Water tenders — page 4
1,313 listings tracked right now · page 4 of 28
Grants and contracts for water supply, treatment, reuse and resilience. The active funders are the World Bank and regional development banks, EU LIFE and Horizon, the US EPA, and water utilities procuring through the public-tender feeds. Listed below are the open water tenders and contract notices that landscape produces, taken from each buyer's own notice and re-checked on every refresh.
Procurement is dominated by water utilities, port authorities, municipalities and the development banks financing them. Contracts are typically works or long-term services rather than research, and prequalification on prior comparable projects is common. Development-bank-financed notices follow the bank's own procurement rules, which are generally more open to non-domestic bidders than a purely national tender would be.
This page lists open water tenders and public contracts currently tracked by Raise Lens — 1,313 of them right now, sorted with the soonest deadline first. Every listing has been classified against the sustainability taxonomy rather than matched on keywords, so what appears here is water work rather than anything whose description happens to mention it.
The buyers publishing water tenders and public contracts here include Instytut Rybactwa Śródlądowego im. Stanisława Sakowicza – Państwowy Instytut Badawczy, CVC, Aquanet S.A., among 2 others. Who is funding matters as much as what: eligibility, reporting burden and the realistic timeline to a decision vary far more between buyers than between individual calls.
Geographic coverage on this page spans LATAM, SUBSAHARAN-AFRICA. Eligibility is usually tied to where the work happens or where the applying organisation is registered, and the two are not always the same — worth checking before investing time in an application.
Monitoring fishing surveys of lake ichthyofauna in Poland 2026
••••• organisation· PL
This tender procures monitoring fishing surveys (ichthyofauna sampling) across 15 Polish lakes in 2026, following EU Water Framework Directive protocols. Bidders must be specialized in freshwater ecological monitoring, fish sampling methodology, and biota collection under strict EU environmental standards.
Formulate wastewater treatment alternative for indigenous community
••••• organisation· CO
This tender seeks to formulate a wastewater treatment solution for an indigenous community in Colombia's Valle del Cauca region. Bidders should have expertise in water treatment design, environmental engineering, and community-based infrastructure planning.
Sewer survey and sewage treatment consultancy – sludge dewatering station concept
••••• organisation· PL
This tender procures multi-variant design consultancy for upgrading a municipal wastewater treatment plant's sludge handling node in Poznań, Poland, focusing on biogas production, sludge dewatering, nutrient recovery, and system reliability. Bidders should be engineering consultancies or environmental design firms with expertise in wastewater treatment plant modernization and sludge management.
Treatment and disposal of foul liquids – municipal waste landfill leachate service
••••• organisation· ES
This tender procures treatment and disposal services for leachate from a municipal waste landfill in Catalonia, Spain. Bidders should be specialized waste-water treatment operators with experience in landfill leachate management and environmental compliance.
Engineering design services – two retention structures on Lubiń B stream
••••• organisation· PL
This tender procures engineering design documentation and administrative approvals for construction of two water-retention structures on the Lubiń B stream in Poland, part of a climate-adaptation forestry project. Bidders should be engineering design firms with expertise in hydrological infrastructure, environmental permitting, and forest-water management.
Phytoplankton analysis Bavarian flowing waters 2027/2028 diatom preparation
••••• organisation· DE
Procurement of phytoplankton analysis and diatom sample preparation services for Bavarian flowing waters in 2027/2028, targeting specialized environmental laboratories or ecological consultancies with aquatic biomonitoring expertise.
Architectural services for group water supply pipeline project documentation
••••• organisation· CZ
Procurement of architectural and engineering services to develop project documentation and obtain building permits for a regional water supply pipeline serving municipalities in the Dobříšska and Novoknínska area. Bidders must be qualified design/engineering firms with experience in water infrastructure and permitting processes.
Engineering design services – Structural planning and engineering for water infrastructure
••••• organisation· DE
Engineering design services for the structural planning and internal sealing retrofit of a dike managed by a German water authority. Bidders should be engineering firms with expertise in hydraulic infrastructure, geotechnical design, and dike rehabilitation.
Project-related planning services for new Breitmoos water works construction
••••• Municipality· DE
This tender procures engineering and planning services for the design and construction of a new water treatment facility (Wasserwerks Breitmoos) in Germany. Bidders should be planning/engineering firms with water infrastructure and municipal utility project experience.
