In response to concerns in Zeeland about the use of steel slag in the Zeeland waters, no steel slag will temporarily be applied in works of Rijkswaterstaat. This was promised by Secretary of State Aartsen following letters and discussions with Zeeland officials.
Last week, the Secretary of State spoke with Provincial Executive Dick van der Velde and Alderman Arno Witkam about the concerns that exist. The Secretary of State has indicated in a letter to the House of Representatives that he understands the concerns in Zeeland. In the letter, he states that a process has been initiated to see how these concerns can be addressed. It has been promised that until July 21, 2026, no steel slag will be physically applied in the Ooster-/Westerschelde on behalf of Rijkswaterstaat.
Rijkswaterstaat will also strive for additional safeguards for responsible application of steel slag in water. Besides looking into how the concerns can be addressed, RWS will ensure extra care in the event that steel slag is applied after July 21.
Using Time for Discussion and Research
Extensive research has already been conducted on the effects of steel slag in large surface waters, based on which no negative effects are expected. Moreover, there is currently a broad study underway commissioned by LVVN and NVWA into the cause of the decline of shellfish and shellfish in the Oosterschelde. The Zeeland authorities wish for independent, scientific research into the (long-term) effects of steel slag on public health, the soil and water system, biodiversity and food safety. Since 2023, the Province of Zeeland has urged action from the ministry with several letters.
