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, Kelanimulla, Mahabuthgamuwa C, Rajasinghegama, Kotikawaththa East.

• Hanwella: Puwakpitiya South, Egodagama, Kiriwandala North, Mawathagama West, Thunnana East.

• Homagama: Katuwana, Pitipana North, Galawilawaththa North, Homagama South, Pitipana South, Henawatta, Jalthara, Mawathgama, Panagoda East.

• Kaduwela: Malabe, Thalahena, Hewagama, Athurugiriya, Korathota, Hokandara South, Oruwala, Bomiriya.

• Kahathuduwa: Hiripitiya, Niyadagala, Mattegoda, Brahmanagama, Kiriwaththuduwa, Kahathuduwa North, Polgasowita.

• Kesbewa: Honnanthara South, Madapatha, Makandana East, Makandana West.

• Maharagama: Kottawa South, Makumbura North, Godigamuwa North, Kottawa Town, Godigamuwa South B, Godigamuwa South A, Depanama, Kottawa West, Waththegedara, Nawinna, Dabahena, Maharagama Town, Rukmale West, Kottawa North, Makumbura South.

• Kolonnawa: Orugodawaththa, Salamulla, Sedawatta.

• Moratuwa: Borupana, Thelawala North, Molpe, Rawatawatta West, Angulana North, Lakshapathiya South, Thelawala South, Katubadda, Lakshapathiya North, Rawatawatta East.

• Padukka: Padukka, Galagedara South.

• Nugegoda: Nugegoda, Obesekarapura, Gangodawila North, Gangodawila South, Nugegoda West, Welikada East, Welikada North.

• Piliyandala: Palanwatta East, Thumbowila South, Makuluduwa, Palanwatta North, Bokundara, Gorakapitiya, Arawwala East, Arawwala West, Mampe North, Paligedara.

• Pitakotte: Madiwela, Pitakotte.

• Ratmalana: Kadawala, Ratmalana East, Aththidiya North, Badowita, Mountlavinia, Welikanda.

• CMC: Mattakkuliya/Sammanthranapura, Modara, Mahawatta/Madampitiya, Aluthmawatha, Lunupokuna, Bloemendhal, Kotahena East, Kotahena West, Kochchikade North, Ginthupitiya, Masangasweediya, New Bazaar, Grandpass North/Nawagampura, Grandpass South/Keththarama, Aluthkade East, Aluthkade West, Keselwatta, Kochchikade South, Fort, Maligawatta East, Salve Island, Wekanda, Hunupitiya, Suduwella/Ibbanwala, Panchikawatta, Maradana, Maligakanda, Maligawatta West, Kollupitiya/Galle Face, Dematagoda, Wanathamulla, Kuppiyawatta East, Kuppiyawatta West, Borella North, Borella South, Cinnoman Garden, Narahenpita/Gothamipura, Thimbirigasyaya, Kirula, Kirulapona, Pamankada East, Bambalapitiya, Milagiriya, Havelock Town, Wellawatta North, Pamankada West, Wellawatta South.

Gampaha District

• Attanagalla: Kalagedihena, Sapugasthenna, Pahala Thihariya, Thihariya East, Thihariyagama, Magalegoda, Wataddara West, Hiripitiya North, Hiripitiya Central.

• Seeduwa: Mukalangamuwa east, Liyanagemulla south, Kurana katunayake n, Awariwatta, Heenatiyana west.

• Kelaniya: Eriyawetiya, Pattiya east, Wedamulla, Hibatuwelgoda, Warakanatta, Hunupitiya east, Nahena.

• Ragama: Podiveekubura, Peralanda, Ragama, Tewaththa.

• Minuwangoda: Dobawala, Japalawatha, Meda Yatiyana, Weliya, Polwatha.

• Negombo: Wellaweediya East, North munnakkaraya.

• Biyagama: Biyagama W, Biyagama N, Siyambalape S, Gonawala Madyama, Heyyanthuduwa E, Heyyanthuduwa W, Walgama W, Walgama E, Malwana, Makola N Pahala.

• Wattala: Welikadamulla, Kerawalapitiya, Hekitha, Palliyawatta N, Balagalla.

