Chiayi City Breaks Ground on Major Sewer Expansion, Pushing Infrastructure East of the Railway to Serve a Growing City
Post Date: September 3
Public Works Department / Tourism and Information Department
Chiayi City today broke ground on the second package of its Phase II wastewater infrastructure project, marking another major step in expanding the city's sewer network east of the railway and into the Huzi Nei area. Chiayi Mayor Huang Min-hui and Minister of the Interior Liu Shih-fang attended the groundbreaking ceremony and prayed for the project's successful completion.
The project will connect approximately 3,241 households to the sewer system and construct one pumping station. It is scheduled for completion in March 2029, further extending wastewater services beyond the railway and laying a stronger foundation for the city's long-term urban development.
Mayor Huang said Chiayi's wastewater infrastructure has advanced through years of challenges, from policy changes and difficulties attracting private investment to the impacts of COVID-19, labor and material shortages, and rising construction costs. Under the Phase I program, the city invested NT$4.369 billion from 2015 to 2024, completing 11 construction packages and connecting more than 15,000 households by the end of 2024 — exceeding the original target.
She thanked residents and the city government team for their cooperation throughout numerous public briefings and coordination meetings. As more households connect to the system, residents are increasingly seeing the benefits of improved sanitation and cleaner neighborhood environments. "Wastewater infrastructure may be largely invisible, but its impact on everyday life is real," Huang said, emphasizing the city's commitment to keeping the project moving forward.
The mayor also highlighted the importance of forward-looking infrastructure planning. Drawing lessons from the experience of Hsinchu and Southern Taiwan Science Parks, where industrial development outpaced transportation infrastructure, Huang urged the central government to move ahead with a rail connection between Chiayi HSR Station and the urban area. Chiayi's high-speed rail and conventional rail stations now serve more than 14 million passengers annually, while existing BRT services face growing demand. With the Chiayi Science Park and the broader Southern Taiwan Silicon Valley initiative accelerating, such a connection would create an integrated transportation network linking high-speed rail, conventional rail, the Alishan Forest Railway, and the wider Yunlin–Chiayi–Tainan region.
Interior Minister Liu said total investment in Chiayi's first, second, and third phases of wastewater infrastructure is expected to reach approximately NT$13 billion. The Ministry of the Interior will continue to support Chiayi's infrastructure development and provide as much assistance as possible through central government funding, she said.
Public Works Department Director Yu Cheng-yu noted that the city has also upgraded alleys and drainage systems during household connections, including pavement and utility line improvements. Five locations have incorporated local characteristics into alley beautification projects, transforming once-unpleasant spaces into cleaner and more livable environments. Chiayi's wastewater construction efforts have received national recognition, with the city ranking No. 1 in its category for five consecutive years in the national evaluation of wastewater sewer construction.
The Phase II program, with a total budget of NT$4.633 billion, includes 14 construction packages and is scheduled to run from 2025 to 2030. Central government funding accounts for NT$4.367 billion, with the city contributing NT$266 million. The program is expected to connect 28,818 additional households, bringing total sewer connections citywide to approximately 43,903 households.
The latest package includes approximately 4.3 kilometers of major and secondary sewer lines, 17.2 kilometers of local connecting pipes, household connections, and one pumping station. Once completed, it is expected to increase Chiayi's overall sewer connection coverage by approximately 2.96 percentage points.
The Huzi Nei area is one of Chiayi's key emerging urban districts, with new housing and a growing population. The project will improve sanitation, reduce wastewater pollution, and ensure that underground infrastructure keeps pace with above-ground development such as roads, parks, and housing — providing a stronger foundation for the area's continued growth.