Highlights from 2025
For our company, 2025 marked a busy period, with a focus on development, that was crowned by the "Green Company of the Year" award. This reassures us that we are on the right track in our efforts to protect the environment and reduce our customers' environmental footprint.
Chairman’s statement
Sustainability and environment protection are integrated into everything we do. As the largest water company in Estonia, our business affects more than a third of the population. We recognise this and provide services that meet all requirements, taking into account the impact of our business on the surrounding living and natural environment. The tap water we produce meets all the applicable drinking water standards and the quality of the treated effluent even outperforms the applicable standards.
Significant progress has been made in handling customer enquiries over the year. There has been a gradual improvement in customer satisfaction and feedback, particularly with regard to contracts, billing and water meter replacement. Customer focus is and will remain one of our key priorities. We are continuing to develop ways to communicate with customers promptly and ensure a smooth exchange of information at all times.
Investments were made to ensure environment protection, sustainable infrastructure, and the continuity of the vital water services we provide. We also continued to expand the use of innovative technologies, such as producing environmentally friendly heat and electricity from biogas generated during the wastewater treatment process, renovating pipes using no-dig methods, and installing remote reading water meters.
We now use only electricity from renewable sources and have set ourselves a number of ambitious targets for 2030, including reducing our energy consumption and producing our own renewable energy. At our wastewater treatment plant, we treat nearly 40% of all municipal wastewater in Estonia. We do this with the utmost care and efficiency, going above and beyond what is required to keep the Baltic Sea clean. A combined heat and power generation plant has been successfully commissioned at the wastewater treatment plant. In 2025, it produced all the heat and more than half of the electricity required for the treatment processes.
On the last day of 2025, an exceptional natural phenomenon – frazil ice – put our crisis plan to the test. Fortunately, the team resolved the resulting disruptions quickly. Although the drop in water pressure affected consumers in several districts of the city, the usual water supply was restored to all consumption points during New Year's Eve. We are analysing technologies to mitigate the impact of similar natural phenomenon and improve customer notification systems based on this event. We will also continue investments that improve the sustainability of the city's water and sewer networks. In 2026, we will continue to construct more borehole pumping stations in the Lasnamäe area.
To ensure that the water services we provide are of a high standard, it is important to involve interest groups in our processes. A good example of cooperation is the pipe work we carry out in the city during the summer months. We are increasingly carrying out these projects jointly with the city and other utility owners. This minimises disruption for residents and the city. The year 2025 was significant for us as we laid and reconstructed 45.1 kilometres of pipes, 49% of which were constructed using environmentally friendly no-dig methods.
In 2025, major pipe construction work took place on Kolde Avenue as part of the development of a strategic stormwater receiving system for the North Tallinn area, on Peterburi Road in cooperation with the City of Tallinn, and on Retke Road in cooperation with Utilitas. Pipe construction also continued on Paljassaare Road. The construction of the Nõlvaku collector is in its final stages, with work to upgrade the ventilation systems in progress. Work started on the reconstruction of water and sewer pipes in Lauteri Street and at the intersection of Endla and Tehnika streets. The renovation of the water pipes in Bornhöhe Road and the construction work in Tuukri and Uus-Sadama Streets, which form part of the extension to the stormwater collector starting from Reidi Road, have now been completed. In cooperation with the City of Tallinn and Utilitas, the renovation of Värvi and Mustjõe streets was completed.
The construction of separate stormwater systems is an important contribution to the development of urban areas, as it helps to reduce the risk of flooding during periods of heavy rainfall.
Investing for the future
In 2025, Tallinna Vesi continued to install smart water meters at a rapid pace. This will free our customers from the obligation of submitting their water meter readings every month. More than 80% of customers already have new smart meters, and the plan is to cover the entire service area with remote reading water meters by the end of 2026. Also, the verification period has been extended from five to ten years. This means that the water meter can remain in operation at the customer's premises for ten years. This helps to keep the cost of water services affordable for consumers while improving the customer experience.
The new meters provide information on water consumption, giving us a better indication of water consumption in our service area and allowing us to detect leaks in customer pipes as early as possible. This will help to protect the environment and minimise the risk of property damage caused by water accidents.
In 2025, Tallinna Vesi invested €56 million in its fixed assets. This exceeded the amount invested in the previous year. These investments ensure the continuity of water services in our service area, improve customer experience and enhance service quality.
