“Sink Better”.
Join the Green Sink Initiative 

What if the humble sink could help save the ocean?
That’s the idea behind the Green Sink Initiative, launched at Climate Week 2025 by cleantech company Washbox.

The campaign shines a light on an invisible but enormous problem:
the millions of litres of polluted washwater from construction sites that end up in drains every single day, carrying PFAS “forever chemicals,” plastics, and fine solids straight into rivers and oceans. It’s not a headline-grabbing issue. Yet it’s everywhere. And until now, it’s gone unchecked.

Four Pillars of Action The Green Sink Initiative makes this hidden problem impossible to ignore by combining:
• Awareness | showing the link between sinks, drains, and ocean pollution.
• Education | partnering 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 “Green Sink” wash stations for construction and maintenance, with new products in development for DIY enthusiasts and households.
• Compliance | working with universities, policymakers, and industry bodies to make liquid waste mismanagement a thing of the past.

“Pollution from construction washwater doesn’t just vanish down the drain — it flows to the ocean,”
said Andrew Crimston, Founder of Washbox.

“With the Green Sink Initiative, we’re making it easy for everyone, from contractors to DIYers, to do the right thing. Because when a better way exists, people change.”

A Clinton Global Initiative Commitment At Climate Week, Washbox also announced its 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.

A UN Ocean Decade Project The Initiative is recognised as part of the United Nations Ocean Decade, supported by UNESCO’s Intergovernmental Oceanographic Commission, and backed by research partnerships with Western Sydney and Deakin Universities.

Why a Sink? Because wastewater treatment plants don’t stop this type of pollution. What goes down the drain almost always makes its way to the ocean. By rethinking something as small as a sink, Washbox is helping protect something as vast as the sea.