The Rodent Activity Survey (RAS) for the first half of 2025 has been completed in all districts, and the overall Rodent Absence Rate (RAR) is 96%. Among the 19 surveyed districts, 16 surveyed districts (i.e. about 84%) recorded an increase in the RAR as compared to the second half of 2024, reflecting that the rodent infestation situation has improved.

The overall RAR increased from 94% in the second half of 2024 to 96% in the first half of 2025. For the second half of 2024, the number of survey locations across Hong Kong with RAR below 80% (i.e. more active rodent activities were observed) was 80. Of these, about 91% (73 locations) saw improvement in the first half of 2025, with 51 of them achieving an RAR of over 90%, reflecting significant improvement. Moreover, for the first half of 2025, the number of survey locations with RAR below 80% was 49, dropped by approximately 46% and 39% compared to the first half of 2024 (90 locations) and the second half of 2024 (80 locations), respectively, reflecting the concrete results of the targeted measures adopted by the Department after analysing the RARs.

The RAS results in 2024 and those for the first half of RAS 2025 of all districts are set out below:

District	First half of 2024	Second half of 2024	First half of 2025
Central and Western	95.3%	91.6%	96.2%
Eastern	96.0%	94.3%	93.3%
Southern	98.7%	98.2%	98.4%
Wan Chai	87.1%	91.2%	91.4%
Islands	97.9%	98.0%	97.9%
Kowloon City	93.0%	90.1%	94.2%
Kwun Tong	97.1%	96.3%	97.7%
Mong Kok	94.0%	91.3%	94.6%
Sham Shui Po	90.3%	93.0%	96.1%
Wong Tai Sin	95.2%	89.6%	94.4%
Yau Tsim	95.6%	94.9%	96.0%
North	95.4%	96.5%	97.5%
Sai Kung	99.4%	98.4%	99.3%
Sha Tin	98.4%	97.6%	98.1%
Tai Po	98.3%	98.0%	98.7%
Kwai Tsing	94.6%	95.1%	96.5%
Tsuen Wan	96.9%	93.9%	93.6%
Tuen Mun	97.8%	98.0%	98.9%
Yuen Long	97.9%	97.8%	98.5%

Overall Rodent Absence Rate

95.1%

94.0%

96.0%