The investment plan for the coming years is based on the Tallinn Public Water Supply and Sewerage Development Plan for 2023–2034. It aims to reduce the environmental impact of water use and ensure the continuity of services and sustainable urban development. These and future investments will ensure that our customers continue to receive high-quality drinking water and help keep nature clean. Using modern technologies and materials will increase the average lifespan of pipes and improve the efficiency of treatment systems. Thanks to effective investment, the number of blockages decreased by 18% in 2025, while the number of water emergencies fell by 23%, improving the quality of water services.
Modern technologies
In 2025, investment projects continued at the treatment plants. These included the renovation of clarifiers and filters at the Ülemiste Water Treatment Plant, as well as preparations for large-scale projects. One of these projects involves modernising and reconstructing the ozone production process used in water treatment. These projects aim to reduce energy consumption, improve the reliability of the treatment plant and increase its production capacity.
The major projects at the Paljassaare Wastewater Treatment Plant in 2025 included modernising the mechanical screens and sludge treatment and reconstructing the secondary clarifiers. Over the next three years, we will reconstruct 12 secondary clarifiers, which will further enhance our biological treatment. Primary screens have been installed at the main pumping station to enhance the mechanical treatment process and, consequently, the entire wastewater treatment process.
Another important project that has started in Paljassaare is the construction of Utilitas' wastewater and seawater heat pump plant. By early 2026, the plant will start supplying heat produced from wastewater and seawater to the district heating network in Tallinn.
Our subsidiary Watercom continued to expand the use of ice-pigging technology for cleaning water pipes, which was launched in 2023. Ice-pigging is many times more efficient, faster and better for the environment than any other method of maintenance used to date. The service has got off to a good start and has attracted interest from a number of companies using the pipe systems as part of their core business. In 2025, the company started to reconstruct sewer pipes using a trenchless, or no-dig, method. This approach to pipe construction is more environmentally friendly and causes minimal disruption to urban spaces.
High quality that is proven
Quality indicators showing consistently high performance prove that the water and wastewater services provided by Tallinna Vesi are reliable and safe – 99.5% of the tap water samples taken in 2025 met all the strict quality standards for drinking water.
Clean drinking water is a valuable resource that cannot be taken for granted. It takes a lot of people, strategic work and science to deliver excellent water quality. Clean tap water has been achieved through targeted investment, an efficient water treatment, regular monitoring, and continuous preventive maintenance of the water network. Over 90% of Tallinners get their drinking water from Lake Ülemiste, a surface water source that is environmentally friendly and quickly renewing.
Over 165 km of the water network was cleaned using the ice-pigging method in 2025. Ice-pigging is a unique maintenance technology that involves preparing a mass of ice flakes from a solution of water and table salt and pumping this mass through a water pipe. In the past three years, over 450 km of the water network has been cleaned using this method.
In 2025, we took out over 1,150 tonnes of debris, 200 tonnes of grit, 1,940 tonnes of nitrogen and 240 tonnes of phosphorus from the wastewater. Throughout the year, the treated effluent from the Paljassaare Wastewater Treatment Plant met all applicable standards and even outperformed them for many parameters.
Contribution to the community
Throughout the summer, 60 public water taps were available across Tallinn, providing clean drinking water for all. In addition, Tallinna Vesi supported a number of community and sports events, such as the Investment Festival and IRONMAN Tallinn – just to name those with the largest number of visitors – by providing tanks with fresh water. We were also present at the major event of 2025, the Song and Dance Celebration "Iseoma" ("Kinship"), and provided fresh tap water to all participants.
In August, the company took part in the Opinion Festival, chairing a discussion on Estonia as a small country with big initiatives on the "Energetic Economy" stage. Also in that month, the 53rd annual run around Lake Ülemiste, hosted by Tallinna Vesi, took place at Ülemiste. We contributed to Impact Day, a sustainability festival promoting environmental education, and community events, such as Tallinn Old Town Days, summer days for large families in Tallinn and Harju County, Kalamaja Days, Tallinn Urban Space Festival, and KopliFest.
As a supporter of the Estonian Paralympic Committee, the company contributed to the preparations of Estonian para-athletes for both smaller competitions and for the 2026 Winter Paralympic Games.
We provided our support to organizations that do commendable work helping those in need, such as the Estonian Agrenska Foundation, the Autismikool Charity Fund, the cancer treatment foundation The Gift of Life, the Tallinn Women's Crisis Centre, the Food Bank, and the Tallinn Children's Hospital Foundation. We also continued to support the Kindergarten Õunake and the Ristiku Primary School in Tallinn.
