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Logo Noorderzijlvest Water Authority
Logo Noorderzijlvest Water Authority

Treated water

We all use water. The water authority this water again. This amounts to 55 billion liters of water per year.  

Used water treat

How treat used water? The water authority the water again. This involves 55 million m³ of water per year. That is 55 billion liters.

Sludge processing

How do we process sludge? After treat we are left with sewage sludge. In a sludge digestion plant, organic substances that are still present in the sludge are broken down.

Sewage and rainwater

In cities and towns, rainwater ends up in the municipal sewer system. The rainwater is transported via a combined or separate sewer system to a sewage treatment plant.