Water Natuurlijk ( or 'Water Of Course') is a political party in the Netherlands that focuses exclusively on water board politics. The party received the highest number of votes in the 2008, 2015 and 2019 water board elections.
| Aa en Maas | 6 | 6 | 7 | 8 | |
| Amstel, Gooi en Vecht | 5 | 4 | 4 | 4 | |
| Brabantse Delta | 4 | 3 | 2 | 3 | |
| Delfland | 4 | 3 | 3 | 4 | |
| De Dommel | 6 | 6 | 8 | 7 | |
| De Stichtse Rijnlanden | 6 | 6 | 7 | 6 | |
| Drents Overijsselse Delta | Groot Salland | 6 | 5 | 5 | 5 |
| Reest en Wieden | 3 | 2 | |||
| Fryslân | 3 | 3 | 3 | 4 | |
| Hollandse Delta | 3 | 2 | 1 | 2 | |
| Hollands Noorderkwartier | 4 | 4 | 3 | 2 | |
| Hunze en Aa's | 4 | 4 | 5 | 5 | |
| Limburg | Peel en Maasvallei | 3 | 3 | 3 | 3 |
| Roer en Overmaas | 3 | 3 | |||
| Noorderzijlvest | 4 | 4 | 5 | 6 | |
| Rijnland | 4 | 3 | 3 | 4 | |
| Rijn en IJssel | 4 | 5 | 5 | 5 | |
| Rivierenland | 3 | 3 | 4 | 5 | |
| Scheldestromen | Zeeuwse Eilanden | 3 | 2 | 2 | 2 |
| Zeeuws-Vlaanderen | 2 | ||||
| Schieland en de Krimpenerwaard | 4 | 4 | 6 | 6 | |
| Vallei en Veluwe | Vallei en Eem | 5 | 3 | 3 | 3 |
| Veluwe | 3 | ||||
| Vechtstromen | Regge en Dinkel | — | — | 6 | 7 |
| Velt en Vecht | 3 | ||||
| Zuiderzeeland | — | 6Represented by affiliate party Water, Wonen en Natuur | 6 | 6 | |
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