We organised open days and guided tours at the Ülemiste Water Treatment Plant and the Paljassaare Wastewater Treatment Plant, held discussion groups on water and environment-related topics, and participated in the Baltic-wide conference organised by the Estonian Waterworks Association. These initiatives attracted a total of more than 3,000 participants. For the second year in a row, we carried out a cooperation project with students from the Estonian Academy of Arts, who came up with design solutions for selected water pumping stations and decorated the facades of these buildings with eye-catching street art.
Outlook for 2026
As we enter the next year, we will carry on with our planned investments to secure and develop the vital water services that we provide. A number of projects mentioned above, involving the reconstruction of pipes – in cooperation with other utility owners and the City of Tallinn – and the construction of stormwater systems, will continue. We are moving forward with the ozonation project at the water treatment plant, renovating the secondary clarifiers at the wastewater treatment plant, and reconstructing the wet well at the main pumping station. We are also optimising the wastewater treatment process, using artificial intelligence and smart technologies to reduce variable costs in wastewater treatment.
We believe it is important to contribute to the Estonian water industry as a whole. To this end, we participate in working groups organised by both the Estonian Waterworks Association and the European Federation of National Associations of Water Services (EUREAU). We also contribute our expertise to the preparations for the water reform.
We are also continuing to work towards meeting our legal obligation to harmonise service prices for private and business customers, while maintaining the investment capacity necessary to ensure clean drinking water, a safe environment and the continuity of the services we provide. In order to harmonise prices, a change needs to be introduced in the main areas of Tallinn and Saue by the summer of 2026. The timing of the change is subject to the decision by the Competition Authority.
With the succession planning in mind, we will continue to reach out to young people and offer scholarships and internship opportunities. We will also maintain our focus on workplace safety. This is a topic that we drew attention to in 2025 with our internal campaign, “Safety starts with me!”.
I would like to thank the dedicated team at Tallinna Vesi and Watercom, the Supervisory Council members, our customers and consumers, and our cooperation partners for their constructive and positive cooperation!
Aleksandr Timofejev
Chairman of the Board
Highlights from 2025
Tallinna Vesi
20 years on the stock exchange
In the summer of 2025, we reached an important milestone – 20 years on the stock exchange. As the largest water utility in Estonia, we have played an important role in developing the water sector and fostering cooperation between companies in this field. We hope that this is a meaningful investment for our investors. Just as it is meaningful work for us.
We were awarded the Green Company of the Year title at the Estonian Successful Companies Awards organised by the business daily Äripäev. This shows that our actions have an impact and that we are doing meaningful work. Sustainability is integrated into our daily work and strategic decisions. Our focus is on implementing energy-efficient solutions and ensuring sustainability. We construct climate-resilient infrastructure and rehabilitate water and sewer networks with minimal environmental impact.
We are the Green Company of the Year
We invested in improvements to wastewater treatment
The reconstruction of the existing screens at the wastewater treatment plant has now been completed. In addition, new screens were installed in the main pumping station. This improves the capability to remove debris in the first treatment stage and makes the entire treatment process more efficient.
We construct stormwater systems to mitigate flooding
Extensive work was carried out in 2025 to construct strategic stormwater receiving systems. These are prerequisites for a separate sewer system that helps alleviate flooding and reduce the load on the wastewater treatment plant. Major construction work was completed in Kopli Street, Paljassaare Road, in the areas of Lahepea Street and Kolde Avenue, as well as in Tuukri and Uus-Sadama streets.
We produce electricity and heat from wastewater
We produce electricity and heat from wastewater
Following a successful test period, the combined heat and power (CHP) plant has begun operating at full capacity. Set up on the territory of the Paljassaare Wastewater Treatment Plant, the CHP plant produces energy in a most environmentally friendly way, upcycling a by-product of wastewater treatment – sewage sludge – for biogas production. The CHP plant and existing technologies have made it possible to fully cover the heat demand of the Paljassaare Wastewater Treatment Plant and nearly half of its electricity demand. This is an excellent example of applying the principles of circular economy in practice.
We are constructing the capital's first coastal stormwater detention pond
We are constructing a coastal detention pond in the Lahepea Street area in North Tallinn, to prevent flooding and keep the Baltic Sea clean. A detention pond is one of the solutions that helps to cope with increased rainfall and treat stormwater before releasing it into the sea. The detention pond is expected to be completed in the first half of 2026.
