30804 is the Postal Code/ZIP Code for the District of Patio de Agua in the Costa Rica Province of Cartago and the Canton of El Guarco.
| Postal Code | 30804 |
| Postal Code Name | Patio de Agua |
| Province | Cartago Province |
| Canton | El Guarco Canton |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 10308 30107 30802 30803 |