MOSQUITO INDEX
Hong Kong Mosquito Index Tracker: Where Does Your Area Rank This Month?
Quick answer
Every month, the Food and Environmental Hygiene Department (FEHD) publishes an Aedes albopictus gravidtrap index (a monthly-consolidated figure) for 62 survey areas across Hong Kong. The highest reading for June 2026 was Lam Tin & Sau Mau Ping at 40.2% — Level IV (≥40%, meaning the mosquito is very widely distributed, the highest tier) — followed by Cheung Sha Wan at 29.2% (Level III). Every other survey area came in below 20%. The table below tracks all 62 areas month by month, sourced directly from FEHD's published figures.
What does the index actually measure?
The gravidtrap index measures how widely distributed Aedes albopictus (the Asian tiger mosquito) is within a survey area — it is not a mosquito headcount, and it is not a disease-risk assessment. FEHD groups the index into four levels:
| Level | Index range | What it means |
|---|---|---|
| Level I (green) | Below 5.0% | Not widely distributed |
| Level II (yellow) | 5.0% to below 20.0% | Fairly widely distributed |
| Level III (red) | 20.0% to below 40.0% | Widely distributed |
| Level IV (purple) | 40.0% or above | Very widely distributed |
Monthly-consolidated vs fortnightly-batch figures: This table shows FEHD's monthly-consolidated index (the whole month combined). During mosquito season FEHD separately publishes fortnightly batches of the latest figures, and the two sets of numbers can differ sharply — for example, Lam Tin & Sau Mau Ping's June monthly-consolidated figure was 40.2%, but by the last fortnightly batch of June it had already dropped back below 10%. Know which set of numbers you're looking at.
All 62 survey areas, month by month (2026)
| District | Survey area | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|---|
| Kwun Tong | Lam Tin and Sau Mau Ping | 0.0 | 0.0 | 0.8 | 9.4 | 27.7 | 40.2 |
| Sham Shui Po | Cheung Sha Wan | 0.0 | 0.0 | 0.9 | 8.5 | 25.7 | 29.2 |
| Sha Tin | Ma On Shan | 0.0 | 0.0 | 1.6 | 16.4 | 31.0 | 18.5 |
| North | Fanling South | 0.0 | 0.0 | 0.0 | 8.4 | 14.9 | 18.2 |
| Yuen Long | Tin Shui Wai | 0.0 | 0.0 | 1.0 | 6.1 | 13.0 | 17.2 |
| Eastern | Chai Wan | 0.0 | 0.0 | 0.8 | 7.3 | 15.4 | 16.9 |
| Tai Po | Tai Po West | 0.0 | 0.0 | 0.0 | 7.0 | 16.4 | 16.8 |
| Kwai Tsing | Kwai Chung West | 0.0 | 0.0 | 0.0 | 4.5 | 17.8 | 16.7 |
| Wong Tai Sin | Diamond Hill and Tsz Wan Shan | 0.0 | 0.0 | 0.8 | 8.4 | 16.7 | 15.8 |
| Wong Tai Sin | Wong Tai Sin East | 0.0 | 0.0 | 0.0 | 9.8 | 16.7 | 15.8 |
| Eastern | Shau Kei Wan and Sai Wan Ho | 0.9 | 0.0 | 0.0 | 12.6 | 17.0 | 14.3 |
| Kwun Tong | Kwun Tong Central | 0.0 | 0.0 | 0.0 | 2.4 | 37.3 | 14.1 |
| Kowloon City | Ho Man Tin | 0.0 | 0.0 | 0.9 | 5.3 | 23.6 | 14.0 |
| Southern | Pokfulam | 0.0 | 0.0 | 0.0 | 4.3 | 15.2 | 13.3 |
