What Kappalaforbundet does

Käppalaförbundet is a Swedish municipal association (kommunalt förbund) founded in 1957 that operates Käppalaverket, one of Sweden's largest wastewater treatment plants, located on Lidingö in the Stockholm archipelago. The association provides wastewater treatment and resource recovery services to 11 member municipalities — Danderyd, Lidingö, Nacka, Sigtuna, Sollentuna, Solna, Täby, Upplands-Bro, Upplands Väsby, Vallentuna, and Värmdö — serving 758,313 connected persons and treating 51.9 million cubic meters of wastewater in 2025. A twelfth member, Knivsta, has been approved with connection planned for approximately 2026.

The core technology stack centers on biological, chemical, and mechanical wastewater treatment with advanced resource recovery. Käppalaverket is currently undergoing the multi-year Käppalaverket 3.0 upgrade program, which retrofits treatment basins with MBBR (Moving Bed Biofilm Reactor) technology — described as among the world's largest such retrofits — to achieve 40% nitrogen, 33% phosphorus, and 25% organic material emission reductions required under new discharge limits effective July 1, 2028. The facility also operates sludge digestion producing biogas delivered to SL (Stockholm Public Transport) as vehicle fuel (3.7 million normal cubic meters in 2025), dewatered sludge for agricultural use (approximately 32,000 tonnes in 2025), and heat recovery. An ISO 17025 accredited in-house laboratory supports continuous monitoring, and a digital twin research project is underway with IVL Swedish Environmental Research Institute.

Revenue is generated through annual fees from member municipalities calibrated on usage and connected population, supplemented by government grants (notably from Naturvårdsverket) for development projects and biogas sales to SL. As a public utility governed by Swedish municipal law, the organization is collectively owned by its member municipalities and led by a board and assembly composed of municipal representatives; it is not equity-investable in the traditional PE/VC sense. Total loan facility stood at 7.4 billion SEK as of April 2025, financing the 3 billion SEK first-phase Käppalaverket 3.0 program and related capacity investments.

Name

Kappalaforbundet

Legal name

Käppalaförbundet

Website

https://kappala.se

Company type

Private

Founded year

1957

Operating status

Operating

Headcount range

101–250 employees

Short description

Käppalaförbundet is a Swedish municipal association operating Käppalaverket, one of Sweden's largest wastewater treatment plants, serving 11 member municipalities and 758,313 connected persons in the Stockholm region with treatment and resource recovery services.

Ownership category

akta.pro rank

Product category

Municipal Wastewater Treatment Services

NAICS

Sewage Treatment Facilities (22132), Water, Sewage and Other Systems (2213)

SIC

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

akta.pro primary industry

Decentralized/Package Wastewater Systems (Small/Remote) (EUANADAE)

Keywords

• Municipal wastewater treatment
• Resource recovery services
• Biogas production
• Sewage sludge processing
• Water utility services

Headquarters

HQ city

Lidingö

HQ country

Sweden

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Annual fees from member municipalities: Member municipalities pay annual fees to cover operations, maintenance, and capital investments. The 2025 result was better than budget, with 24.5 million SEK returned to member municipalities. Fees are adjusted annually based on budget decisions by the association board.
2. Government grants and project funding: Receives funding from Naturvårdsverket for development projects such as pharmaceutical removal studies. In 2022, received 1.9 Mkr for pharmaceutical removal development project.
3. Biogas sales to SL: Biogas produced from sludge digestion is delivered as vehicle fuel to SL (Stockholm Public Transport). When SL cannot receive gas, controlled flaring occurs.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Käppalaförbundet is a Swedish municipal association that operates Käppalaverket, one of Sweden's largest wastewater treatment plants. It collects and treats sewage from eleven member municipalities in the Stockholm region, and recovers resources from the treatment process including biogas (delivered as vehicle fuel to Stockholm Public Transport), processed sludge for agricultural use, and heat. The organization also runs an in-house ISO 17025-accredited laboratory and a major plant upgrade program (Käppalaverket 3.0).

Product overview

Käppalaförbundet operates Käppalaverket, one of Sweden's largest wastewater treatment facilities serving over 500,000 people across eleven municipalities. The organization provides a unified suite of wastewater treatment and resource recovery services built around a single integrated facility. Core offerings include wastewater treatment (Avloppsrening) and resource recovery (Resursutvinning) producing biogas, processed sludge, and heat. Supporting services include laboratory analysis (ISO 17025 accredited), quality control, and environmental compliance monitoring. The current major initiative is the Käppalaverket 3.0 upgrade program, which implements MBBR (Moving Bed Biofilm Reactor) technology to achieve 40% nitrogen reduction, 33% phosphorus reduction, and 25% organic material reduction while doubling treatment capacity.

