SYMSAGEL

What SYMSAGEL does

SYMSAGEL (Syndicat Mixte pour le Schéma d'Aménagement et de Gestion des Eaux de la Lys), legally known as Établissement Lys Yser and operating under the public brand EPTB-Lys, is a French public territorial establishment (Établissement Public Territorial de Bassin) founded in 2000 and headquartered in Nœux-les-Mines, Pas-de-Calais. It manages the entire Lys river watershed in northern France on behalf of the Commission Locale de l'Eau, implementing the legally binding SAGE de la Lys framework under French Environmental Code Article L.214-2. Its mandate spans flood prevention, aquatic ecosystem management, water resource protection, and cross-border cooperation with Belgian partners. The organization serves communes, EPCIs, residents, schools, farmers, and project developers across the Hauts-de-France region, with all services provided free of charge and funded through public subsidies.

The operational portfolio is anchored on the SAGE de la Lys regulatory framework and operationalized through the PAPI flood prevention program (currently PAPI 4 in preparation following PAPI-Lys 3), the MIRAPI post-flood reconstruction device for installing batardeaux on vulnerable homes, and dedicated infrastructure including retention basins (Caucourt-Béthonsart 11,000 m³, Rely 17,000 m³), the La Biette dike (50,000 m³ storage), and the Quatre Fils Aymon structure (5.7 hectares). Technical capabilities include a 24/7 river monitoring sensor network coordinated with Voies Navigables de France, satellite imagery analysis for flood episode mapping, hydraulic modeling for flood simulation, and educational programs (INFOLYS KIDS for CM1–CM2 students, Infolys information platform). Cross-border initiatives include the EU Interreg–funded PROVALY, ResiRiver, CARE+, and FUSION projects, alongside a 3-year conservation agriculture program with SMAEL, the Chambre d'Agriculture Hauts-de-France, and APAD.

The business model is that of a publicly funded administrative entity: SYMSAGEL is owned and governed by local authorities as a syndicat mixte fermé, with no commercial revenue, no shareholders, and no product pricing. Funding flows from member commune and intercommunality contributions, the Agence de l'Eau Artois-Picardie (primary financial partner), the Région Hauts-de-France, the departmental councils of Pas-de-Calais and Nord, and European programs (Interreg France-Wallonie-Vlaanderen). With 15 direct employees and operational delivery largely contracted out, the organization functions as a small coordinating authority that leverages institutional mandate and grant funding to commission and oversee significant infrastructure, regulatory, and educational activity across the watershed.

Name

SYMSAGEL

Legal name

Établissement Lys Yser

Website

https://sage-lys.net

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

SYMSAGEL is a French public territorial establishment managing the Lys river watershed in northern France, delivering flood prevention, water resource protection, and aquatic ecosystem services under the legally binding SAGE framework for communes, residents, schools, farmers, and cross-border Belgian partners.

Ownership category

akta.pro rank

Product category

Watershed and Flood Risk Management Services

NAICS

Administration of Environmental Quality Programs (9241), Water, Sewage and Other Systems (2213), Water Supply and Irrigation Systems (22131)

SIC

Water Supply (4941), Electric, Gas & Sanitary Services (4900), Services-Facilities Support Management Services (8744)

akta.pro industry

PRIMARYBPAIACAG

Water Supply & Wastewater Utilities Administration

Business & Public Services/Public Sector & Government Administration/Local/Municipal Government Administration

SECONDARYBPAGAGAK

Water Resources & Watershed Protection

Business & Public Services/Nonprofit, NGO & Social Services/Environmental & Conservation Organizations

Keywords

• Watershed management services
• River basin governance
• Flood prevention programs
• Water resource management
• Aquatic environment protection

Headquarters

HQ city

Nœux-les-Mines

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Public Funding and Subsidies: SYMSAGEL operates as a public territorial establishment funded through contributions from member communes and intercommunalities, subsidies from government agencies (including Agence de l'Eau Artois-Picardie), regional council (Région Hauts-de-France), and departmental councils (Pas-de-Calais, Nord). The organization implements European projects (Interreg programs) that provide additional funding.

