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Seoul turns to high-tech solutions to combat surge in rat population
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By Park Ung
Seeking to restore its image as a clean, hypermodern metropolis, Seoul is rolling out a high-tech campaign against its burgeoning rat population, deploying a data-driven “smart” control system to curb the recent surge in urban sightings. The initiative represents a major shift in the city’s approach to urban sanitation, moving from traditional extermination tactics toward predictive, networked intervention.
The city government said Thursday that the program focuses on installing sensors in known infestation hotspots. Connected to the internet, these devices will provide around-the-clock, real-time monitoring of rodent activity, enabling municipal workers to pinpoint breeding areas and respond with speed and efficiency. The initiative aims to create a digital shield, harnessing technology to tackle a persistent public health challenge.
When a rat enters a baited device, the door will automatically close and send an alert so it can be retrieved.
“Unlike conventional traps or poison left in open areas, the smart devices store bait inside a sealed box, reducing risks to pets and the environment and keeping carcasses out of public view,” the city said.
Complaints about rat sightings in Seoul have more than doubled over the past three years, from 1,043 in 2021 to 2,181 in 2024, according to city data submitted this month to Rep. Kim Wi-sang of the main opposition People Power Party.
This year alone, 1,555 cases were reported between January and July, already surpassing 70 percent of last year’s total.
The city believes the surge is largely linked to heat waves and heavy rain. When underground facilities and sewer systems flood, rats move aboveground in search of food. During heat waves, rising temperatures belowground also drive them upward toward cooler and more ventilated areas.
To better respond to reports, officials will use a geographic information system to track results in real time, allowing them to monitor capture rates and adjust installation zones based on performance.
Seoul allocated 580 million won ($402,000) to its 25 districts to implement rat control systems tailored to local needs.
Efforts to prevent rodent-borne diseases will also be strengthened. When a case is reported, a 500-meter radius around the site will be designated as an intensive control zone, followed by a two-week pest control operation.
In addition, the city will launch campaigns urging residents and businesses to avoid leaving garbage outside and to use sealed containers, especially in markets, restaurants and parks where outdoor food waste attracts rats.
“The city will work to create a cleaner and safer urban environment by combining the smart rat control system with coordinated public-private efforts to keep rodents out of living spaces,” said Song Eun-cheol, head of the city’s Infectious Disease Control Division.
Those who spot rats in public areas are advised not to touch or attempt to catch them, but instead report the sighting to the 120 Dasan Call Center or the public health center in their district.