| Watershed number | line number of the outlet in the DEM | colon number of the outlet in the DEM | X geographical coordinate of the outlet (Lambert projection) | Y geographical coordinate of the outlet (Lambert projection) | Monodirectionnal watershed surface in hectares | Net Rainfal (NR) in 10^3 m^3 by year | Nitrogen budget (NB) in tons of N by year | River name |
| 1 | 689 | 623 | 201,875 | 2437,625 | 85069 | 347014 | 4396 | Trieux |
| 2 | 590 | 1059 | 310,875 | 2412,875 | 114625 | 311906 | 1430 | Couesnon |
| 3 | 535 | 940 | 281,125 | 2399,125 | 96106 | 244222 | 3117 | Rance |
| 4 | 462 | 285 | 117,375 | 2380,875 | 170912 | 963603 | 6299 | Aulne |
| 5 | 237 | 458 | 160,625 | 2324,625 | 98237 | 579734 | 2874 | Laïta (Ellé + Isole) |
| 6 | 235 | 531 | 178,875 | 2324,125 | 205469 | 892087 | 11099 | Blavet |
| 7 | 93 | 799 | 245,875 | 2288,625 | 1043262 | 2032632 | 25224 | Vilaine |