The Philippines has signed a landmark agreement with South Korea to advance air quality monitoring, while a global non-profit is preparing to deploy river trash interceptors in Manila — two developments that signal a shift toward more structured, data-driven pollution control in the country. These initiatives, though separate, share a common thread: they aim to measure pollution more precisely and target interventions where they will have the greatest effect. For residents of Metro Manila and other urban centres, this could mean clearer information about the air they breathe and visible reductions in the plastic waste that clogs the city’s waterways.
The numbers above only hint at the scale of what is being attempted. The air quality monitors, for instance, are not just hardware — they are part of a broader two-year project called the Clean Air for Sustainable ASEAN (CASA) Cooperation project, funded by the ASEAN-Korea Cooperation Fund and launched in 2023. The goal is to give ASEAN member states the tools and expertise to build robust air quality management systems, including advanced equipment, better data integration, and training for local specialists. Meanwhile, The Ocean Cleanup’s 30 Cities Program, which includes Manila, aims to eliminate up to one-third of all plastic flowing from rivers into the ocean before the end of the decade. These are ambitious targets, and the next sections will break down what each initiative actually involves, how they work, and what they mean for Filipinos.
What the CASA and Ocean Cleanup partnerships actually deliver
These are not abstract agreements. The CASA project, signed by DENR Assistant Secretary and Environmental Management Bureau Director Jacqueline Caancan and Seoul National University Professor Kiyoung Lee at the Korean Embassy in Taguig City, runs until 2026. The two monitoring units will be installed at the Pasay City air quality monitoring station and at the DENR central office in Quezon City. They are designed to capture real-time data that can be linked to existing national and regional platforms, which means the information could eventually be accessible to the public and policymakers alike.
The Ocean Cleanup’s involvement is more recent but equally concrete. The organisation has already surveyed nearly 100 sites in the Philippines and is working with the DENR to identify key deployment locations. Its first Interceptor barrier will be deployed in the Meycauayan River in Bulacan, with additional strategic sites along the Pasig River being identified by the Pasig River Coordinating and Management Office. The five-year agreement signed by the DENR is designed to complement the government’s upstream regulatory push under Republic Act 11898, the Extended Producer Responsibility Act, which requires large companies to recover and recycle the plastic packaging they produce.
Why these partnerships matter for Metro Manila and beyond
Air pollution and plastic waste are not new problems in the Philippines, but the approach to solving them has often been fragmented. The CASA project and The Ocean Cleanup’s 30 Cities Program represent a different model: international cooperation paired with technology that produces measurable results. The CASA project aims to identify the sources and health impacts of air pollution, strengthen monitoring systems, and develop effective policy responses. That is a significant step beyond simply measuring pollution levels — it is about understanding where the pollution comes from and what it does to people.
The Ocean Cleanup’s work in Manila is being supported by Energies PH, and the initiative is a direct response to the urgent directives of President Ferdinand Marcos Jr., serving as a technical pillar for the administration’s flagship ‘Pasig Bigyang Buhay Muli’ (PBBM) project. The scale of the problem is enormous. According to the World Bank, the Philippines is reportedly among the top contributors of ocean plastic waste, with an estimated more than 0.3 million metric tons of mismanaged plastic entering the ocean every year. Over 90% of collected waste from the area is reportedly composed of hard and film plastics, according to a study done by EcoWaste Coalition, KOICA, DENR, and De La Salle University-Dasmarinas.
What often gets missed in discussions about pollution control is the distinction between measuring a problem and solving it. The CASA project is primarily about measurement and capacity-building. It gives the Philippines better data on air quality, which is a prerequisite for effective policy. But better data alone does not clean the air. The Ocean Cleanup’s Interceptors, on the other hand, are a direct intervention — they physically remove plastic from rivers. However, they are not a substitute for reducing plastic production and improving waste management upstream. The partnership is designed to complement the Extended Producer Responsibility Act, which forces large companies to take responsibility for the plastic they put into the market. Without that regulatory backbone, the Interceptors would be fighting a losing battle against a constant inflow of new waste.
What often gets overlooked about these initiatives
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| Initiative | Primary Focus | Timeframe | Key Limitation |
|---|---|---|---|
| CASA Project | Air quality monitoring & capacity-building | Two years (until 2026) | Does not directly reduce emissions; depends on policy follow-through |
| Ocean Cleanup 30 Cities | River plastic interception | Ongoing; Manila deployment planned for 2026 | Treats symptoms, not causes; requires upstream regulation to sustain gains |
| DENR-Ocean Cleanup Pasig Agreement | Floating waste removal & data exchange | Five years | Limited to Pasig River system; does not address land-based waste sources |
The table above highlights a crucial distinction: these initiatives are complementary, not comprehensive. The CASA project, for instance, is a two-year initiative that ends in 2026. What happens after that depends on whether the Philippines has built enough local expertise to sustain the monitoring systems independently. The Ocean Cleanup’s 30 Cities Program, meanwhile, is planned to start in Manila in 2026, but the organisation has already collected over 46 million kilograms of trash globally as of December 2025 — a figure that grew to over 52 million kilograms by April 2026. That track record suggests the technology works, but the question is whether local governments can maintain the interceptors and properly dispose of the collected waste.
