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Public inventories · EEA, US EPA and HydroWASTE · 41 countries

World map of wastewater treatment plants

Over 57,000 wastewater treatment plants from public inventories on one map. Each point opens a profile with the reported design capacity or population served, the treatment level declared in the source, nearby plants and the regulatory reference of the country. Sizes keep the native unit of each source and are never converted.

Data as reported to each source (EEA Waterbase-UWWTD, US EPA CWNS 2022, HydroWASTE v1.0). This map does not assess compliance or state whether a plant works well: it reads public data and cites the source of every figure.

Map of WWTPs in Europe World map of WWTPs · Map of WWTPs in Spain

Profiles and regulations Español

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Territorios lejanos

Shows published data; does not assess performance. Sizes retain the native unit of each source.

What this map shows

This map brings together over 57,000 wastewater treatment plants from public inventories: the European Environment Agency (Waterbase-UWWTD) for Europe, the US EPA Clean Watersheds Needs Survey for the United States and the HydroWASTE dataset for the rest of the world. Each point opens a profile with the reported design capacity or population served, the treatment level declared in the source, nearby plants, the regulatory reference of the country and a reference energy scenario. Sizes are shown in the native unit of each source and are never converted. The map does not assess compliance and does not state whether a plant works well: it reads public data and cites the source of every figure. Spanish plants link to the profiles of the Spanish observatory.

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