Name

SIAAP

Legal name

Syndicat Interdépartemental pour l'Assainissement de l'Agglomération Parisienne (SIAAP)

Website

https://siaap.fr

Company type

Private

Founded year

1970

Operating status

Operating

Headcount range

1,001–5,000 employees

Ownership category

akta.pro rank

Product category

Wastewater Treatment & Sanitation Services

NAICS

Sewage Treatment Facilities (221320), Sewage Treatment Facilities (22132), Administration of Air and Water Resource and Solid Waste Management Programs (92411), Administration of Air and Water Resource and Solid Waste Management Programs (924110), Remediation Services (562910)

SIC

Sanitary Services (4950), Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

Water Resources, WASH & Integrated Water Management (BPADALAH)

Keywords

• Wastewater treatment services
• Public sanitation infrastructure
• Sewer network management
• Water quality monitoring
• Sludge valorization

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Supply Chain

Revenue model

1. Public Service Financing: SIAAP is a public sanitation syndicate (établissement public à caractère administratif) funded by member departments (Paris, Hauts-de-Seine, Val-de-Marne, Seine-Saint-Denis, Yvelines) and water/sanitation tariffs. Revenue is derived from public financing and water sanitation charges levied on users across the Greater Paris agglomeration.

Distribution channels3 records

Marketing channels9 records

Core offering

SIAAP (Syndicat Interdépartemental pour l'Assainissement de l'Agglomération Parisienne) is a French public administrative institution that collects, transports, and treats wastewater from the Greater Paris metropolitan area through six major treatment plants and a 420 km sanitation network. It also provides real-time network regulation via the MAGES control system, river water-quality monitoring via the MeSeine observatory, sludge valorization (thermal drying, compost), and environmental research programs (Mocopée, inneauvation).

Product overview

SIAAP operates as a public sanitation authority providing comprehensive wastewater treatment and environmental management services for the Greater Paris metropolitan area. The organization functions as a unified service platform comprising six major treatment plants (Seine Aval, Seine Valenton, Marne Aval, Seine Morée, Seine Centre, Seine Grésillons), supplemented by proprietary monitoring systems (MAGES for 24/7 network regulation, MeSeine for water quality observatory), and value-added services including event venue rental at La Cité de l'Eau, professional training programs, citizen participation initiatives (Jury de Nez, nuisance reporting), and research programs like Mocopée. The portfolio also includes sewage sludge thermal drying for energy recovery, peracetic acid disinfection systems, and agricultural compost production.

Differentiator

Problem solved

Functional benefit

Products and services

• Wastewater Treatment Services Core sanitation service collecting, transporting, and treating wastewater for member departments (Paris, Hauts-de-Seine, Val-de-Marne, Seine-Saint-Denis, Yvelines) and ultimately 8+ million residents of the Île-de-France region, including pollutant removal (organic, nitrogen, phosphorus) before discharge into the Seine and Marne rivers.
• MAGES (Maître d'Atelier de Gestion et de Supervision) Real-Time Network Regulation Real-time network regulation service that limits untreated discharges into natural environments during storm and combined sewer overflow events across the 420 km sanitation network.
• MeSeine Observatory (River Water Quality Monitoring) Continuous environmental monitoring service covering water quality, oxygenation, and biodiversity across the Seine and Marne rivers and tributaries, supporting regulatory compliance and public bathing safety (Olympic Seine swimming).
• Thermal Sludge Drying & Energy Recovery Industrial valorization service that dries sewage sludge into coal-like pellets for energy recovery at SIAAP plants, cement factories, thermal power plants, or for agricultural fertilizer use.
• La Cité de l'Eau et de l'Assainissement Event Venue Rental Venue rental service in a classified historic industrial building in Colombes for corporate events, conferences, congresses, seminars, training sessions, product launches, and prestigious receptions, with spaces ranging from 20 to 1,500 m².
• Professional Training & Educational Services Educational offerings including professional training for sanitation operators, free guided tours of treatment plants, and school workshops on wastewater treatment and aquatic biodiversity for the Île-de-France region.
• Environmental Monitoring Services (Odor, Biodiversity) Environmental services including odor prediction, real-time odor monitoring, treatment plant balance reporting, and biodiversity preservation to manage the impact of sanitation facilities on surrounding communities.
• Compost Production from Sewage Sludge Industrial composting service that combines dewatered sewage sludge with green waste, municipal waste, paper-cardboard, manures, and sawdust to produce compost for agricultural, horticultural, or forestry applications.
• Industrial Peracetic Acid Disinfection (Seine Valenton) Industrial-scale chemical disinfection of treated wastewater using peracetic acid at the Seine Valenton plant, enabling compliance with discharge standards while minimizing environmental impact.

Quantifiable outcome

• 65% sludge volume reduction through thermal drying, producing coal-like pellets for energy recovery or agricultural use
• +2 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Seven partnerships are on record, tiered minor and core.