| Sai Kung | Tseung Kwan O North | 0.0 | 0.0 | 1.1 | 13.6 | 35.3 | 12.9 |
| Sai Kung | Sai Kung Town | 0.0 | 0.0 | 5.7 | 16.8 | 22.1 | 11.3 |
| Wong Tai Sin | Ngau Chi Wan and San Po Kong | 0.0 | 0.0 | 0.0 | 17.8 | 14.7 | 11.1 |
| Sha Tin | Sha Tin Town Centre and Fo Tan | 0.0 | 0.0 | 0.0 | 9.3 | 18.3 | 11.0 |
| Kowloon City | Kowloon Tong | 0.0 | 1.7 | 2.5 | 8.5 | 23.4 | 10.8 |
| Kwun Tong | Yau Tong and Cha Kwo Ling | 0.0 | 0.0 | 0.0 | 0.9 | 16.2 | 10.3 |
| North | Sheung Shui | 0.8 | 0.0 | 0.0 | 20.3 | 29.3 | 10.0 |
| Eastern | North Point and Quarry Bay | 0.0 | 0.0 | 0.0 | 6.8 | 18.9 | 9.9 |
| Tsuen Wan | Ma Wan and Sham Tseng | 0.9 | 0.0 | 0.9 | 4.6 | 26.2 | 9.5 |
| Kowloon City | Kai Tak | 0.0 | 0.0 | 1.0 | 10.6 | 12.8 | 9.4 |
| Islands | Cheung Chau | 0.0 | 0.0 | 0.9 | 7.3 | 12.0 | 9.3 |
| Southern | Aberdeen and Ap Lei Chau | 0.0 | 0.0 | 0.9 | 6.5 | 20.8 | 9.2 |
| Sha Tin | Sha Tin East | 0.0 | 0.0 | 0.8 | 4.1 | 19.0 | 8.9 |
| Central and Western | Sheung Wan and Sai Ying Pun | 0.0 | 0.0 | 1.8 | 3.5 | 20.5 | 8.8 |
| Kwun Tong | Kowloon Bay | 0.0 | 0.0 | 0.0 | 9.8 | 28.9 | 8.8 |
| Kwai Tsing | Lai King | 0.0 | 0.0 | 1.0 | 6.6 | 26.9 | 8.7 |
| Tsuen Wan | Tsuen Wan Town | 0.0 | 0.0 | 0.0 | 5.2 | 6.9 | 8.5 |
| Wan Chai | Tin Hau and Causeway Bay | 0.0 | 0.0 | 0.0 | 7.6 | 8.8 | 8.3 |
| Sham Shui Po | Lai Chi Kok | 0.0 | 0.0 | 0.0 | 4.4 | 9.0 | 8.3 |
| Sai Kung | Tseung Kwan O West | 0.0 | 0.0 | 0.0 | 6.4 | 8.4 | 8.2 |
| Kowloon City | Hung Hom and To Kwa Wan | 1.8 | 0.0 | 1.8 | 6.1 | 17.2 | 7.9 |
| Kwai Tsing | Tsing Yi South | 0.0 | 0.0 | 0.0 | 8.8 | 15.0 | 7.9 |
| Southern | Deep Water Bay and Repulse Bay | 0.0 | 0.0 | 0.0 | 5.9 | 12.5 | 7.5 |
| Central and Western | Kennedy Town and Shek Tong Tsui | 0.0 | 0.0 | 0.0 | 6.7 | 16.8 | 7.4 |
| Tsuen Wan | Sheung Kwai Chung | 0.0 | 0.0 | 1.0 | 4.7 | 10.3 | 7.3 |
| Tuen Mun | Tuen Mun South | 0.0 | 0.0 | 0.9 | 11.8 | 15.5 | 7.3 |
| Kwai Tsing | Kwai Chung East | 0.0 | 0.0 | 0.0 | 15.2 | 7.2 | 7.0 |
| Yuen Long | Yuen Long Town | 0.0 | 0.0 | 0.0 | 5.2 | 18.1 | 6.9 |
| Kwai Tsing | Tsing Yi North | 0.0 | 0.0 | 0.8 | 8.4 | 30.0 | 6.8 |
| Tai Po | Tai Po East | 1.1 | 0.0 | 0.0 | 34.7 | 10.2 | 6.7 |
| Wong Tai Sin | Wong Tai Sin West | 0.0 | 0.0 | 1.0 | 2.8 | 18.1 | 6.5 |
| Yau Tsim | Tsim Sha Tsui East and King's Park | 0.0 | 0.0 | 0.0 | 2.8 | 9.1 | 6.5 |
| Tsuen Wan | Tseun Wan West | 0.0 | 0.0 | 0.0 | 4.0 | 28.6 | 6.5 |
| Tuen Mun | Tuen Mun North | 0.0 | 0.0 | 0.0 | 7.3 | 9.4 | 6.3 |
| Tuen Mun | So Kwun Wat | 1.8 | 0.0 | 1.8 | 19.3 | 20.5 | 6.1 |
| Kowloon City | Kowloon City | 0.0 | 0.0 | 0.0 | 7.4 | 10.3 | 5.6 |
| Yuen Long | Hung Shui Kiu and Ping Shan | 0.0 | 0.0 | 0.0 | 3.2 | 14.3 | 5.3 |
| Islands | Tung Chung | 0.0 | 0.0 | 0.0 | 1.0 | 4.0 | 4.9 |
