Kranji Reservoir, Singapore
Kranji Reservoir is a major freshwater reservoir located in the northern part of Singapore, within the Kranji Planning Area. Formed by damming the lower reaches of the Kranji River, the reservoir plays a vital role in Singapore’s water supply system while also serving as a popular destination for fishing, picnicking, and nature appreciation. The surrounding Kranji Reservoir Park provides a tranquil escape from the urban bustle and offers panoramic views of the water, mangroves, and nearby forest reserves.
History
The Kranji Reservoir was created in 1975 as part of Singapore’s continued efforts to expand its freshwater catchment capacity1. Before its damming, the Kranji River flowed northward into the Straits of Johor. The construction of the Kranji Dam across its estuary transformed the lower river basin into a freshwater body, effectively preventing seawater intrusion and allowing the collection of rainwater from the surrounding catchment areas.
The project was undertaken by the Public Utilities Board (PUB) as part of a nationwide strategy to diversify Singapore’s water sources. The completion of Kranji Reservoir marked an important milestone in reducing dependence on imported water and increasing local water sustainability. Over time, the area around the reservoir was landscaped into a recreational park and became part of the wider Northern Catchment network.
Geography and Hydrology
Kranji Reservoir is situated just south of the Straits of Johor and bounded by Sungei Kadut, Lim Chu Kang, and Woodlands Planning Areas. The reservoir receives inflows from several natural streams and canals, most notably Kranji River, Sungei Peng Siang, and Sungei Tengah. Its catchment area encompasses a mix of rural farmland, nature reserves, and industrial zones, making it one of the more diverse hydrological basins in Singapore.
The reservoir’s design includes both an upper and lower basin, separated by control structures that help regulate water flow and quality. The upper section serves primarily as a collection basin, while the lower section—closer to the Kranji Dam—is used for storage and distribution to nearby treatment plants. The dam structure also acts as a road link, connecting the areas of Lim Chu Kang and Woodlands.
Kranji Reservoir Park
Located along Kranji Way, Kranji Reservoir Park spans about 9 hectares and offers a scenic retreat for nature lovers and anglers. Managed by the National Parks Board (NParks), the park is designed with open lawns, shaded picnic spots, and two designated fishing grounds that draw enthusiasts from across Singapore. From the park’s promenade, visitors can enjoy views of the Straits of Johor and even spot parts of Johor Bahru on clear days.
The park is also historically significant. A memorial plaque near the main entrance commemorates soldiers who defended the Kranji area during the Second World War. The nearby Kranji War Cemetery and Kranji War Memorial further underscore the area’s wartime heritage.
Biodiversity and Ecology
The area surrounding Kranji Reservoir supports rich biodiversity. The mixture of freshwater habitats, secondary forest, and mangrove fringes provides ideal conditions for a range of wildlife species. Birds such as kingfishers, herons, egrets, and raptors are commonly sighted, while the waters themselves are home to tilapia, catfish, and various native fish species.
The proximity of the reservoir to the Sungei Buloh Wetland Reserve enhances its ecological value. The two ecosystems form an important green and blue corridor for migratory birds and aquatic species moving between inland and coastal zones. PUB and NParks jointly monitor the water quality and manage vegetation to maintain ecological balance and minimise pollution risks.
Role in Singapore’s Water Supply
Kranji Reservoir forms part of Singapore’s Four National Taps — the framework ensuring water sustainability through diversified sources: local catchments, imported water, NEWater, and desalinated water. Water from Kranji Reservoir is channelled to the Kranji Waterworks, where it undergoes advanced treatment before distribution to homes and industries.
The Kranji catchment plays an important role in capturing runoff from the northern agricultural and semi-rural zones of Singapore. The PUB continuously monitors the reservoir’s capacity and quality, with water-level adjustments carried out at the dam to manage both supply and flood control functions.
Recreation and Tourism
Although less commercialised than some other reservoirs, Kranji Reservoir offers a serene environment for outdoor recreation. Activities include:
- Fishing: The park’s fishing grounds are among the few legally designated freshwater fishing spots in Singapore.
