| Region | Number of departments | Number of municipalities | Number of villages | Number surveyed | Study villages |
| Zinder | 4 | 5 | 5 | 103 | Angoual Manda, Hamdaraoua, Guidimouni, Gassafa, Doungou |
| Dosso | 3 | 4 | 8 | 100 | Baléri Tounga, Bengou, Pangou, Liguido, Tsamia, Dioundiou, Gaya, Kouka, Bakoye |
| Tahoua | 3 | 8 | 8 | 103 | Bazaga, Cerasa, Mozagué, Massallata, Iskita, Nakoni, Téké, Zourdi |
| Maradi | 2 | 3 | 7 | 102 | Djirataoua, Keguel, Dan Koussou, Kabobi, Kormazaoua, Bargaja, Dodori |
| Total | 12 | 20 | 28 | 408 |
|