Sri Lanka, June 23 -- As of June 2026, health authorities identified 538 high-risk Grama Niladhari (GN) areas across 331 Medical Officer of Health (MOH) areas within 14 districts.

Colombo District

Battaramulla: Batapotha, Subuthipura, Thalangama North A, Walpola, Kalapaluwawa, Muththettugoda.

Boralesgamuwa: Werahera South, Katuwawala South, Boralasgamuwa East A, Neelammahara, Bodirajapura, Boralasgamuwa East B, Diulapitiya East.

Dehiwala: Kohuwala, D1, Karagampitiya, Nadimala.

Egodauyana: Idibadda East, Egodauyana South, Egodauyana North, Idibadda West, Moratumulla East, Willorawatta West.

Gothatuwa: Himbutana West, Mulleriyawa North, Gothatuwa New Town, Kotuwila, Balagama, Megoda Kolonnawa, Udumulla South Welewatta, Wennawatta, Kel...