Planning services for weirs, ditch widenings, active irrigation HOAI 2021 LP 5–8
••••• organisation· DE
Planning services (HOAI LP 5–8) for wetland habitat restoration infrastructure including nine adjustable weirs, twelve ditch widenings, and three solar-powered groundwater pumps in a German nature reserve. Bidders must be engineering/planning firms with HOAI expertise and wetland/biodiversity project experience.
Solar photovoltaic system supply, installation, commissioning and legalization for water utility resilience
••••• organisation· CO
This tender procures design, supply, installation, commissioning and legalization of a solar photovoltaic system for a municipal water utility in Colombia to enhance energy resilience and water security. Bidders should have expertise in solar PV system integration, installation, grid connection, and experience with utility-scale renewable energy projects in Latin America.
Innovative Solids Separation Technologies for Wastewater Treatment
••••• organisation· GB
United Utilities seeks innovative solids separation technologies (centrifugal, cyclonic, vortex-based) for wastewater treatment without conventional filtration media. Bidders should offer advanced separation equipment or systems applicable to municipal/industrial wastewater streams.
Living Logic: Nature-Based Wastewater Treatment and Intelligent Monitoring
••••• organisation· GB
United Utilities seeks partners to develop nature-based wastewater treatment systems with intelligent monitoring capabilities for the Living Logic Water Innovation Fund bid. Ideal bidders are technology providers, research organisations, and suppliers offering ecological treatment solutions, diagnostics, or decision-support tools.
Sewage treatment consultancy services – nitrogen removal requirements upgrade
••••• organisation· DK
Consultancy services for sewage treatment plant upgrade to meet stricter nitrogen removal requirements by end-2027, including design, engineering, permitting, and commissioning of new clarification tank, return pump station, and carbon dosing system. Bidder should be an engineering consultancy with wastewater treatment expertise and Danish regulatory knowledge.
Aktivkohlereaktivierung 2027
••••• organisation· DE
Reactivation of coconut-shell-based activated carbon for drinking water production, including loss replacement in 2027. Bidders should be specialized suppliers of activated carbon reactivation services or water treatment chemical providers.
Professional Services and Management Support for Environmental Department
••••• organisation· CO
This tender procures professional services to support Colombia's environmental department in implementing a payments-for-ecosystem-services scheme focused on conservation of strategic watersheds and ecosystems. Bidders should have expertise in environmental management, watershed conservation, payment scheme design, and project coordination in Latin America.
Technical Assistance for Cravo Sur River Watershed Monitoring and Biodiversity Conservation
••••• Municipality· CO
Municipality of Yopal seeks technical assistance for monitoring and consolidating environmental data on the Cravo Sur River watershed plan, reviewing environmental components of investment projects, and structuring a biodiversity conservation initiative. Bidders should have expertise in environmental monitoring, watershed management, ecosystem services assessment, and project environmental review.
Technical assistance for project management and works supervision – Romanian water infrastructure
••••• organisation· RO
This tender procures technical assistance for project management and construction supervision of a regional water and wastewater infrastructure development project in Vaslui County, Romania, funded under the 2014–2020 EU programming period. Bidders should be engineering consultancies or technical service providers with expertise in water systems management, GIS modelling, hydraulic analysis, and construction supervision.
Hydrometry technical services for water body quantitative assessment and ecological flow regimes
••••• organisation· ES
Technical hydrometry services to improve quantitative knowledge and assessment of water body status and ecological flow regimes in the Ebro river basin. Bidders should have expertise in hydrological monitoring, water resource assessment, and ecological flow evaluation.
Environmental expert supervision services for hydroengineering embankment repair
••••• organisation· PL
This tender procures environmental expert supervision services for a hydroengineering embankment repair project in Poland, requiring on-site ecological monitoring and compliance oversight. Bidders must be qualified environmental consultants with expertise in nature conservation and construction-site ecological management.
Contract technical, administrative, legal and financial supervision of sanitary sewerage and wastewater treatment implementation
••••• organisation· CO
This tender contracts technical, administrative, legal, and financial supervision of a wastewater collection and treatment infrastructure project serving a rural municipality in Colombia. Bidders should be engineering firms or consortia with experience in water infrastructure oversight and project management in Latin America.
Support services for rural water supply and sanitation infrastructure management
••••• Municipality· CO
This tender procures management support services to strengthen rural water supply (acueducto) and implement wastewater treatment and basic sanitation solutions across rural Paz de Ariporo municipality, Colombia. Bidders should have expertise in rural water infrastructure, sanitation systems, and project management in resource-constrained settings.
