News

As of Jan. 1, 2026, businesses and group homes are subject to a discharge ban on small ditches and waterways.

The emphasis in 2026 is on setting clear priorities and using available resources more effectively.

How do we keep North Holland safe as sea levels rise? We are brooding on that question and improving the coast to find the answer.

The gentlemen from The Dutch Historian will give a historical lecture on the 1799 invasion and reclamation of the Wieringermeer on December 11.

We are participating in the regional crisis exercise 'Cloudburst'. We are practicing with crisis teams in the office and in practice.

We have signed an agreement with Verdygo regarding a modular design and construction system for sewage treatment plants.

With the new exhibition Killer Breach, photographer Loek Buter zooms in on 11 old dike breaches.

How do you best manage a ditch for both plants and animals? FLORON, RAVON and De Vlinderstichting wrote a handy field guide.

Over 70 students from grades 6 and 7 made a water journal on the dike in Hoorn in recent weeks. The reason is the dike reinforcement near Hoorn.

Starting in 2026, all wastewater from businesses must be offered through a municipal sewer.

It is important that there is no runoff to surface water when using plant protection products.

On Monday, October 20, the fall inspection begins. Our surveyors will check that the ditches in our area are well maintained.

HHNK and Waterproef stop measuring dinoterb.After new investigations, HHNK concludes that there is no dinoterb in the surface water.

After several sunny, dry days, the precipitation deficit in the Netherlands has increased further. In Hollands Noorderkwartier , there is a precipitation deficit of 225 mm.

2025 is the year of Leeghwater! He came into the world exactly 450 years ago. This special webexpo tells more about his life and work.