Tallinna Vesi AS is an Estonia-based water utility company that specializes in the management, treatment, and distribution of drinking water, as well as the collection, treatment, and disposal of wastewater and stormwater. Founded in 1991 and headquartered in Tallinn, Estonia, the company operates across regulated utility services and non-regulated infrastructure sectors. Its core product and service portfolio includes the extraction, purification, and supply of potable water sourced from Lake Ülemiste and regional groundwater aquifers; the collection, transport, and biological-chemical purification of municipal and industrial wastewater; the management, drainage, and treatment of urban stormwater; comprehensive laboratory testing services, including chemical and microbiological analyses of drinking water, wastewater, and soil; infrastructure construction, trenchless pipeline rehabilitation, and engineering design through its wholly owned subsidiary Watercom OÜ; and technical consultation, pressure testing, CCTV pipeline inspections, and specialized machinery rental for utility networks. The company provides its services to residential, commercial, industrial, and public sector clients primarily within the City of Tallinn and adjacent municipalities across Harju County, including Saue, Harku, and Maardu. In recent operational and strategic developments, Tallinna Vesi AS has advanced its comprehensive capital investment program to upgrade critical infrastructure and strengthen environmental sustainability, featuring major modernizations at the Ülemiste Water Treatment Plant and the Paljassaare Wastewater Treatment Plant to enhance energy efficiency, nutrient removal, and biogas-to-energy cogeneration; executed a territory-wide rollout of automated smart water meters to optimize real-time consumption tracking and leak detection; transitioned all production and treatment facilities to 100% renewable electricity; and expanded service concession and pipeline construction agreements with neighboring local governments.