Chunapampa N3 Wastewater Treatment Plant, Huánuco, Peru

Chunapampa N3 is a municipal wastewater treatment plant located near the airport in Huánuco, Peru, in the Huánuco region. It serves a small population of 210 residents, reflecting its role in a rural or peri-urban setting. The plant provides secondary treatment, which is the standard biological process for reducing organic matter and suspended solids. Under Peruvian regulations, small-scale plants like this are typically required to meet national effluent standards set by the Ministry of Housing, Construction and Sanitation (MVCS). The plant discharges 17.28 m³/day of treated wastewater. The treated effluent from Chunapampa N3 flows into local streams that eventually drain into the Huallaga River, a major tributary of the Marañón River, which is part of the Amazon River basin. This downstream connection highlights the plant's role in protecting water quality in the upper Amazon watershed, supporting aquatic ecosystems and downstream communities.

The plant's discharge enters local watercourses that feed into the Huallaga River, a key tributary of the Marañón River, which ultimately flows into the Amazon River. This region is ecologically sensitive, supporting diverse freshwater species and providing water for agriculture and human use. Proper secondary treatment helps reduce organic pollution and protects downstream habitats from eutrophication and pathogen contamination.