- Picnicking: Families and groups often visit for picnics along the shaded lawns and waterfront areas.
- Nature walks: Walking trails around Kranji Way provide access to scenic lookouts and link to nearby nature reserves.
- Photography: The site’s tranquil scenery and sunsets make it a popular spot for landscape and wildlife photography.
In recent years, the area has been integrated into the Kranji Countryside tourism belt, which includes nearby attractions such as farms, nature trails, and heritage sites. Visitors often explore both Kranji Reservoir Park and the surrounding agricultural attractions on the same trip.
Infrastructure and Accessibility
Access to Kranji Reservoir is mainly via Kranji Way, which connects to Woodlands Road and Mandai Road. The area is also reachable from the Bukit Timah Expressway (BKE), offering convenient connectivity to the rest of Singapore. Public transport users can take a bus from Kranji MRT Station on the North South Line to nearby stops along Kranji Way.
Facilities at Kranji Reservoir Park include car parks, rest shelters, benches, and fishing platforms. The park is also connected to the Park Connector Network (PCN), allowing cyclists to travel between Kranji and neighbouring green spaces such as Mandai and Sungei Buloh Wetland Reserve.
Environmental Management
Because the reservoir’s catchment includes agricultural and industrial areas, PUB enforces strict environmental regulations to safeguard water quality. Measures include buffer zones, controlled discharge limits, and periodic water testing. The Kranji Reservoir Catchment Scheme also promotes sustainable agricultural practices among local farms to minimise runoff pollution.
Public education initiatives, such as the Active, Beautiful, Clean Waters (ABC Waters) programme, encourage community stewardship. Visitors are reminded to refrain from littering, feed wildlife responsibly, and protect the delicate freshwater ecosystem.
Interesting Facts
- Kranji Reservoir was Singapore’s fifth impounding reservoir when completed in 1975.
- It was one of the first reservoirs created in a predominantly agricultural setting.
- The reservoir park’s fishing grounds are open daily from 7:00 am to 7:00 pm.
- On clear days, one can see across the Straits of Johor into Malaysia from the dam crest.
- Kranji Dam also serves as a road link between Lim Chu Kang and Woodlands, reducing travel time in northern Singapore.
Conclusion
Kranji Reservoir stands as a vital component of Singapore’s water infrastructure and a cherished green space in the island’s north. Combining practical water management with natural beauty, it reflects Singapore’s commitment to sustainable urban planning. Whether for leisure, fishing, or quiet reflection, Kranji Reservoir continues to attract visitors seeking peace and connection with nature in one of the most scenic corners of the country.
Kranji Reservoir is 
on the Map of Reservoirs in Singapore
References
- Public Utilities Board (PUB) – Singapore’s National Water Agency
- National Parks Board – Kranji Reservoir Park
- Visit Singapore – Kranji Reservoir Park
- The Straits Times – Singapore Reservoirs and Catchments
Page Details
This page was created on 5 October 2025. Hi, my name is Timothy and created it from my research, for my own entertainment, knowledge and to satisfy my curiosity. I am providing the information to you in good faith and hope it is useful. I try to get the details as accurate as possible. I also try to update the page whenever I stumble on new details. So this and all my other pages are perpetual work in progress. If you discover any error, please politely inform me, pointing out where the error lies, and I will correct it as soon as possible. Your helpfulness will keep this page accurate, relevant and helpful to those who need the information.List of Reservoirs in Singapore
Want to share your Singapore travel experiences or get tips from fellow travellers?
Join the Singapore Travel Tips Facebook GroupMore information for visiting and living in Singapore
Here are some related articles to help you get to know Singapore better.- Cost of Living in Different Singapore Neighbourhoods (2025 Guide)
- EZ-Link Card
- Owning a Car in Singapore
- Singapore MRT Map & Guide 2025
- Singapore Postal Districts and Postcodes
- Singapore Tourist Pass
- Taking the Bus in Singapore: A Visitor's Guide
- Understanding CCR, RCR and OCR in Singapore real estate