| Sha Tin | Tai Wai | 0.0 | 0.0 | 0.0 | 5.0 | 24.2 | 4.8 |
| Wan Chai | Wan Chai | 0.0 | 0.0 | 0.0 | 4.5 | 5.5 | 4.5 |
| Wan Chai | Happy Valley and Tai Hang | 0.0 | 0.0 | 1.8 | 3.5 | 16.7 | 4.3 |
| Central and Western | Central and Admiralty | 0.0 | 0.0 | 1.0 | 0.0 | 14.2 | 3.8 |
| Mong Kok | Mong Kok and Tai Kok Tsui | 0.0 | 0.0 | 0.0 | 1.7 | 0.9 | 3.4 |
| Sai Kung | Tseung Kwan O East | 0.0 | 0.0 | 0.0 | 8.9 | 27.0 | 3.4 |
| Sham Shui Po | Sham Shui Po and Shek Kip Mei | 0.0 | 0.0 | 0.0 | 5.7 | 26.2 | 3.3 |
| Tuen Mun | Tuen Mun West | 0.0 | 0.0 | 0.0 | 17.3 | 12.4 | 3.0 |
| North | Fanling North | 0.0 | 0.0 | 0.0 | 2.4 | 13.1 | 2.4 |
| Yau Tsim | Tsim Sha Tsui and Yau Ma Tei | 0.0 | 0.0 | 0.0 | 7.1 | 4.8 | 0.0 |
Compiled by Averta; not an official FEHD page. Source: FEHD's 2026 gravidtrap index record (data checked on this page: 2026-07-13; covers data through 2026-06). Beyond the monthly index, FEHD also publishes fortnightly batches of the latest figures during mosquito season — this table shows the monthly consolidated index.
Your area's index is high — what should you do?
- Start with standing water — Aedes albopictus can breed in the smallest amount of standing water: plant-pot saucers, open drain channels, rooftop clutter, air-conditioner drip trays. Emptying that water once a week beats spraying repellent every day.
- At the estate level — the index is a district-level figure: podium gardens and shared drainage need the management office to follow up. That's exactly what our property management pest control service does.
- At the flat level — window screens, mosquito patches and fans all help; if it keeps bothering you, book a source inspection with us — inspection is HK$350, fully credited when you book.
Mosquitoes still a problem? Inspection HK$350, fully credited when you book — WhatsApp us, we'll reply the same day
Frequently asked questions
How often is the gravidtrap index updated?
FEHD publishes the district-level consolidated index monthly, and during mosquito season (roughly March to November) also releases fortnightly batches of the latest figures. This page is updated in sync with each FEHD monthly release, with the check date shown at the bottom.
Does a high index mean a much greater chance of catching dengue fever?
The index measures how widely distributed Aedes albopictus is, not a disease-risk forecast. Aedes albopictus is a dengue vector, so whether your area's index is high or low, basic mosquito prevention like clearing standing water is worth doing either way.
Why did my area's index jump so fast?
The index can swing a lot month to month — rain, hot and humid weather, and the pace of standing-water clean-up all play a part. Rather than guessing at the cause, focus on what you can control: standing water at your flat and around the estate.