Yes, rainwater collection is legal in Turkey, but compliance hinges on adherence to the Water Law (Law No. 2560) and local municipal bylaws. The General Directorate of State Hydraulic Works (DSİ) monitors large-scale systems, while municipalities regulate small-scale household setups under the 2023 amendments to the Water Pollution Control Regulation. Violations may trigger fines or mandatory disconnection under the 2026 enforcement framework.
Key Regulations for Rainwater Collection in Turkey
- Water Law (Law No. 2560): Requires permits for systems exceeding 10 m³ storage capacity, with DSİ approval mandatory for agricultural or industrial use. Domestic systems under 10 m³ fall under municipal jurisdiction.
- Water Pollution Control Regulation (2023): Mandates that collected rainwater must not mix with potable water networks. Non-compliant systems face penalties under Article 28, enforced by local environmental boards.
- Municipal Bylaws: Cities like Istanbul and Ankara impose additional restrictions, such as mandatory filtration systems for roof runoff and inspections by the Metropolitan Municipality Water and Sewerage Administration (İSKİ/ASKİ).
Local authorities may impose further conditions, including storage tank labeling and periodic water quality testing. Non-residential users must submit a technical feasibility report to DSİ for approval. Failure to comply risks administrative sanctions under the 2026 enforcement protocol.