• Tire Industry Project (TIP)minorStrategic or Co-development Partner · 1 January 2024The Tire Industry Project (TIP), a global coalition of tire manufacturers, has partnered with SIAAP to conduct a two-year pilot study (through 2026) at SIAAP's Valenton plant testing the effectiveness of wastewater treatment in removing tire and road wear particles (TRWP) from stormwater runoff. The study uses advanced pyrolysis GC/MS analysis and represents TIP's first real-world test of a priority mitigation measure from its 2024 white paper. Peer-reviewed results expected in early 2027.
• ERM (Environmental Resources Management)minorImplementation/ SI/ Consulting Partner · 1 January 2024ERM, an environmental consultancy, is partnered with SIAAP and the Tire Industry Project for the two-year TRWP removal pilot study at the Valenton plant. ERM provides technical consulting expertise for the study design and analysis methodology.
• Université de Technologie de Compiègne (UTC)coreStrategic or Co-development Partner · 1 January 2014UTC is a core research partner in the Mocopée program (MOdélisation, Contrôle et Optimisation des Procédés d'Épuration des Eaux) since 2014, co-coordinated with SIAAP and INRAE. Phase II (2018-2022) involved about 30 partners. UTC contributes scientific expertise in treatment process modeling, monitoring, and optimization.
• Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE)coreStrategic or Co-development Partner · 1 January 2014INRAE is a core research partner and co-coordinator of the Mocopée program alongside SIAAP and UTC. Contributes expertise in agricultural and environmental sciences, including sludge valorization and ecological aspects of water treatment.
• Inneauvation Programming PartnerscoreStrategic or Co-development Partner · 1 January 2014The inneauvation programming (inneauvation.fr) is an interdisciplinary research initiative promoting public innovation in sanitation. It encompasses Mocopée and other collaborative research initiatives involving scientific institutions, operational water sector actors, and environmental researchers. SIAAP serves as the anchoring institution for this collaborative platform.
• PIREN-Seine (Programme Interdisciplinaire de Recherche sur l'Environnement de la Seine)minorStrategic or Co-development Partner · 1 January 1992Interdisciplinary environmental research program on the Seine, bringing together researchers and water management stakeholders. Explores both humanities (population, history, economic uses) and exact sciences (chemistry, hydrogeology) related to the Seine basin. SIAAP contributes operational data and participates in research coordination.
• OPUR (Observatoire des Polluants Urbains)minorStrategic or Co-development PartnerInterdisciplinary research program on urban pollutants in the Seine, contributing scientific knowledge on emerging contaminants and their fate in wastewater treatment systems.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Eau de Paris: Municipal drinking water authority for the City of Paris (vs. SIAAP's wastewater mandate). Direct sister institution within Greater Paris governance, providing the closest governance and jurisdictional analog in the same metropolitan ecosystem.
• New York City Department of Environmental Protection: Municipal agency managing NYC's water supply and wastewater infrastructure for ~8M+ residents. Operates the largest wastewater treatment capacity in the US and serves as a public-sector benchmark for capital-city sanitation at scale comparable to SIAAP.
• Melbourne Water: Statutory authority managing Melbourne's waterway and major wastewater services for ~5M residents across greater metropolitan Melbourne. Public-authority structure with metropolitan sanitation mandate closely mirrors SIAAP's institutional design.
• DC Water: Independent authority providing water and wastewater services to the District of Columbia and surrounding jurisdictions. Public-utility governance model with comparable regulatory mandate and capital-city customer base make it a strong functional peer.
• Berliner Wasserbetriebe: Municipal water and wastewater utility owned by the State of Berlin, serving ~3.7M residents across a major European capital region. Closest analogue to SIAAP by structure (public municipal utility, capital-city metropolitan service area, integrated water/wastewater mandate).
• Thames Water: Largest water and sewerage company in the UK by customers served, covering the Greater London metropolitan area (~15M customers). Direct functional peer to SIAAP as a major metropolitan sanitation provider at comparable scale and customer concentration.
• Hamburg Wasser: Municipal water and wastewater utility owned by the Free and Hanseatic City of Hamburg, serving ~1.8M residents. Public-ownership structure and metropolitan focus make it a tight European operational peer to SIAAP.
• Singapore PUB (Public Utilities Board): Singapore's national water agency managing the full water cycle (catchment, treatment, reclamation, distribution) for the entire city-state. Public-agency governance and integrated sanitation mandate at metropolitan scale position PUB as a global analogue to SIAAP's regulatory model.

Regional players

• Eau du Grand Lyon: Public water and sanitation operator for the Lyon metropolitan area, regulated by Métropole de Lyon. Comparable French public-operator model serving a secondary metropolitan market, providing a regional peer for benchmarking operating practices.

Broad incumbents

• Severn Trent: Listed water and sewerage company serving 4.6M households across the Midlands and Wales. Comparable in scale of wastewater operations but operates under a regulated private-ownership model rather than SIAAP's public syndicate structure.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/Le_SIAAP
• YouTubeyoutube.com/user/SIAAPassainissement
• Facebookfacebook.com/LeSIAAP
• LinkedInlinkedin.com/company/77376
• Instagraminstagram.com/le_siaap

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about SIAAP