• Katana: K C de silwa puraya, Kadirana south, Mahahunupitiya west.

• Dompe: Narampola, Kalukodayawa west, Dekatana, Halummahara, Kibulwilawaththa, Morahena, Pahala Mapitigama, Palahala, Indolamulla.

• Ja Ela: Kapuwaththa, Indivitiya, Dandugama, Hapugoda East, Uswaththa.

• Mahara: Gongithota, Pinnameda, Nathuduwa, Kirikiththa/North, Sooriyapaluwa / South.

• Divulapitiya: Sayakkaramulla, Hapuwalana, Pinnakalewatta, Thotillagahawatta, Dagonna.

• Gampaha: Weliweriya North, Weliweriya West, Yakkala North, G.Aluthgama North, Parakandeniya North, G.Aluthgama East, Pasyala.

• Mirigama: Pasyala, Loluwagoda, Raddalgoda, Webadamulla, Walawwatta.

Kalutara District

• Bandaragama: Atulugama East, Epitamulla.

• Horana: Horana North, Horana South, Munagama West, Halthotiyawatta, Midellamulahena, Dambara, Meewanapalana, Narthanagala, Munagama East.

• Ingiriya: Rathmalgoda East, Wagawaththa, Nimalagama.

• Matugama: Katugahahena.

• Panadura: Gorakana South, Miriyawatta.

• Wadduwa: Pinwaththa, Wadduwa west.

• NIHS (Kalutara & Payagala): Pulartan, Rajawatta Aluth kotasa, Nagoda west, Kudaheenatiyangala, Bombuwala North West, Payagala North, Halkandawila, Munhena, China Fort, Mahimulla.

Galle District

• MOH Galle: Dangedara north, Madapathala, Sangamiththa pura, Makuluwa, Magalle, Dewata, Kandawatta, Thalapitiya.

• MOH Thawalama: Weerapana south, Weerapana north, Weerapana west, Weerapana East, Opatha south, Opatha west, Opatha east, Thalangalla East, Malhathawa.

• MOH Bope Poddala: Kuruwattha 2, Walipitimodara, Uluvitike, Godakanda.

•          MOH Habaraduwa: Ahangama, Habaraduwa, Thalpe, Unawatuna.

•          Baddegama: Ginimallagaha west, Wanduramba, Baddegama.

•          Karandeniya: Uragasmandiya.

•          Elpitiya: Elpitiya, Kurudugaha, Omantha, Pituwala, Kahaduwa.

Matara District

• Matara MC: Hittetiya Central, Welegoda East, Walpala, Weliweriya East, Walgama North, Uyanwatta South, Isadeen Town, Uyanwatta North, Walgama Meda, Polhena, Welegoda West, Noope.

• Weligama: Maha Weediya, Kohonugamuwa, Hetti Weediya, Aluth Weediya.

• Devinuwara: Devinuwara Nugegoda, Devinuwara North, Kapugama Central.

•  Akuressa: Imbulgoda, Poramba, Henegama West, Akuressa, Minipegoda.

Hambantota District

• Tangalle: Pallikudawa urban, Kudawella south, Kudawella West, Kudawella east.

• Katuwana: Middeniya West, Murugasyaya West, Andulugoda.

• Walasmualla: Walasmulla West.

Kandy District

• MOH-Galagedara: Haddapitiya.

• MOH-Gampola (Udapalatha): Aregoda, Illangawaththa, Kahatapitiya, Amunupura.

• MOH-Gangawata Korale: Wewathenna, Ulpathakumbura, Pahala Eriyagama, Ampitiya Pallegama, Thennekumbura, Mahakanda, Heeressagala.

• MOH-Kandy MC: Bahirawa Kanda, Getambe, Welata, Katukele, Katukele West, Nittawela, Bowala, Deiyannewela, Buwelikada, Nagastenna, Suduhumpola West, Mulgampola, Ampitiya North, Poorna Watta East, Watapuluwa, Asgiriya, Suduhumpola East, Aruppola West, Mapanawathura, Thalwatta.

• MOH-Kundasale: Kundasale Nort, Kengalla.

