Welcome to find support for water protection!

Welcome to finding information, examples and practical tips for water protection!

Tools for water protection is a web-based toolbox providing support for implementing water protection actions at local level. It is designed for professionals and experts who do concrete work, strategic planning or make decisions on water protection in cities, municipalities, companies, NGOs or other organisations.

The Toolbox provides information and tools that assist with water protection. In addition to practical tips, tools and background information, in the Bank of Actions you can browse actions that local organisations have already implemented for the protection of local waters and the Baltic Sea – and you can also share your organisation’s own actions!

This site was established in 2015 by the EU Life+ funded project CITYWATER, in collaboration with the Baltic Sea Challenge. The first tools are based on the results of the CITYWATER project. The site is now managed and updated by the Baltic Sea Challenge. More tools and actions are needed – please contact us and tell us about your ideas!

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The Baltic Sea Challenge

Action at the local level is the key! Join the network and find ideas, examples, best practices and possibilities for collaboration.

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Communication strategy

Find tips and guidelines on how to communicate the benefits of water protection efficiently to get your message through!

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Cost-benefit analysis

Learn how the benefits of water protection can be assessed and compared to the costs of implementation!

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Storm water solutions

Considering implementing sustainable storm water solutions? Read about solutions, tips and recommendations for practical work!

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Find inspiration and ideas in water protection actions implemented by the Baltic Sea Challenge network.
Browse the Bank of Actions!


Awareness raising

Hazardous materials

Littering etc.

Oil spill prevention

Research and monitoring

Shipping and boating

Stormwater management

Strategies and programs

Wastewater management


Drainage basin

Implementation of new automatized coagulation system

Actor: AS Tallinna Vesi   ●   Year: 2015   ●   Address: Ädala 10, Tallinn, Estonia

An automatized coagulation system in wastewater treatment plant enables optimizing of resources and increased control of treatment system.© AS Tallinna Vesi


AS Tallinna Vesi (producer of drinking water and treatment of wastewater in Tallinn) has installed a new automatized coagulation system in their wastewater treatment plant in 2015. The new system has sensors, which detect the concentration of phosphates after the wastewater leaves the aeration tanks and before it enters the secondary sedimentation tank. According to the results of the sensors and the flow rate, the dosing pump then releases a quantity of coagulant, which is efficient to meet the target concentration value of total phosphorous (Ptot).


The new system enables optimization of the dosage of the coagulant as the automatized system measures the concentration of phosphates after aeration tanks and responds by releasing sufficient amount of coagulant in order to meet the target vaue of Ptot.

The system enables AS Tallinna Vesi to detect sudden changes in the concentrations of Ptot in the wastewater on an ongoing basis. This is beneficial as it enables them to detect any unknown and unexpected pollution or a potential failure in one of the processes preceding coagulation. Thus, it is possible evaluate if there is a need to intensify the treatment processes before and / or after coagulation.

Overall, the new system is beneficial as it enables AS Tallinna Vesi to optimise the use of resources (e.g. coagulant) and to have better control over the concentration of Ptot in the outflow. Thus, the company is better prepared to ensure that the concentration of Ptot in the outflow remains stable and in accordance with our expectations and legal requirements.

Background information

The requirement for the concentration of Ptot in Estonia is 0,5 mg/l. Preceding the implementation of the new automatized coagulation system, the legally required Ptot concentration in the outflow was also being met by AS Tallinna Vesi. Yet, the system was implemented in order to increase the control over the wastewater treatment processes, which have a direct impact on the Baltic Sea.

© AS Tallinna Vesi











Further information

Name: Maris Neeme   ●  Email: maris.neeme ( at ) tvesi.ee   ●  Web page: www.tallinnavesi.ee