Netherlands Browse regions with water & wastewater management location pages. Drenthe 9 cities Flevoland 6 cities Fryslân 15 cities Gelderland 47 cities Groningen 13 cities Limburg 28 cities Noord-Brabant 67 cities Noord-Holland 52 cities Overijssel 24 cities Utrecht 30 cities Zeeland 9 cities Zuid-Holland 64 cities