| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Água Santa, Água Santa | 99965-000 |
| Postal/ZIP Codes in Engenho Grande, Água Santa | 99967-000 |
| Postal/ZIP Codes in Santo Antonio dos Pinheirinhos, Água Santa | 99968-000 |
| Postal/ZIP Codes in São Caetano, Água Santa | 99969-000 |