Paraffin washed ashore on the beaches in Noord-Holland and Zuid-Holland over the past days. The beaches will be cleaned up over the weekend, NOS reports.
Sunbathers can visit the beaches as usual, according to Rijkswaterstaat.
The paraffin washed ashore from Noordwijk to Zandvoort and from IJmuiden to Den Helder. It can only be cleaned up at low tide.