Watercom successfully launched a new service
Watercom introduced a no-dig method for reconstructing sewer pipes using CIPP (cured-in-place pipe) technology. Last year, around 6 km of gravity sewer pipes were reconstructed without digging up the streets, using the new equipment instead.
The year 2025 brought us several recognitions. We received the silver label of the "Supporter of National Defenders" award, presented by the Minister of Defence, in recognition of companies and organisations that have excelled in supporting national defence. The Estonian Waterworks Association recognised two of our long-standing employees and named the CHP plant at Paljassaare the Water Achievement of the Year.
In June, we were once again recognised with a Corporate Social Responsibility Certificate and gold level quality label, which is an important recognition for us and something we have worked towards together as a company. Receiving the highest level quality label for the third time demonstrates our commitment to responsibility and consistency in our actions.
Tallinna Vesi’s efforts
were recognised
We took a record amount of fresh water to the Song and Dance Celebration
Tallinna Vesi provided tens of thousands of participants at the Song and Dance Celebration with fresh drinking water. Our statistics show that around 3 million litres of water were used from taps and tanks at both celebration and accommodation venues. This means that using refillable water bottles and free water points prevented the production of over 230,000 plastic water bottles. The company has been supplying water to this large-scale event for several decades.
We opened the summer season of public drinking water taps with a tap running event
In spring, we opened 60 public water points in Tallinn so that everyone has access to clean drinking water during the summer season. The opening of the taps was celebrated for the first time with a running event, which attracted dozens of running enthusiasts.
In preparation for the summer events season, we made the drinking water taps at the Song Festival Grounds more visible by marking them.Suviste ürituste hooajaks märgistasime eraldi ka lauluväljaku joogiveekraanid, et need oleksid suurüritustel silmatorkavamad.
Tallinna Vesi and EKA students decorated
the pumping stations with street art
In the summer of 2025, Tallinna Vesi and the Estonian Academy of Arts (EKA) continued a cooperation project. As a result, four pumping stations in Tallinn were decorated with works by young artists. Now in its second year, this project aims to enrich urban spaces with street art created by young artists, providing them with an outlet for their creativity. This time, four pumping stations received a fresh look: Ehte 7b, Paldiski Road 80d, Vinkli 2 and Sõle 39b.
We offer scholarships to successful students
We support and recognise successful students in universities and vocational schools to help them become leaders in their field. We believe it is important to motivate hardworking, active students and to promote the vital water sector. At the same time, we want to attract professionals who have up-to-date knowledge to join the company. In 2025, we awarded scholarships at TalTech, Tallinn University of Applied Sciences, Estonian University of Life Sciences, Tallinn Industrial Education Centre, Techno TLN (Tallinn Technology College) and Tallinn Applied College.
We helped people with fewer opportunities
We supported the Kindergarten Õunake and the Ristiku Primary School in Tallinn, the Estonian Agrenska Foundation, the Tallinn Children's Hospital Foundation, the Autismikool Charity Fund, the cancer treatment fund The Gift of Life, the North Estonian Association of the Blind, the Tallinn Women's Crisis Centre and the Food Bank.
As a supporter of the Estonian Paralympic Committee, the company contributed to the preparations of Estonian para-athletes for both smaller competitions and for the 2026 Winter Paralympic Games.
Contributing to the
local community
In 2025, Tallinna Vesi was present at a number of community and sports events, such as the Song and Dance Celebration, and IRONMAN Tallinn — just to name those with the largest number of visitors — providing fresh water from tanks.
In spring, we discussed crisis resilience in the water sector at the Baltic Water Works conference, as well as the challenges posed by climate change at the annual Natural Resources conference. In July, we took part in a panel discussion on dividend stocks at the Investment Festival. In August, we chaired a discussion on Estonia as a small country with big initiatives on the "Energetic Economy" stage at the Opinion Festival.
Also in that month, the 53rd annual run around Lake Ülemiste, hosted by Tallinna Vesi, took place at Ülemiste. We contributed to Impact Day, a sustainability festival promoting environmental education, and community events, such as Tallinn Old Town Days, summer days for large families in Tallinn and Harju County, Tallinn Movement Festival, Kalamaja Days, the Kopli Lines Run, Tallinn Urban Space Festival, and KopliFest.
We organised open days and guided tours at the Ülemiste Water Treatment Plant and the Paljassaare Wastewater Treatment Plant, held discussion groups on water and environment-related topics.