On top of those broader measures listed and the general level of public cleaning/maintenance, there’s reporting of every dengue infection diagnosed along with the individual’s home address and particulars to the National Environmental Agency. Cases and trends are monitored for developing clusters, publicly publishing up-to-date findings and exact numbers. Where a cluster is found, they do additional anti-mosquito fogging and significantly increase the local public awareness campaign (huge banners, posters in every elevator, distribute leaflets, etc).
They then send agents unannounced to inspect inside every home/unit in the area for any potential breeding grounds. Everything is checked from potted plant trays to dish drying racks to toilet bowl scrubber holders. If any breeding is found, there’s fines in the thousands of dollars. The agents are empowered to enter without a warrant; it’s taken THAT seriously.
The NEA also monitors and takes appropriate action against non-residential areas like construction sites, where standing water is hard to eliminate unless it’s a priority.