Professional services to support environmental management department activities
••••• organisation· CO
This tender procures professional services to support environmental management activities in Cali, Colombia, specifically strengthening payment-for-ecosystem-services schemes for conservation of strategic watersheds. Bidders should have expertise in environmental policy, watershed management, conservation finance, and ecosystem service valuation.
Specialized Professional Services for Environmental Management
••••• organisation· CO
This tender procures specialized professional services to support environmental management activities in Cali, Colombia, specifically agroecological advisory to smallholder farmers within a payments-for-ecosystem-services programme for watershed conservation. Bidders should have expertise in agroecology, environmental advisory, and community-based conservation.
Sludge collection, transport and treatment services from wastewater treatment plants
••••• organisation· PT
Procurement of sludge collection, transport, and treatment services from wastewater treatment plants (ETAR) by a Portuguese water utility. Bidders should have expertise in sludge management, transport logistics, and treatment technologies (composting, incineration, or land application).
Planning services for rainwater utilization at school campus
••••• Municipality· DE
Planning and consulting services for rainwater harvesting and management at a school campus, targeting stormwater decoupling, evaporation increase, natural watercourse restoration, and flood/heat-risk reduction. Bidders should have expertise in sustainable water management, landscape design, and climate-adaptation infrastructure.
New Construction Endinger Graben, Sections 1–4: Ecological Planning
••••• Municipality· DE
This tender procures ecological specialist planning (Fachplanung Ökologie) for the expansion and new construction of the Endinger Graben watercourse in four sections. Bidders should be ecological consultancies or environmental engineering firms with expertise in habitat assessment, water-course restoration, and biodiversity impact mitigation.
Professional Services for Forest Legislation Compliance and Reforestation
••••• Municipality· CO
This tender procures professional services for environmental compliance monitoring, reforestation, and watershed protection under Colombia's municipal development plan. Bidders should be environmental consultants or forestry specialists with experience in regulatory compliance and ecosystem restoration.
Professional Services for Water Resource Conservation and Sustainable Management Project
••••• organisation· CO
This tender procures professional services to support the execution of a water resource conservation, restoration, and sustainable management project across strategic areas in Cauca Department, Colombia. Bidders should have expertise in watershed management, environmental conservation, project coordination, and sustainable resource governance.
Professional Services for Water Resource Conservation and Sustainable Management Project
••••• organisation· CO
This tender procures professional services to support the execution of a water resource conservation, restoration, and sustainable management project in Cauca Department, Colombia. Bidders should have expertise in watershed management, environmental conservation, and project implementation in biodiversity-rich regions.
Professional Services for Flood Protection Sustainability Strategy in Colombia
••••• organisation· CO
This tender procures professional services to develop a sustainability and governance strategy for flood protection infrastructure in Santiago de Cali, Colombia. Bidders should have expertise in climate adaptation, flood-risk management, infrastructure resilience, and stakeholder engagement in urban water systems.
Support for Environmental Management – Water Treatment Plant Operations
••••• Municipality· CO
This tender procures technical support services for potable and wastewater treatment plant operations, including monitoring, maintenance, and environmental sustainability management in compliance with applicable regulations. Bidders should be environmental engineering firms or water utilities with expertise in treatment system optimization and environmental compliance.
Professional Services for Environmental Support in Conservation and Sustainable Management Project
••••• organisation· CO
This tender procures professional environmental consulting services to support conservation, restoration, and sustainable management of strategic water-resource areas in Cauca Department, Colombia. Bidders should have expertise in environmental assessment, watershed management, and conservation project implementation.
RR Worringen
••••• Municipality· DE
This tender procures ecological, soil science, and tree-specialist construction supervision for the RR Worringen project in Cologne, following AHO standard guidelines. Bidders must be environmental consultants or engineering firms with expertise in ecological monitoring, soil assessment, and arboricultural oversight during construction.
Engineering design services – Schöpfwerk Niendorf replacement construction
••••• organisation· DE
Engineering design services for replacement construction of a pumping station (Schöpfwerk Niendorf) in Germany, incorporating flood protection, energy efficiency, fish-friendly technology, and circular-economy principles. Bidders must be engineering design firms with expertise in hydraulic infrastructure, environmental planning, sustainability assessment, and compliance with EU Water Framework Directive and German climate law.