Distribution channels4 records

Marketing channels9 records

Core offering

SYMSAGEL is a French Établissement Public Territorial de Bassin that designs, coordinates and implements public policies for water management on the Lys river watershed, including the SAGE de la Lys master plan, the PAPI flood-prevention program, the MIRAPI post-flood reconstruction device, and the Infolys public information platform. It serves communes, intercommunities (EPCIs), residents, schools, farmers and project developers across the Pas-de-Calais territory and the cross-border Franco-Belgian area, funded by member contributions and public subsidies from the Agence de l'Eau and regional/departmental authorities.

Product overview

SYMSAGEL (Syndicat Mixte pour le Schéma d'Aménagement et de Gestion des Eaux de la Lys) operates as the water basin management authority for the Lys river watershed. The organization's primary offering is the SAGE de la Lys, a comprehensive water management framework that establishes rules for flood prevention, aquatic ecosystem protection, and water resource preservation. This core framework is operationalized through complementary programs: the PAPI flood prevention initiative (currently PAPI 4 in preparation, following PAPI-Lys 3), the MIRAPI post-flood reconstruction program, and various technical services including river maintenance, wetland preservation, and hydraulic infrastructure management. The organization also provides educational and planning support through PPMS (school safety plans), PCS (municipal emergency plans), and community engagement tools like Infolys information platform and INFOLYS KIDS educational program. Cross-border cooperation is maintained through European projects including PROVALY and ResiRiver.

Differentiator

Problem solved

Functional benefit

Brands

• Infolys: Information platform for water awareness and prevention
• Infolys Kids
• MIRAPI

Products and services

• SAGE de la Lys Strategic water-management master plan for the Lys watershed, defining objectives and rules for water resource protection, aquatic-environment preservation and flood-risk prevention across the SYMSAGEL perimeter; intended for communes, EPCIs, State services and partner institutions.
• PAPI (Programme d'Actions de Prévention des Inondations) Operational flood-prevention program covering structural works, monitoring, awareness-raising and risk-reduction actions on the Lys river and tributaries; intended for member communes, EPCIs and the public within the floodplain.
• MIRAPI (Mission d'Assistance post-inondation) Post-flood reconstruction and assistance service that supports communes and residents in recovery after a major flood event on the Lys river; mobilises technical, administrative and financial assistance.
• PROVALY Cross-border cooperation project on the Lys river between SYMSAGEL and Belgian water-management counterparts, coordinating flood prevention and water-quality actions across the Franco-Belgian border.
• ResiRiver European Interreg project on river resilience in which SYMSAGEL participates as a partner, contributing watershed-management expertise and pilot actions on the Lys basin.
• Infolys platform Public online platform providing real-time water-level data, flood alerts and informational content on the Lys watershed; intended for residents, elected officials, teachers, farmers and project developers in the perimeter.
• INFOLYS KIDS Pedagogical toolkit and program built on the Infolys platform, providing water-environment and flood-risk educational resources for primary and secondary schools in the watershed.
• PCS support service (Plan Communal de Sauvegarde) Support service helping member communes design, update and exercise their municipal emergency plans (PCS) for flood scenarios on the Lys watershed; includes template provision and technical assistance.
• PPMS support service (Plan Particulier de Mise en Sûreté) Support service helping schools in the watershed draft and update their PPMS (Plan Particulier de Mise en Sûreté) to address flood-risk scenarios; provided free of charge as part of SYMSAGEL's public-information mission.

Named customers3 records

Segments5 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

25 partnerships are on record, tiered core and minor.

