Executive Summary for Water Supply Disruptions Bangkok, Nonthaburi and Samut Prakan
The Metropolitan Waterworks Authority (MWA) has announced temporary water-supply interruptions and low-pressure conditions across selected areas of Bangkok, Nonthaburi and Samut Prakan from 28 to 29 September 2026. The disruptions are linked to temporary shutdowns required for water-pipeline connection works at multiple locations. The affected locations will experience disruptions at different times, including daytime interruptions on 28 and 29 September and overnight disruption in parts of Nonthaburi.
- Date of Event: 28–29 September 2026
- Location: Bangkok, Nonthaburi and Samut Prakan, Thailand
- Risk Category: Critical Infrastructure
- Severity Score: 3/5
- Confidence Level: 75%
What is Risk Analysis in the Context of Critical Infrastructure Events
Critical infrastructure event risk analysis assesses the impact of outages to utility infrastructure systems. Temporary water-supply shutdowns can affect residential, commercial and industrial activities that depend on continuous access to piped water. The primary concern in this case is localized disruption within the areas and time windows identified by the MWA.
Known Hotspots and Sensitive Areas
High Impact
- Nonthaburi: Areas around the Pak Kret Five-Way Intersection, Tiwanon-Pak Kret Road, Chaeng Watthana Road, Pak Kret bypass and surrounding connecting roads from 2200 hours on 28 September to 0500 hours on 29 September.
- Bangkok: Sangkhā Santi Suk Road, specifically Soi 30, from 1000–1600 hours on 28 September.
- Bangkok: Sections of Krung Thon Buri Road, Charoen Nakhon Soi 66/1, Ratchadaphisek Road, Tha Din Daeng Soi 13 and Tha Kham Soi 28 from 1000–1600 hours on 29 September.
Medium Impact
- Samut Prakan: Areas around Bua Nakhon Road, Wat Plad Priang, Nam Daeng–Bang Phli Road, Panwithi Road and surrounding canal-side areas from 1000–1600 hours on 29 September.
- Additional areas of Nonthaburi, including Tiwanon-Pak Kret Soi 42 and locations around Sai Ma, Nakhon In and Bang Kruai–Sai Noi roads, where interruptions are scheduled on 29 September.
Low Impact
- Areas outside the specifically listed MWA work zones are not expected to experience direct disruption from these scheduled works.
Impact on Transportation and Services
The disruption primarily concerns water availability rather than road transportation. Businesses, hotels, restaurants, offices and other facilities within the affected zones may experience reduced or unavailable water supply during the specified periods.
Multidimensional Impact
The wider Bangkok metropolitan area is also experiencing heavy rainfall and flooding, which has affected travel and prompted Thailand’s government to designate 28–29 September as special public holidays in Bangkok, Nonthaburi, Pathum Thani and Samut Prakan. This is separate from the scheduled water works but may affect overall business and operational conditions during the same period.
Recommended Actions
- Store sufficient water before the scheduled interruption period.
- Businesses should identify whether their premises fall within an MWA-listed affected zone.
- Hotels, restaurants and facilities with high water consumption should review contingency arrangements.
- Schedule water-intensive maintenance or operational activities outside the affected periods where possible.
- Monitor MWA updates for changes to restoration times.
Emergency Contacts
- Emergency Services: 191
- Medical Emergency: 1669
- Metropolitan Waterworks Authority: 1125
Final Thoughts
Temporary water-supply interruptions are scheduled across selected areas of Bangkok, Nonthaburi and Samut Prakan on 28–29 September. The disruption is localized and time-specific, but businesses operating within the listed areas should prepare for periods of low or unavailable water supply. Leveraging MitKat’s Datasurfr enables businesses to receive real-time intelligence, monitor evolving threats and make informed decisions to protect people, assets and operations.