| Commune | Code | Observation(s) | % des observations totales |
|---|---|---|---|
| Alluyes | 28005 | 1 | 1.4 |
| Bailleau-l'Évêque | 28022 | 1 | 1.4 |
| Barjouville | 28024 | 3 | 4.2 |
| Bonneval | 28051 | 3 | 4.2 |
| Châteaudun | 28088 | 2 | 2.8 |
| Commune nouvelle d'Arrou | 28012 | 2 | 2.8 |
| Dangeau | 28127 | 1 | 1.4 |
| Dreux | 28134 | 14 | 19.7 |
| Épernon | 28140 | 2 | 2.8 |
| Fessanvilliers-Mattanvilliers | 28151 | 1 | 1.4 |
| Flacey | 28153 | 1 | 1.4 |
| Fontaine-la-Guyon | 28154 | 1 | 1.4 |
| Gasville-Oisème | 28173 | 1 | 1.4 |
| Jallans | 28198 | 1 | 1.4 |
| Jouy | 28201 | 1 | 1.4 |
| La Bourdinière-Saint-Loup | 28048 | 1 | 1.4 |
| La Loupe | 28214 | 3 | 4.2 |
| Le Boullay-Thierry | 28055 | 1 | 1.4 |
| Lèves | 28209 | 12 | 16.9 |
| Luisant | 28220 | 1 | 1.4 |
| Mainvilliers | 28229 | 3 | 4.2 |
| Marboué | 28233 | 1 | 1.4 |
| Mignières | 28253 | 1 | 1.4 |
| Montreuil | 28267 | 1 | 1.4 |
| Morancez | 28269 | 1 | 1.4 |
| Saint-Denis-Lanneray | 28334 | 2 | 2.8 |
| Saint-Lubin-de-la-Haye | 28347 | 2 | 2.8 |
| Senantes | 28372 | 3 | 4.2 |
| Trizay-lès-Bonneval | 28396 | 1 | 1.4 |
| Vert-en-Drouais | 28405 | 1 | 1.4 |
| Vitray-en-Beauce | 28419 | 2 | 2.8 |