Finland. Helsinki Region Environmental Services Authority

Date of agreement:24 Nov 2015
Customer:Helsinki Region Environmental Services Authority
Amount in EUR:EUR 115 million
Maturity:30 years
NACE sector / loan type:Collection, purification and distribution of water

This loan has a positive effect on maritime environments: 100%

Financing from NIB Environmental Bond proceeds

NEB-eligible share: 100%

NEB category: Blue Bond project

Amount disbursed: EUR 115 million

Note: For loans in other currencies than EUR, the equivalent in EUR is based on the exchange rate effective for the disbursement. Read more about the NIB Environmental Bonds


The loan is has been provided for the construction of a wastewater treatment plant in Blominmäki, in the city of Espoo in Southern Finland.

The new plant will replace the wastewater facility in Suomenoja, which is reaching the end of its operational life. The Blominmäki plant will be built underground and treat wastewater from 400,000 inhabitants in the Helsinki metropolitan area.

Commissioning of the new facility is scheduled for 2020.

Helsingin Seudun Ympäristöpalvelut (Helsinki Region Environmental Services Authority) is a municipal federation responsible for water services, waste management and regional information in the Helsinki metropolitan area. The owners of HSY are the municipalities of Helsinki (58%), Espoo (22.3%), Vantaa (19.4%) and Kauniainen (0.3%).

Fulfilment of NIB's mandate

The productivity levels of the Blominmäki facility are expected to be at least 20% higher than those of the existing plant in Suomenoja. The larger treatment capacity of the new plant will be able to accommodate an estimated 50 per cent increase in load volumes between 2015 and 2040.

The new facility will include treatment processes for reducing the levels of nutrients pollution in effluent water. The underground nature of the facility will reduce odour and noise impacts on the surrounding environment.

Sustainability summary

This is a project with a potentially extensive environmental and/or social impact (category A, read more)

This project has been categorised A, and information about NIB’s considerations regarding financing the project was made public on NIB’s website for 30 days in April–May 2015.

During the construction phase, Helsingin Seudun Ympäristöpalvelut will apply measures to lower noise and vibration impacts on surrounding areas. The tertiary water treatment methods employed in the new plant are expected to reduce the discharge of nitrogen loads to the Baltic Sea by more than 300 tonnes per year. The project is assessed not to have any significant impacts on Natura 2000 areas.

Press release

NIB funds wastewater treatment for Helsinki metropolitan area

Related resources



Wastewater treatment is key to protecting our Baltic Sea