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UK statutory guidance for water and sewerage companies under section 94 of the Water Industry Act 1991. DWMPs are 25-year strategic plans produced on a 5-year cycle, structured around Strategic and Tactical Planning Units (sub-catchment and wastewater treatment works level). They require climate projections, CSO frequency analysis, WFD linkage and adaptive planning under uncertainty — making them the nearest real-world equivalent to an IUWMP.
DEFRA; ENVIRONMENT AGENCY; OFWAT; WELSH GOVERNMENT & NATURAL RESOURCES WALES (2025): Guidelines for Statutory Drainage and Wastewater Management Plans (DWMPs). London: gov.uk-Environment-Water Management. URL [Accessed: 30.04.2026]Directive (EU) 2024/3019 on the Treatment of Urban Wastewater modernizes the European Union’s framework for urban wastewater management as part of the EU Green Deal and Zero Pollution Action Plan. It introduces stricter requirements for wastewater collection and treatment, including the removal of nutrients, micropollutants, and emerging contaminants, while also promoting energy efficiency, water reuse, and circular economy approaches. The directive strengthens monitoring obligations, addresses stormwater overflows and public health surveillance, and applies the “polluter pays” principle to help finance advanced treatment technologies.
EUROPEAN PARLIAMENT & COUNCIL OF THE EU (2024): https://eur-lex.europa.eu/eli/dir/2024/3019/oj [Accessed: 27.04.2026]Directive 2024/3019 is the core EU legislative framework governing the collection, treatment, and discharge of urban wastewater, recasting and significantly updating the original 1991 directive. Key additions include requirements addressing micropollutants, energy performance of treatment infrastructure, and extended producer responsibility for pharmaceutical and cosmetic industries. This directive forms the primary regulatory context that the WATERUN project aims to respond to, by equipping municipalities and water utilities with practical planning tools for compliance.
EUROPEAN PARLIAMENT & COUNCIL OF THE EU (2024): Directive (EU) 2024/3019 on the Treatment of Urban Wastewater (Recast). Including Annex V. In: Official Journal of the European Union, L, 27 November 2024. Brussels: European Union. URL [Accessed: 27.04.2026] PDFPractitioner-level US state guidance that directly complements the EPA framework. Specifies how to scope CSO facility plans, define monitoring plans (measurement points, minimum durations, sampling protocols), assess system condition and structure a CSO Master Plan. Useful reference for the operational detail behind Map runoff in your city and the rainfall-monitoring recommendations in Stage 1.
ME DEP (1994): Program Guidance on Combined Sewer Overflow (CSO) Facility Plans (DEPLW0846). Augusta, ME DEP: Maine Department of Environmental Protection. URL [Accessed: 22.04.2026] PDFDirective 2000/60/EC, also known as the Water Framework Directive, establishes the main legal framework for protecting and managing water resources across the European Union. It aims to prevent the deterioration of rivers, lakes, groundwater, and coastal waters while achieving “good” ecological and chemical status through sustainable water management. The directive requires EU Member States to manage water based on river basin districts, implement monitoring systems, and develop coordinated river basin management plans with public participation.
EUROPEAN PARLIAMENT & COUNCIL OF THE EU (2000): https://eur-lex.europa.eu/eli/dir/2000/60/oj [Accessed: 21.04.2026]