The data gap in air quality monitoring
One of the less discussed aspects of the CASA project is what it reveals about the current state of air quality monitoring in the Philippines. The two new units measure fine particulate matter and ground-level ozone — two pollutants with well-documented health effects. But the Philippines has long struggled with air quality data that is either incomplete or not easily accessible to the public. The CASA project’s emphasis on data integration and real-time monitoring could change that, but only if the data is actually shared with researchers, journalists, and the public. Without transparency, even the best monitoring equipment is just hardware sitting in a room.
The plastic waste composition problem
The finding that over 90% of collected waste from the Manila Bay area is hard and film plastics is significant because it tells waste managers exactly what they are dealing with. Hard plastics can often be recycled, but film plastics — like sachets and plastic bags — are much harder to process economically. This is where the Extended Producer Responsibility Act comes in. If large companies are required to recover and recycle the plastic packaging they produce, they have an incentive to design packaging that is actually recyclable. The Ocean Cleanup’s Interceptors can capture the waste, but without a system to recycle it, the collected plastic still ends up in landfills or incinerators.
What you can do and what to watch for next
These large-scale initiatives may feel distant from daily life, but they create concrete opportunities for individuals, communities, and local governments to take action. The following subsections outline practical steps and emerging developments worth tracking.
How to access and use air quality data
Once the CASA project’s monitoring units are operational in Pasay City and Quezon City, the real-time data they generate should be accessible through national and regional air quality monitoring platforms. If you live in Metro Manila, you can check whether your local government unit publishes this data online or through mobile applications. The DENR’s Environmental Management Bureau is the primary agency responsible for disseminating this information. If the data is not publicly available, you can file a request under the Freedom of Information program. Knowing the air quality index in your area allows you to make informed decisions — for example, limiting outdoor activity on days when particulate matter levels are high, or wearing an N95 mask during peak pollution hours.
Supporting river clean-up efforts responsibly
The Ocean Cleanup’s Interceptors are designed to capture plastic before it reaches the ocean, but the organisation also relies on local partners for proper disposal and recycling. If you live near the Pasig River or Meycauayan River, you can support these efforts by ensuring your own waste does not enter waterways. This means securing trash bins, avoiding littering near drainage canals, and participating in community clean-up drives organised by local government units or environmental groups. The collected waste from the Interceptors will be transported to shore for proper disposal, but the system works best when less waste enters the river in the first place.
Understanding the Extended Producer Responsibility Act
Republic Act 11898 requires large companies to recover and recycle the plastic packaging they produce. This means that as a consumer, you may start seeing changes in how products are packaged — fewer sachets, more recyclable materials, or deposit-return schemes for bottles. You can support this by choosing products from companies that comply with the law and by properly segregating your waste so that recyclable plastics can actually be processed. The law is designed to shift the cost of waste management from local governments and taxpayers to the companies that produce the packaging in the first place.
Emerging developments to watch
The Ocean Cleanup has already surveyed nearly 100 sites in the Philippines and is using AI-powered Smart River Surveys — remote-sensing cameras, GPS trackers, and drone mapping — to model plastic flows and identify the most effective deployment points. This data-driven approach means that future Interceptor locations will be chosen based on where they can have the greatest impact. If you live in a city with a river that feeds into Manila Bay, it is worth watching whether your area is identified as a priority site. The organisation’s 30 Cities Program is planned to start in 2026, so deployment timelines may shift depending on local approvals and logistical preparations.
Frequently asked questions
Will the air quality data from the CASA project be available to the public? â–ľ
How does The Ocean Cleanup decide where to deploy Interceptors? â–ľ
What happens to the plastic collected by the Interceptors? â–ľ
Is the CASA project only for the Philippines? â–ľ
How does the Extended Producer Responsibility Act relate to these initiatives? â–ľ
These partnerships represent a meaningful step toward cleaner air and waterways in the Philippines, but they are not silver bullets. The CASA project gives the country better tools to measure air pollution, but reducing emissions will require policy changes and industrial compliance. The Ocean Cleanup’s Interceptors can remove plastic from rivers, but without upstream regulation and better waste management, the plastic will keep coming. What these initiatives do provide is a clearer picture of the problem and a proven method for tackling parts of it. The next few years will show whether the Philippines can sustain the momentum. If this was useful, you might also want to read a deeper look at Metro Manila’s air quality challenges.
Sources
Philippines drowning in plastic trash — A broader overview of the country’s plastic waste problem and its global impact.
Philippine water crisis and pollution impact — How water pollution affects communities and what is being done about it.
DENR, South Korea partner for air quality monitoring project. Philippine News Agency, 2025.
The Ocean Cleanup to deploy Interceptors in Manila. The Ocean Cleanup, 2025.
DENR, The Ocean Cleanup forge strategic alliance to purge plastic waste from Pasig River. Manila Bulletin, 2026.
