FEHD Releases August Gravidtrap and Density Indexes for Aedes Albopictus in Hong Kong Survey Areas.

2026-09-08 19:15 Last Updated At：19:28

FEHD releases eighth batch of gravidtrap indexes for Aedes albopictus in August

The Food and Environmental Hygiene Department (FEHD) today (September 8) released the eighth batch of gravidtrap indexes and density indexes for Aedes albopictus in August, covering 10 survey areas, as follows:

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FEHD releases eighth batch of gravidtrap indexes for Aedes albopictus in August Source: HKSAR Government Press Releases

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FEHD releases eighth batch of gravidtrap indexes for Aedes albopictus in August Source: HKSAR Government Press Releases

District	Survey Area	August 2026
District	Survey Area	Area Gravidtrap Index	Area Density Index
Wan Chai	Happy Valley and Tai Hang	2.6%	1.3
Kowloon City	Kowloon City	2.8%	1.3
Mong Kok	Mong Kok and Tai Kok Tsui	1.7%	1.0
Wong Tai Sin	Wong Tai Sin West	2.0%	2.0
Yau Tsim	Tsim Sha Tsui East and King's Park	0.0%	N/A
Tai Po	Tai Po West	2.7%	1.0
Kwai Tsing	Tsing Yi South	5.2%	1.0
Tsuen Wan	Ma Wan and Sham Tseng	7.3%	1.0
Tuen Mun	So Kwun Wat	3.6%	1.0
Tuen Mun	Tuen Mun North	3.1%	1.0

During the rainy season, the FEHD continues to carry out a series of mosquito prevention and elimination measures, including:

interdepartmental collaboration: convening special meetings of the interdepartmental task forces on anti-mosquito work to co-ordinate relevant departments and stakeholders (such as construction site contractors, schools and property management companies) in strengthening mosquito control work at venues;

precise risk assessments: carrying out intensive and targeted mosquito control work at locations with more serious mosquito infestations, including stepping up inspections, eliminating mosquito breeding and potential breeding grounds, applying larvicides, conducting fogging operations to eradicate adult mosquitoes, and placing mosquito trapping devices at appropriate locations;

promotion and education: organising exhibitions with relevant departments and stakeholders, and distributing leaflets and posters to enhance public awareness of mosquito control and prevention; and

rapid alert mechanism: notifying residential estates that have subscribed to the gravidtrap Rapid Alert System, and advising property management companies and residents to stay vigilant and work together in taking mosquito prevention and elimination measures.

During the follow-up actions and following the discovery of stagnant water or stagnant water containers at a sports ground and a private housing estate in Kwai Tsing District and Tsuen Wan District, the FEHD has issued a total of two statutory notices to the responsible persons-in-charge, requiring the clearance of such items within a specified timeframe.

Public participation is crucial to the effective control of mosquito problems. The FEHD appeals to members of the public to continue to work together in strengthening personal mosquito control measures, including:

tidying up their premises and checking for any accumulation of water inside the premises;

removing all unnecessary water collections and eliminating the sources;

checking household items (those placed in outdoor and open areas in particular), such as refuse containers, vases, air conditioner drip trays, and laundry racks to prevent stagnant water;

changing water in flower vases and scrubbing their inner surfaces thoroughly, and removing water in saucers under potted plants at least once a week;

properly covering all containers that hold water to prevent mosquitoes from accessing the water;

properly disposing of articles that can contain water, such as disposable meal boxes and empty cans; and

scrubbing drains and surface sewers with alkaline detergent at least once a week to remove any mosquito eggs.

Starting in August 2025, following the completion of the surveillance of individual survey areas, and once the latest gravidtrap index and the density index are available, the FEHD has been disseminating relevant information through press releases, its website and social media. It aims to allow members of the public to quickly grasp the mosquito infestation situation and strengthen mosquito control efforts, thereby reducing the risk of chikungunya fever (CF) transmission.

Following recommendations from the World Health Organization and taking into account the local situation in Hong Kong, the FEHD sets up gravidtraps in districts where mosquito-borne diseases have been recorded in the past, as well as in densely populated places such as housing estates, hospitals and schools to monitor the breeding and distribution of Aedes albopictus mosquitoes, which can transmit CF and dengue fever. At present, the FEHD has set up gravidtraps in 62 survey areas of the community, with a surveillance period of two weeks. During the surveillance period, the FEHD will collect the gravidtraps once a week. After the first week of surveillance, the FEHD will immediately examine the glue boards inside the retrieved gravidtraps for the presence of adult Aedine mosquitoes to compile the Gravidtrap Index (First Phase) and Density Index (First Phase). At the end of the second week of surveillance, the FEHD will instantly check the glue boards for the presence of adult Aedine mosquitoes. Data from the two weeks of surveillance will be combined to obtain the Area Gravidtrap Index and the Area Density Index. The Gravidtrap and Density indexes for Aedes albopictus in different survey areas, as well as information on mosquito prevention and control measures, are available on the department's webpage(www.fehd.gov.hk/english/pestcontrol/dengue_fever/Dengue_Fever_Gravidtrap_Index_Update.html#).

Hong Kong Customs Seizes 25kg Ketamine and 13kg Cannabis, Arrests Three Passengers at Airport

Hong Kong Customs detects three drug trafficking cases involving incoming passengers at airport

Hong Kong Customs today (September 8) detected three drug trafficking cases involving passengers at Hong Kong International Airport and seized about 25 kilograms of suspected ketamine and about 13kg of suspected cannabis buds, with a total estimated market value of about 13 million. Three persons were arrested.

The first case involved a Mainland male passenger, aged 48, arrived in Hong Kong from Bangkok, Thailand, last night (September 7). During customs clearance, Customs officers found about 3kg of suspected cannabis buds, with an estimated market value of about $700,000 in his carry-on suitcase. The man was arrested in the early hours today.

In the second case, a 23-year-old Taiwan male passenger arrived in Hong Kong from Barcelona, Spain, today. During customs clearance, Customs officers found about 25kg of suspected ketamine, with an estimated market value of about $10 million inside his checked-in suitcase. The man was subsequently arrested.

In the third case, a 37-year-old Mainland female passenger arrived in Hong Kong from Bangkok, Thailand, via Manila, the Philippines, today. During customs clearance, Customs officers found about 10kg of suspected cannabis buds, with an estimated market value of about $2.3 million inside her checked-in suitcase. The woman was subsequently arrested.

The arrested men in the first two cases have each been charged with one count of trafficking in a dangerous drug. The arrested woman in the third case will be charged with one count of trafficking in a dangerous drug. The three cases will be brought up at the West Kowloon Magistrates' Courts tomorrow (September 9).

Customs will continue to step up enforcement against drug trafficking activities through intelligence analysis. The department also reminds members of the public to stay alert and not to participate in drug trafficking activities for monetary return. They must not accept hiring or delegation from another party to carry controlled items into and out of Hong Kong. They are also reminded not to carry unknown items for other people.

Customs will also continue to apply a risk assessment approach and focus on selecting passengers from high-risk regions for clearance to combat transnational drug trafficking activities.

Under the Dangerous Drugs Ordinance, trafficking in a dangerous drug is a serious offence. The maximum penalty upon conviction is a fine of $5 million and life imprisonment.

Members of the public may report any suspected drug trafficking activities to Customs' 24-hour hotline 182 8080 or its dedicated crime-reporting email account (crimereport@customs.gov.hk) or online form (eform.cefs.gov.hk/form/ced002).

FEHD Releases August Gravidtrap and Density Indexes for Aedes Albopictus in Hong Kong Survey Areas.

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