Beaches Yield Tons of Plastic as Runoff Season Peaks

The coastal monitoring stations from Punta Negra to Bahía Profunda reported a sustained surge in plastic accumulation and nutrient-laden silt through the first three weeks of October, as the rainy season pushed runoff into the shallows. The 47-ton tally marks a sharp climb from September's 31 tons and signals what marine scientists describe as a critical inflection point in the dry season's approach.

The Costa Mar Reef Monitoring Network released its preliminary findings on Tuesday, noting that debris composition has shifted notably toward agricultural plastic and mangrove-origin organic matter—a pattern consistent with upstream land-use intensification in the interior valleys. Nutrient concentrations at three stations near Puerto Azul exceeded advisory thresholds for the second consecutive month.

The cleanup effort, coordinated by the Marine Ministry in Puerto Azul, mobilized 340 volunteer hours across twelve beach sites. The data raises fresh questions about the balance between tourism infrastructure expansion and conservation capacity as the region heads into its slower season.