Differentiator

Problem solved

Functional benefit

Products and services

• Käppalaverket Wastewater Treatment Plant One of Sweden's largest wastewater treatment plants, treating sewage from 11 member municipalities in the Stockholm region and serving over 750,000 connected persons. Operates biological, chemical, and mechanical treatment processes.
• Avloppsrening (Wastewater Treatment Services) Core sewage treatment service including purification processes, high-flow excess water management, and discharge to the Stockholm archipelago for member municipalities.
• Resursutvinning (Resource Recovery) Recovery of resources from wastewater including biogas production, sludge processing for agricultural use, and heat recovery, returning these materials to the circular economy.
• Biogas Production Biogas produced from sludge digestion in digesters, upgraded and delivered as vehicle fuel to SL (Stockholm Public Transport). In 2025, produced 3.7 million normal cubic meters of biogas.
• Sludge (Slam) Processing Processed and dewatered sewage sludge produced from the treatment process, returned to society's circular economy for agricultural use. Approximately 32,000 tonnes produced in 2025.
• Heat Recovery (Värme) Heat recovery from the wastewater treatment process, contributing to energy efficiency and sustainability.
• MBBR Technology Upgrade (Moving Bed Biofilm Reactor) Advanced biological treatment technology using carriers for more efficient nitrogen removal and increased capacity. Part of the Kappalaverket 3.0 upgrade program with basins among the largest in the world being retrofitted with MBBR.
• Laboratory Services (Laboratorium) In-house accredited laboratory performing chemical analyses on samples from the treatment process, certified according to ISO 17025.
• Control and Quality Services (Kontroll och kvalitet) Quality control, environmental management, certification management, and regulatory compliance monitoring services.
• Käppalaverket 3.0 Upgrade Program Multi-phase major upgrade program for the wastewater treatment plant to meet stricter emission requirements (40% nitrogen reduction, 33% phosphorus reduction, 25% organic material reduction) and double treatment capacity.

Quantifiable outcome

• Wastewater treated: 51.9 million cubic meters in 2025
• +4 more outcomes

Named customers12 records

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core and minor.

• SL (Stockholm Public Transport)coreStrategic or Co-development PartnerSL receives biogas produced from sludge digestion at Käppalaverket for use as vehicle fuel in buses. This creates a circular economy where waste is converted to renewable fuel for public transportation.
• NCCcoreImplementation/ SI/ Consulting PartnerNCC is the construction partner for the major renovation and upgrade of Käppalaverket through a cooperation contract. The renovation of five treatment lines will be conducted in partnership with NCC over approximately eight years starting August 2021.
• IVL Swedish Environmental Research InstituteminorStrategic or Co-development PartnerCollaborates on research projects including industrial PhD projects on digital twins at wastewater treatment plants and sustainable carbon recovery from sludge.
• Stockholm ExergiminorStrategic or Co-development PartnerCollaborated on pilot projects to incinerate sludge from Käppalaverket together with biofuel at Värtaverket. The end product is intended for use as fertilizer on forest land.
• Water Wise Societies Research ProgramminorStrategic or Co-development PartnerParticipates in the Water Wise Societies research program funded through Impact Innovation, together with Stockholm Vatten och Avfall, Norrvatten, and SYVAB.
• Svenskt Vatten (Swedish Water Association)minorStrategic or Co-development PartnerLeads a buyer group on pharmaceutical treatment and microplastics financed by Naturvårdsverket. Active participant in industry initiatives including Klimatneutral VA-bransch 2030.

Scale indicators10 records

Recent moves12 records

Expansion highlights6 records

Regional players

• Norrvatten: Stockholm-area drinking water utility serving northern municipalities. Directly relevant because the former Käppalaförbundet VD Andreas Thunberg moved to lead Norrvatten from 2023, demonstrating competitive adjacency in the regional water/wastewater market.
• VA SYD: Municipal water and wastewater utility serving Malmö and surrounding municipalities in Skåne. Comparable Swedish municipal utility structure with shared wastewater treatment infrastructure and resource recovery focus.
• NSVA (Nordvästra Skånes Vatten och Avlopp): Regional water and wastewater utility in northwestern Skåne. Comparable structure as a Swedish municipal association operating shared treatment infrastructure with multiple member municipalities.
• Roslagsvatten: Stockholm-area water utility serving northern coastal municipalities. Operates in adjacent geography to Käppalaförbundet with overlapping regional customer base and municipal ownership model.

Direct peers

• Gryaab: Operates Ryaverket in Gothenburg, one of Sweden's largest WWTPs serving multiple municipalities in western Sweden. Highly comparable in scale, multi-municipal governance, and upcoming major upgrades with stricter discharge limits.
• Tekniska verken i Linköping: Swedish municipal utility combining water, waste, and energy operations with comparable resource recovery (biogas, sludge-to-fertilizer) from wastewater treatment in the Linköping region. Operates under similar municipal ownership and ESG-driven model.
• Stockholm Vatten och Avfall: Stockholm's largest water and wastewater utility operating in the same Stockholm region as Käppalaförbundet. Both serve overlapping municipal customers and operate large-scale municipal wastewater treatment plants with regulatory discharge into the Baltic Sea catchment.
• SYVAB (Sydvästra Stockholmsregionens VA): Wastewater treatment company operating Himmerfjärdsverket, one of Sweden's largest municipal WWTPs serving the southwestern Stockholm region. Direct comparability in scale, municipal association structure, and resource recovery initiatives.

Broad incumbents

• Severn Trent: Major regulated UK water and wastewater utility serving ~8 million customers. Comparable in regulated municipal utility structure, large-scale wastewater treatment, and ongoing major infrastructure investment programs.
• Veolia Water Technologies: Major global water and wastewater treatment operator with operations across municipal and industrial segments. Comparable in providing MBBR and similar advanced treatment technologies, and as a competitor/contract operator to municipal utilities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebooksv-se.facebook.com/kappalaforbundet
• LinkedInlinkedin.com/company/kappalaforbundet
• Instagraminstagram.com/kappalaforbundet

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

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 Kappalaforbundet