Yes, rainwater collection is legal in Chile, but subject to strict oversight under the Water Code and regional water authority regulations. Private use is permitted for non-potable purposes, yet municipal permits may apply in water-scarce zones like the Coquimbo and Valparaíso regions. The 2026 amendments to the Water Code introduce stricter monitoring for large-scale systems to prevent unauthorized extraction.
Key Regulations for Rainwater Collection in Chile
- Water Code (Código de Aguas) compliance: Collection must not interfere with surface or groundwater rights, per Articles 5 and 6. Unauthorized diversion of natural flows is prohibited, even if sourced from rooftops.
- Regional Water Authority (Dirección General de Aguas, DGA) permits: Systems exceeding 10 m³ storage or serving commercial/industrial purposes require prior authorization. The DGA enforces this under Decree 70 (2022) for arid regions.
- Local municipal ordinances: Some communes (e.g., La Serena, Antofagasta) mandate permits for residential systems to align with urban water management plans. Non-compliance risks fines up to 50 UTM (≈$3,800 USD as of 2024).
Critical Considerations:
- Potable use restrictions: Rainwater cannot replace municipal supply without DGA certification for treatment systems.
- Environmental impact: Large-scale collection in protected basins (e.g., Atacama Desert) may trigger environmental assessments under Law 21.202.
- 2026 compliance shifts: The pending Water Code reform tightens reporting for systems over 5 m³, requiring digital registration with the DGA’s Sistema de Información de Recursos Hídricos.