| length (km) | river | % Correct |
|---|---|---|
| 1047 | Wisła | 99%
|
| 742 | Odra | 97%
|
| 808 | Warta | 90%
|
| 587 | Bug | 86%
|
| 443 | San | 68%
|
| 448 | Narew | 61%
|
| 388 | Noteć | 53%
|
| 303 | Wieprz | 52%
|
| 247 | Dunajec | 51%
|
| 198 | Nysa Łużycka | 45%
|
| 319 | Pilica | 41%
|
| 205 | Wisłok | 40%
|
| 270 | Bóbr | 35%
|
| 238 | Brda | 35%
|
| 182 | Nysa Kłodzka | 34%
|
| 155 | Biebrza | 33%
|
| 164 | Wisłoka | 28%
|
| 198 | Wda | 26%
|
| 166 | Bzura | 24%
|
| 207 | Drwęca | 24%
|
| 249 | Wkra | 24%
|
| 190 | Łyna | 20%
|
| 145 | Gwda | 17%
|
| 164 | Obra | 17%
|
| 217 | Prosna | 17%
|
| 186 | Drawa | 16%
|
| 151 | Nida | 16%
|
| 169 | Pasłęka | 13%
|
| 168 | Rega | 12%
|
| 157 | Lega | 9%
|