• Provincie West-VlaanderencoreStrategic or Co-development Partner · 28 January 2026Lead coordinator of PROVALY project (Protection de la Vallée de l'Yser), a cross-border cooperation initiative under Interreg France-Wallonie-Vlaanderen aimed at strengthening resilience against climate change effects including floods and droughts across the Yser transboundary valley.
• De Vlaamse WaterwegcoreStrategic or Co-development PartnerFlemish waterway authority partner in PROVALY project contributing to cross-border water management coordination between France and Belgium.
• Vlaamse MilieumaatschappijcoreStrategic or Co-development PartnerFlemish environmental agency partner in PROVALY providing environmental expertise for transboundary water and climate adaptation initiatives.
• Waterbouwkundig LaboratoriumcoreTechnology or IntegrationFlemish hydraulic engineering laboratory contributing technical expertise to PROVALY project for water modeling and flood prevention analysis.
• ZuidijzerpoldercoreStrategic or Co-development PartnerLocal water management authority in Belgium contributing to PROVALY cross-border water governance coordination.
• Union Syndicale d'Aménagement Hydraulique du NordcoreStrategic or Co-development PartnerFrench hydraulic management syndicate participating in PROVALY project with SYMSAGEL for transboundary Yser valley protection.
• DREAL Hauts-de-FrancecoreStrategic or Co-development PartnerRegional directorate for environment supporting PROVALY as government authority providing regulatory and funding oversight.
• Institution Intercommunale des WateringuescoreStrategic or Co-development PartnerIntercommunal water management institution supporting PROVALY project with expertise in water regulation and polder management.
• Agence de l'Eau Artois-PicardiecoreStrategic or Co-development PartnerPrimary financial and technical partner supporting all SYMSAGEL activities including river maintenance, flood infrastructure, and environmental programs. Major funder of studies, works, and project animation across the Lys watershed.
• Service fédéral de la planification d'urgence du Gouverneur de la Flandre-OccidentalecoreStrategic or Co-development PartnerBelgian federal emergency planning authority supporting PROVALY cross-border coordination for disaster preparedness and response.
• Voies Navigables de France (VNF)coreTechnology or IntegrationFrench waterways authority collaborating with SYMSAGEL on flood management through sensor network deployment, 24/7 monitoring coordination, and intelligent infrastructure management to limit flood effects.
• Communauté d'Agglomération Béthune-Bruay Artois Lys Romane (CABBALR)coreStrategic or Co-development PartnerMajor intercommunal partner working on multiple projects including Water For Tomorrow innovation program, Grand-Nocq river widening, and infrastructure projects supporting SYMSAGEL initiatives.
• Communauté d'Agglomération Pays de Saint-Omer (CAPSO)coreStrategic or Co-development PartnerIntercommunal partner collaborating on MIRAPI batardeaux installation program, river maintenance, and flood protection measures.
• SMAEL (Syndicat Mixte d'Assainissement des Eaux du Littoral)coreStrategic or Co-development PartnerWater management syndicate collaborating on soil conservation, drinking water protection, and permaculture projects in the Lys watershed.
• Chambre d'Agriculture des Hauts-de-FrancecoreStrategic or Co-development PartnerAgricultural chamber partnering on soil conservation programs, conservation agriculture practices, hedgerow planting, and riverbank protection initiatives.
• APAD (Association pour la Promotion d'une Agriculture Durable)coreStrategic or Co-development PartnerSustainable agriculture association partnering with SYMSAGEL, SMAEL, and Chambre d'Agriculture on a 3-year conservation agriculture program supporting farmers with advice, training, and financial aid.
• Prévention MAIFcoreStrategic or Co-development PartnerInsurance company prevention association developing INFOLYS KIDS pedagogical tool for schools, combining risk prevention expertise with water education.
• AdoptaminorStrategic or Co-development PartnerSustainable stormwater management company providing expertise and showroom facilities for rainwater management solutions including noue (swale), green roofs, rain gardens, and permeable surfaces.
• Communauté de Communes des Campagnes de l'ArtoiscoreStrategic or Co-development PartnerLocal community collaborating on Caucourt-Béthonsart retention basin project inaugurated in 2022, demonstrating territorial solidarity in flood protection.
• Communauté de Communs Haut Pays du MeuilloisminorStrategic or Co-development PartnerIntercommunal partner collaborating on winter 2024-2025 river maintenance program.
• TernoisComminorStrategic or Co-development PartnerIntercommunal partner collaborating on winter 2024-2025 river maintenance program.
• Fédération pour la Pêche et la Protection du Milieu Aquatique 62minorStrategic or Co-development PartnerFishing federation leading rehabilitation of Bellefontaine vannage (sluice gate), restoring river continuity and ecological connectivity.
• UFC Que ChoisirminorStrategic or Co-development PartnerConsumer protection association partnering on drought awareness campaigns including leak detection video content.
• Université du LittoralminorStrategic or Co-development PartnerRegional university collaborating on Nature-Based Solutions study with five Master's students conducting research on adaptation strategies.
• Communauté d'Agglomération de Lens-Liévin (CALL)minorStrategic or Co-development PartnerAgglomeration community partnering with SYMSAGEL for INFOLYS KIDS launch event at Stade Bollaert, contributing to youth water education.

