The classification of housing units by type of solid waste disposal is according to the following guidelines:
1. Solid waste collected on a regular basis by authorized collectors.
2. Solid waste collected on an irregular basis by authorized collectors.
3. Solid waste collected by self-appointed collectors.
4. Occupants dispose of solid waste in a local dump supervised by authorities.
5. Occupants dispose of solid waste in a local dump not supervised by authorities.
6. Occupants burn solid waste.
7. Occupants bury solid waste.
8. Occupants dispose solid waste into river, sea, creek, pond.
9. Occupants compost solid waste.
10. Other arrangement.