Catchments
| Name | Type |
|---|---|
| Aldino/Aldein (021001) | administrative |
| Aldover (43006) | administrative |
| Aledo (30006) | administrative |
| Alegia (20005) | administrative |
| Alegría-Dulantzi (01001) | administrative |
| Aleixar, L' (43007) | administrative |
| Alella (08003) | administrative |
| Alentejo Central (PT187) | nuts |
| Alentejo Litoral (PT181) | nuts |
| Alentejo (PT18) | nuts |
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