Scale indicators12 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• EPTB Seine Grands Lacs: Largest French Établissement Public Territorial de Bassin, managing the Seine upstream with major retention infrastructure (e.g., Lac-réservoir Marne). Comparable as a sibling EPTB operating the same legal framework, public funding model, and basin-wide flood/water mandate.
• EPTB Loire: Public territorial basin authority for the Loire, coordinating flood prevention, water resource management, and SAGE-equivalent plans. Closest structural peer given identical legal form (EPTB), funding mix (Agence de l'Eau + state + regions), and integrated river-basin mandate.
• EPTB Dordogne (EPIDOR): Public basin syndicate managing the Dordogne river basin with SAGE-style integrated water management. Highly comparable in governance, EU-project participation, and flood-prevention program structure.
• EPTB Garonne (SMEAG): Mixed syndicate (syndicat mixte) managing the Garonne river basin — note the parallel naming convention with SYMSAGEL ('Syndicat Mixte...'). Operates an identical legal structure and basin-wide water mandate at a larger geographic scale.
• Institution Intercommunale des Wateringues: Intercommunal institution for water management in the coastal/Flanders polder region, including parts of the Lys basin. Already a named SYMSAGEL partner; structurally similar as a public flood-and-water management body.
• EPTB Charente (Institution Charente): Public basin authority for the Charente river with flood prevention and water resource management mandates. Comparable legal status (EPTB), EU project participation, and SAGE-style program delivery.

Broad incumbents

• Voies Navigables de France (VNF): National waterways authority with whom SYMSAGEL coordinates on flood monitoring and infrastructure. Operates at much larger scale but is a peer in the public water-flood-management ecosystem, with overlapping technology (sensor networks) and coordination role.
• Agence de l'Eau Artois-Picardie: Primary funder and regulator for SYMSAGEL, but operating as a basin-level water agency with broader mandate and own budget (redevances, state subsidy). Comparable as a sister public agency administering the same geographic territory and water-policy framework.

Regional players

• Syndicat Mixte du Bassin de l'Authion: Mixed syndicate managing a smaller French river basin (Authion, Maine-et-Loire) with flood prevention and water management as core functions. Structurally comparable as a regional mixed syndicate, though at a smaller scale and different geography.
• Entente Oise-Aisne: Public EPTB-style establishment managing the Oise-Aisne basin in northern France, with overlapping geography and shared flood-risk profile. Highly relevant comparable on hydrological and regional-administration dimensions.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/infolys_media
• YouTubeyoutube.com/channel/UC
• Facebookfacebook.com/infolys.page
• LinkedInlinkedin.com/company/symsagel

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SYMSAGEL