, and pair sunscreen with rash guards so less product is needed. It is framed as a possible community product, not as a claim that a product already exists or that a rule requires it.
A second possible livelihood and practice project is a phosphate-free, readily biodegradable dish soap for bangka and tour boats, plus a simple rule of keeping wash-up and greywater off the reef. Nutrients, organic matter and sediment in coastal runoff are well documented stressors of coral reefs: they can reduce coral growth and recruitment and favour algae, bioeroders and disease (Fabricius 2005, terrestrial runoff and coral reefs; Bartley et al. 2014, sediment and watersheds). The Philippine Clean Water Act (RA 9275) sets a national policy to prevent pollution of fresh, brackish and marine waters, including from land-based sources, and applies water-quality standards and civil and penal provisions regardless of the source of pollution (Philippine Clean Water Act of 2004 (RA 9275)). RA 8970 already prohibits the manufacture, importation, distribution and sale of laundry and industrial detergents that contain hard (poorly biodegradable) surfactants (RA 8970, prohibition on hard surfactants in laundry and industrial detergents).
This review did not find a Philippine law or MARINA circular that specifically requires phosphate-free dish soap on island-hopping boats. MARINA Circular SR-2020-02 requires sewage treatment plants and/or holding tanks on Philippine-registered ships in line with MARPOL Annex IV; that rule is about sewage on ships, not greywater from small tour bancas (MARINA Circular SR-2020-02, sewage treatment plants on PH-registered ships). A boat-soap pilot would therefore be a voluntary practice and local product: use a soft-surfactant, phosphate-free soap, wash dishes in a tub, and land greywater for proper disposal rather than over a reef. It is not a claim that current boat rules already mandate this product.
Action Map 2, Water quality: product pilots → · Action Map 9, Community & tourism →
A beginner-to-expert arc: start with why the work matters, then methods and sources, then local application with Filipino partners.
Learn the four runoff stressors Fabricius (2005) separates: dissolved nutrients, particulate organic matter, turbidity and sediment.
Connect watershed processes to reef damage (Bartley et al. 2014) and look at bioindicators (Cooper et al. 2009). Read RA 9275 and RA 8970 as they are written, not as slogans.
With Filipino scientists and the LGU, sketch a local observation and education plan, including the voluntary sunscreen and boat-soap pilots, and be explicit about rules that do and do not exist.
These are other organisations’ resources and public programs. Listing them is not a partnership claim.
Answers are limited to points we can cite from the research library or from official and peer-reviewed sources. Questions we cannot answer that way are left out.
Fabricius (2005) reviews how dissolved inorganic nutrients and particulate organic matter affect coral growth, survival, reproduction and recruitment, and how they interact with algae, bioeroders, pathogens and predators. Fabricius 2005, terrestrial runoff and coral reefs
Sediment and turbidity-related light reduction are two of the four runoff stressors Fabricius (2005) separates. Bartley et al. (2014) review how watershed sources and processes deliver that sediment to reefs, which is why land management is part of reef protection. Fabricius 2005, terrestrial runoff and coral reefs; Bartley et al. 2014, sediment and watersheds
Together, nutrients, organic matter, turbidity and sediment can reduce coral growth and recruitment and shift the balance toward algae and other competitors (Fabricius 2005). Cooper et al. (2009) review bioindicators for tracking those changes. Fabricius 2005, terrestrial runoff and coral reefs; Cooper et al. 2009, water-quality bioindicators
