The Rodent Activity Survey (RAS) for the first half of 2026 has been completed in all districts. The overall Rodent Absence Rate (RAR) is 96.4%, compared with 96.0% in the first half of 2025 and 96.1% in the second half of 2025, reflecting that the overall rodent infestation situation has remained at a good and stable level.
To improve environmental hygiene conditions at priority areas in a more targeted manner, the Department has actively leveraged the RAR data and fully implemented technology and data-driven rodent control strategy, which has achieved significant results:
Significant improvement at priority survey locations: Of the 44 survey locations across Hong Kong with RAR below 80% in the second half of 2025 (i.e. locations where more active rodent activities were observed), nearly 89% (39 locations) saw significant improvement in the first half of 2026. Among these locations, 29 recorded an RAR over 90%, reflecting a significant reduction in rodent activities at the locations concerned.
Continued reduction in locations with more active rodent activities: In the first half of 2026, the number of survey locations with RAR below 80% decreased to 34, representing a drop of approximately 31% and 23% compared with the first half of 2025 (49 locations) and the second half of 2025 (44 locations), respectively. When compared with the first half of 2024 (90 locations) and the second half of 2024 (80 locations), the number decreased significantly by approximately 62% and 58%, respectively. This demonstrates that the rodent control and prevention measures adopted by the Department are on the right track and have achieved significant results.
The Department will continue to enhance data analysis and the application of technology, and press ahead with various rodent prevention and control measures on a sustained basis. Together with members of the public, the Department will strive to build a cleaner environment.
Breakdown of the number of survey locations with RAR below 80% in the second half of 2025, compared to the survey results from the first half of 2026, are set out below:
| Rodent Absence Rate (RAR) of Second Half of 2025 | Number of Survey Locations | Number of Survey Locations with Improvement in RAR in first half of 2026 Note | Percentage of Survey Locations with Improvement |
| Below 50% | 3 | 3(2) | 100% |
| 50% to below 60% | 3 | 3(1) | 100% |
| 60% to below 70% | 17 | 16(12) | 94% |
| 70% to below 80% | 21 | 17(14) | 81% |
Note : ( ) represents the number of survey locations where the RAR achieving 90% or above
The RAS results for all districts for 2025 and the first half of 2026 are set out below:
|
District |
First half of 2025 | Second half of 2025 | First half of 2026 |
|||
| RAR | Number of Survey Locations with RAR below 80% | RAR | Number of Survey Locations with RAR below 80% | RAR | Number of Survey Locations with RAR below 80% | |
|
Central and Western |
96.2% |
3 |
97.6% |
2 |
95.4% |
4 |
|
Eastern |
93.3% |
6 |
98.6% |
0 |
97.4% |
0 |
|
Southern |
98.4% |
0 |
97.3% |
1 |
99.2% |
0 |
|
Wan Chai |
91.4% |
9 |
92.4% |
12 |
93.4% |
9 |
|
Islands |
97.9% |
0 |
98.7% |
0 |
98.5% |
1 |
|
Kowloon City |
94.2% |
5 |
91.9% |
11 |
92.8% |
8 |
|
Kwun Tong |
97.7% |
0 |
97.2% |
0 |
96.0% |
2 |
|
Mong Kok |
94.6% |
5 |
96.9% |
0 |
98.7% |
0 |
|
Sham Shui Po |
96.1% |
3 |
94.9% |
5 |
95.0% |
3 |
|
Wong Tai Sin |
94.4% |
4 |
97.6% |
0 |
98.7% |
0 |
|
Yau Tsim |
96.0% |
4 |
94.5% |
5 |
98.5% |
0 |
|
North |
97.5% |
1 |
97.1% |
2 |
98.4% |
0 |
|
Sai Kung |
99.3% |
0 |
99.5% |
0 |
99.0% |
0 |
|
Sha Tin |
98.1% |
0 |
96.4% |
1 |
98.3% |
0 |
|
Tai Po |
98.7% |
0 |
97.9% |
1 |
99.5% |
0 |
|
Kwai Tsing |
96.5% |
4 |
97.2% |
0 |
94.6% |
2 |
|
Tsuen Wan |
93.6% |
5 |
96.7% |
2 |
94.6% |
2 |
|
Tuen Mun |
98.9% |
0 |
98.1% |
0 |
99.2% |
0 |
|
Yuen Long |
98.5% |
0 |
96.7% |
2 |
95.3% |
3 |
| Overall Rodent Absence Rate / Total |
96.0% |
49 |
96.1% |
44 |
96.4% |
34 |