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Microplastics and plastic additives in rainwater and rainwater harvesting systems in the Greater Jakarta Coastal Region, Indonesia
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Scientists testing rainwater collection systems in coastal Jakarta found tiny plastic particles and plastic-related chemicals in the stored water, though not in the rainwater itself before collection. This is early, small-scale research, but it suggests the tanks or pipes used to catch and store rainwater might be adding plastic contamination, something worth watching if you rely on harvested rainwater for drinking or cooking.
Microplastics and plastic additives in rainwater harvesting systems (RWHS) represent a potential emerging concern in coastal urban environments. This preliminary baseline study investigated microplastic polymers and selected plastic additives in rainwater and RWHS water from two coastal sites in the Greater Jakarta coastal region, Indonesia, using pyrolysis gas chromatography-tandem mass spectrometry (Py-GC/MS/MS) for microplastic polymers and ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) for plastic additives. In RWHS samples, PVC, PET, and PMMA were detected, with differences in polymer composition and concentration between the two sampling locations. Plastic additives were also detected in rainwater and RWHS samples after blank correction, while no target microplastic polymers were detected above the method detection/quantification limits in the analyzed rainwater sample. The observed site-specific differences suggest that contamination patterns may vary between RWHS locations and may be influenced by local environmental conditions, atmospheric deposition, and possible interactions with RWHS infrastructure. Given the limited sampling design, potential blank-related uncertainty for some additives, and absence of direct source attribution, the findings should be interpreted as preliminary baseline evidence. Future studies should include expanded sampling, improved quality control, and direct characterization of RWHS materials.
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This review pulls together existing research showing that Jakarta's rainwater has the highest microplastic contamination levels recorded in Indonesia, meaning even rain isn't a clean, safe source of water anymore. These tiny plastic particles falling from the sky can settle into soil, waterways, and even our lungs, potentially contributing to breathing problems and other health risks over time. The findings are a wake-up call for stronger plastic regulations and better waste management, especially in crowded cities where air pollution and plastic use are high.
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The occurrence of microplastics in the surface water of several urban lakes in the Megacity of Jakarta
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Six urban lakes in the Jakarta metropolitan area were all found to contain microplastics in their surface water, with the most downstream lakes closest to Jakarta Bay showing the heaviest contamination. The study highlights how plastic waste flowing through populated urban watersheds accumulates in lakes before eventually reaching the ocean. Dense urban areas with poor waste management are key hotspots for freshwater microplastic pollution.
Microplastics in harvested rainwater: Occurrence, characterization, and human health risk in a climate-vulnerable, water-scarce southwest coastal region of Bangladesh
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Rainwater collected for drinking in coastal Bangladesh, often the only option as rising seas contaminate groundwater, contains tiny plastic particles from roofs and storage tanks, especially iron roofs with plastic tanks. Current levels aren't an immediate health emergency, but children face higher exposure risk, highlighting the need for better harvesting systems and filtration as communities rely more on this water source.
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Researchers found microplastics in both surface water and sediments across 12 coastal sampling sites in Jakarta Bay, Indonesia, documenting their abundance, distribution patterns, and morphological characteristics in a heavily urbanized tropical coastal environment.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.