• MOH-Kurunduwaththa: Udagama.

• MOH-Menikhinna: Sirimalwatta East, Hurikaduwa South.

• MOH-Pasbage: Nawalapitiya North, Nawalapitiya West.

• MOH-Udunuwara: Meewathura, Gangoda North.

• MOH-Werellagama: Gohagoda, Ranawana West.

• MOH Yatinuwara: Uda Eriyagama East, Kendakaduwa, Ambilmeegama South, Walgowwagoda, Pilapitiya, Gannoruwa East, Gannoruwa Central.

Matale District

• MC Matale: Diyabubula, Kaludewala, Kohobiliwela, Gongawela, Aluvihare.

• Matale: Kotuwegedara, Dikkiriya, Parawaththa, Palapathwala, Dumkolawaththa, Makulugaharuppa, Sappuwaththa, Matale Waththa, Madawala Ulpatha, Kawataymuna, Iriyagolla, Galwadukumbura, Walawewa.

• Rattota: Viharagama, Ulpatha pitiya, Kuruwawa, Kaikawala, Pallegama, Bandarapola, Galekotuwa, Lonvil, Ihala Owala.

• Ukuwela: Meedeniya, Warakamura, Ukuwela, Wariyapola, Wariyapola Waththa, Paragahawela, Marukona, Nugagahathenna, Warakanda waththa, Purijjala, Kohobiliwela.

Ratnapura District

• Ratnapura (MOH & PS): Weralupa, Town north, Mudduwa, Muwagama, Dewalaya gawa, Malangama, Malwala, Kahangama, Gallella.

• Kalawana MOH: Wewelkandura, Jathuwangoda, Dawgalagama, Hapugoda, Rambuka.

• Embilipitiya: Pallegama, Newtown, Kumbagodaara, Panamura, Thunkama, Muadiyawala.

• Kuruwita: Kithulpe, Theppanawa, Kahengama, Kuruwita.

• Nivithigala MOH: Uda Karawita, Pahala Karawita, Horangala, Horanekarakanda, Yakdehiwatta.

• Ayagama MOH: Dumbara, Udugala, Sinhalagoda.

• Pelmadulla MOH: Lellopitiya, Sannasgama, Berenduwa, Alupotha, Dewalegama.

Kegalle District

• Mawanella: Hinguloya, Hingula.

• Yatiyanthota: Ganepalla, Welihelathenna.

• Ruwanwella: Morawaththa, Doranuwa.

• Dehiovita: Vaharaka, Wendala, Pahala Thalduwa, Atulugama, Napawala.

• Warakapola: Ambepussa, Thulhiriya, Menikkadawara, Nelundeniya.

Kurunegala District

•  Pannala: Nalawalana, Panwilakumbura, Welpalla.

• Kuliyapitiya: Kuliyapitiya.

• Mallawapitiya: Mallawapitiya.

• Udubaddawa: Dummalasooriya.

• Kurunegala & MC Kurunegala: Bandaranayakapura, Kurunegala East, Kurunegala West, Kurunegala South.

• Polgahawela: Bandawa, Denagamuwa, Wellawa.

Puttalam District

• Madampe: Mahabaddegama, Galahitiyawa, Egodayagama, Karukkuwa, Arakkalagama, Nelumpokuna, Walahena, Thambaglla, Madagama, Pahala weerakodiyana, Manakkuluma, Pambala.

Badulla District

• Badulla: Badulla west, Badulla central, Pitawelagama, Badulla north, Katupelellagama, Kailagoda.

• Haliela MOH: Deamatawelhinna, Imbulgoda, Kandana, Godegama, Medapitigama.

• Welimada MOH: Alugolla, Welimada town, Galedanda, Koskanuwela.

• Uvaparanagama MOH: Downside, Unapana, Perawella, Umaela, Alagolla.

• MOH Passara: Nikebedda, Gonagala west, Kahataruppa, Palgahathenna.

Batticaloa District

•          Batticaloa: Kolinjadiya East, Kolinjadiya Meda, Kolinjadiya West, Uhitiyawa, Kalladi velur, Kalladi, Koolavadi.

•          Kiran: Santhiveli, Kiran east.