Unsealing and shading of school courtyard at Bettina von Arnim Gymnasium
••••• Municipality· DE
Procurement of landscape architecture planning services (phases 4–8 per HOAI) for climate-adapted redesign of a school courtyard, including de-sealing, greening, shading, rainwater management, and accessible outdoor spaces. Suitable bidders are specialized landscape architecture or open-space planning firms with experience in climate-adaptive school grounds and sustainable drainage design.
Strategic Alliance Contract for Water Meter Technological Renewal
••••• organisation· CO
Strategic alliance to replace water meters with modern technology to reduce water losses in Yopal's water utility service area. Bidder must supply, install, finance, and maintain smart metering equipment with commercial and technical support.
Wastewater discharge survey, characterization, treatment systems and retributive-rate calculation
••••• Municipality· CO
This tender procures a comprehensive wastewater characterization and treatment-system study for Cartago municipality, including discharge-point surveys, receptor-body assessment, and retributive-rate calculation. Bidders should have expertise in environmental engineering, wastewater hydrology, water-quality analysis, and regulatory compliance in Colombian municipal contexts.
Research services for Black Sea integrated marine ecosystem monitoring programme
••••• organisation· RO
This tender procures research services to develop an integrated monitoring programme for the Black Sea marine ecosystem under EU Marine Strategy Framework Directive requirements, delivering two annual reports on ecosystem status based on physicochemical and biological monitoring data. Bidders should be research institutions, environmental consultancies, or marine science specialists with expertise in marine monitoring, EU environmental directives, and ecosystem assessment.
Refuse waste services – leachate pumping transport treatment non-hazardous landfill
••••• organisation· FR
This tender procures pumping, transport, and treatment services for leachate from a non-hazardous waste landfill in France, with volumes up to 16,000 m³/year. Bidders must be waste-management or environmental-services firms capable of leachate handling and coordination with wastewater treatment plants.
Detailed technical and environmental-social studies for Lueta hydroelectric plant, Phase 1
••••• Bank· CD
Procurement of detailed technical and environmental-social studies for a hydroelectric power plant on the Lueta River in Democratic Republic of Congo, Phase 1. Bidders should have expertise in hydropower feasibility assessment, environmental impact studies, and social safeguards in sub-Saharan Africa.
Professional Services for Integral Wetlands Management, Huila Department
••••• organisation· CO
Professional services to support environmental management of wetlands in Huila Department, Colombia, including development and implementation of environmental management plans and conservation actions. Bidders should have expertise in wetland ecology, environmental planning, and sustainable resource management.
Professional Services for Water Sustainability Territory Project Activities
••••• organisation· CO
This tender procures professional services to implement water sustainability and hydrological management activities for a territorial project in Colombia. Bidders should have expertise in water resource management, environmental consulting, and sustainable water governance.
Professional Services for Water Sustainability Project Activities
••••• organisation· CO
This tender procures professional services to implement water sustainability and hydrological management activities for a territorial project in Colombia. Bidders should have expertise in water resource management, environmental consulting, and sustainable water governance.
Professional Services for Water Ordering, Conservation and Adaptive Management Project
••••• organisation· CO
This tender procures professional services for a water-management and ecosystem-conservation project in the Zapayán wetland (Ciénaga Zapayán), Magdalena Department, Colombia, focusing on adaptive management and watershed ordering. Bidders should have expertise in wetland ecology, water governance, climate adaptation, and community-engaged conservation implementation.
Weed-killing services – invasive grass removal Loiret river (2 lots)
••••• organisation· FR
Framework agreement for invasive aquatic weed control and removal services on the Loiret river over 2 lots, maximum €50,000 HT annually. Bidders should have expertise in riverine vegetation management, ecological restoration, and invasive species control.
Engineering design services for the construction of civil engineering works – RAW_700-34_Trinkwasser, Schmutzwasser & Niederschlagswassser
••••• organisation· DE
This tender procures engineering design services for water infrastructure (drinking water, wastewater, and stormwater systems) in an industrial development zone in Germany, following HOAI 2021 standards. Bidders should be licensed engineering design firms with expertise in civil water infrastructure planning and German regulatory compliance.
Environmental services – oxygen supply to lake and online monitoring
••••• organisation· DK
This tender procures oxygen delivery, online monitoring, and operation/maintenance of a tank facility system for Lake Furesø aeration to bind phosphorus and improve water quality. Bidders should have expertise in water treatment, aeration systems, SCADA/monitoring, and environmental engineering.