| Commune | Code | Observation(s) | % des observations totales |
|---|---|---|---|
| Amilly | 28006 | 1 | 1.6 |
| Arcisses | 28236 | 1 | 1.6 |
| Barjouville | 28024 | 10 | 16.4 |
| Bouville | 28057 | 2 | 3.3 |
| Brezolles | 28059 | 1 | 1.6 |
| Brou | 28061 | 1 | 1.6 |
| Chartres | 28085 | 1 | 1.6 |
| Châteaudun | 28088 | 2 | 3.3 |
| Cloyes les Trois Rivières | 28103 | 4 | 6.6 |
| Courbehaye | 28114 | 2 | 3.3 |
| Dampierre-sous-Brou | 28123 | 1 | 1.6 |
| Dancy | 28126 | 1 | 1.6 |
| Dreux | 28134 | 6 | 9.8 |
| Flacey | 28153 | 1 | 1.6 |
| Fontenay-sur-Conie | 28157 | 1 | 1.6 |
| Fontenay-sur-Eure | 28158 | 4 | 6.6 |
| Fresnay-l'Évêque | 28164 | 1 | 1.6 |
| Gasville-Oisème | 28173 | 4 | 6.6 |
| Janville-en-Beauce | 28199 | 1 | 1.6 |
| La Bourdinière-Saint-Loup | 28048 | 1 | 1.6 |
| La Chapelle-du-Noyer | 28075 | 1 | 1.6 |
| Lèves | 28209 | 2 | 3.3 |
| Logron | 28211 | 1 | 1.6 |
| Luisant | 28220 | 3 | 4.9 |
| Maintenon | 28227 | 1 | 1.6 |
| Mainvilliers | 28229 | 1 | 1.6 |
| Mignières | 28253 | 3 | 4.9 |
| Montboissier | 28259 | 1 | 1.6 |
| Moriers | 28270 | 1 | 1.6 |
| Nogent-le-Rotrou | 28280 | 1 | 1.6 |
| Nogent-sur-Eure | 28281 | 1 | 1.6 |
| Poinville | 28300 | 1 | 1.6 |
| Revercourt | 28315 | 1 | 1.6 |
| Saint-Denis-Lanneray | 28334 | 2 | 3.3 |
| Saint-Lubin-de-la-Haye | 28347 | 1 | 1.6 |
| Santilly | 28367 | 1 | 1.6 |
| Senantes | 28372 | 3 | 4.9 |
| Varize | 28400 | 2 | 3.3 |
| Villemaury | 28330 | 1 | 1.6 |
| Vitray-en-Beauce | 28419 | 2 | 3.3 |