


Every day, we see millions of litres of polluted washwater flowing from construction sites straight into sinks and drains. That water carries PFAS “forever chemicals,” microplastics, paint, and fine solids, and most of it slips past treatment plants into our rivers and oceans.
It might look like a bucket rinse or a quick sink wash, but it adds up to a massive hidden problem that has gone unchecked for too long.
The Green Sink Initiative makes this hidden problem impossible to ignore by combining:
AWARENESS
We help the public and industry see the link between sinks, drains, and ocean pollution.
EDUCATION
We partner with the Chartered Institute of Building (CIOB) to deliver the first-ever global training course on construction wastewater and legislation, reaching 60,000 professionals in 100 countries.
SOLUTIONS
Washbox’s award-winning closed-loop mobile wash stations for construction and maintenance sectors, plus new products in development for DIY enthusiasts and households.
COMPLIANCE
We work with universities, policymakers, and industry bodies to make liquid waste mismanagement a thing of the past.

Our Clinton Global Initiative Commitment
Eliminate 50 million litres of construction washwater pollution over the next five years.
Train 100,000 construction professionals in sustainable liquid waste management.

Join the movement
Be part of the UN-backed Green Sink Initiative. register for our upcoming CIOB course, stay informed with our newsletter and help us spread the word and help protect our waterways by washing tools the right way!
LEARN MORE ABOUT THE ISSUE
Managing water use and liquid waste during construction
Our exclusive CPD for CIOB (Chartered Institute of Building) highlights the environmental risks of liquid waste from construction sites and explores practical, compliant solutions like closed-loop wash stations to protect waterways and improve site performance.



DISCOVER OUR SOLUTIONS
Sink better with Washbox.
Our closed-loop Washbox 500, Washbox 200 and the new Washbox Rocket recycle water, capture solids and eliminate liquid waste.

