Stockholm Junior Water Prize is the world’s most prestigious youth award given to a high school student for water research. 

In Australia, the Australian Water Association organises the national competition, with support from Xylem.

The winner of the Australian competition is invited to participate in the international competition held each year during World Water Week in Stockholm, Sweden, competing with over 30 countries in the international final.  

The 2021 Competition is now open for entries and we've updated the award submission process to give students the opportunity to seek some technical support or expertise from water industry professionals to help with their project. Check out the new process outlined in the Guidelines & Information kit below.

Key dates for the 2021 competition 

Monday, 15 February 2021: Completed project due.
Week of 15 March 2021: Shortlisted students present 10-minute presentation to judging panel on their submitted project via video conference.
Early April 2021: Top four students to present their projects to Australian Water Association members and water industry professionals with an announcement of the winner live via webinar.
Tuesday, 4 May 2021: Winner presented with award at Ozwater’21 in Adelaide.
Late August 2021: SJWP Ceremony held during World Water Week in Stockholm.

Enter the 2021 Competition

Submit your completed project

Meet our Australian Stockholm Junior Water Prize Winner for 2020

CRACK for the FUTURE: The use of eggshell waste as a bio-adsorbant of phosphates for water and soil quality
Emma Serisier, Bishop Druitt College
Phosphate run-off into natural waterways from agricultural fertilisers and animal manures can cause eutrophication. Agricultural operations are large consumers of non-renewable fertilisers and large producers of biowaste materials. These issues come at great economic and environmental cost. This study’s aim was to offset these issues by identifying eggshell as a potential biowaste adsorbent, examining its effectiveness in decreasing the orthophosphate concentration in aqueous solutions, and its direct application to run-off areas as adsorbents and soil conditioners.
Eggshell was selected based on its abundance, availability, cost, renewability and biodegradable properties. Tests conducted in simulated superphosphate run-off rainwater over 24 hours, indicated that eggshell decreased orthophosphate levels by 62% on average. Testing on eggshell waste, at 6 hourly intervals and in manure/rainwater run-off simulation, showed average orthophosphate reductions of 59% and 55%, indicating effective adsorption. Costs and benefits were investigated comparing the use of eggshell waste for the dual purpose of phosphate adsorption and soil conditioning. A mathematical model and website ( was developed to calculate cost savings and application rates of eggshell. History has shown that global change is achieved through action on a local scale. The website provides farmers with a free, accessible tool to help counteract their environmental footprint and create global change. This study concluded that the economic and environmental benefits of agricultural use of biowaste products, such as eggshell, as an adsorbent and soil conditioner, appear to have been undervalued and underutilised.

Watch Emma's Video Pitch 

View Emma's written project

View the 2020 International Finalist Catalogue

Meet our Internation Stockholm Junior Water Prize 2019 Winner & Australian Stockholm Junior Water Prize Winner 2019

The SODIS Sticker: Development and testing of a Film based detector system for appropriate Ultraviolet Solar Disinfection (SODIS) of Water
Macinley Butson, The Illawarra Grammar School
Macinley has developed the SODIS sticker, an innovative ultraviolet radiation sticker which accurately measures the solar UV exposure required to sanitise drinking water. This is done through a high accuracy transparent UV-sensitive film coupled with a partially UV blocking filter, which allows the SODIS sticker to measure direct UV exposure from the sun and reflected UV from other objects. At just over one cent to produce, it is also a cost-effective and safe way of purifying drinking water for developing communities

Following Macinley winning the Australian Stockholm Junior Water Prize in May 2019, she went on to take home the International Stockholm Junior Water Prize in August 2019. The Prize was presented to Macinley by HRH Crown Princess Victoria of Sweden. Read more here about Macinley's win in Stockholm

View our 2020 Finalist Video Pitches


Click here for more inspiration and to see all the international student projects.  

Check out our previous winners

Why enter the competition?

Our 2017 and 2019 Australian Stockholm Junior Water Prize winner, Macinley Butson spoke to us about what a great opportunity this competition is for students with a passion for STEM. Check out the video to find out for yourself!