Quick summary: Nonthaburi was not listed as an affected province in the DDPM reports of 4, 6 and 7 October 2026, so there is no Nonthaburi household figure to quote. On 29 September 2026 the DDPM sent a Cell Broadcast warning to areas outside the riverside flood walls in Mueang Nonthaburi, Pak Kret and Bang Kruai, and the Nonthaburi DDPM centre warned that between 29 September and 5 October 2026 the Chao Phraya could rise by about 0.20 to 0.40 metres because of dam releases and high tides. Homes that took in water should be cleaned first and then disinfected. Anyone who feels unwell should see a doctor. Call 065-556-6294 or add LINE @whd268.

Example Case: A Wooden Riverside House in Pak Kret Where the Tide Came In Every Night

This is an illustrative scenario based on situations commonly seen in riverside homes. It is not an interview with a real person, and it does not mean every home in the area flooded.

Auntie Wan lives in a raised wooden house on the Pak Kret bank of the Chao Phraya, a home her parents built long before permanent flood walls existed. Because it sits outside the wall line, she is used to the river rising at night and falling back by late morning at the end of every rainy season. When a warning message reached her phone on the night of 29 September, she knew this year needed more preparation than usual.

Her son lifted the fridge and washing machine onto the veranda. On the night of the highest tide, the river spread across the concrete floor beneath the house and the front yard to roughly ankle depth, carrying water hyacinth, scraps of wood, plastic bottles and silt with it.

What she noticed over the next days was that, although the water drained away each morning, the floor never fully dried. Mud clung to house posts and the ground-floor bathroom wall, and a musty smell drifted upstairs. Her three-year-old grandson, who loves running around under the house, developed an itchy rash on his legs, so she took him to a nearby hospital first, then decided to sort out the house properly.

Once the river returned to normal, her son called WHD to ask where to begin. The team explained that the first job is to shovel out the mud, throw away anything soaked that cannot be washed, scrub floors and walls with clean water and detergent, and open the house to dry. Disinfection spraying comes last, to reduce germs on the surfaces that children's hands and feet touch most.

Nonthaburi Floods 2026: The Latest from DDPM and News Reports

Everything in this section comes from sources with clear dates. Treat it as a snapshot on the dates shown, because the water situation changes daily. For the latest on your own street, follow announcements from the Nonthaburi DDPM centre and your local authority directly.

• Not on the affected list: The DDPM reports of 4, 6 and 7 October 2026, which list 27 affected provinces plus Bangkok, do not include Nonthaburi. There are therefore no affected district, sub-district or household figures for Nonthaburi in those reports.
• Warning of 29 September 2026: According to Krungthep Turakij and Matichon, the DDPM sent a Cell Broadcast warning to Mueang Nonthaburi, Pak Kret and Bang Kruai, focused on areas outside the flood walls along the Chao Phraya.
• Watch period 29 September to 5 October 2026: The Nonthaburi DDPM centre warned that the Chao Phraya could rise by about 0.20 to 0.40 metres, as the Chao Phraya Dam released 2,200 to 2,400 cubic metres per second and high tides pushed water upstream.

What these facts tell us is that Nonthaburi's risk this year was not spread across the whole province. It was concentrated in homes, communities, temples, shops and piers that sit outside the riverside flood walls, where water rises and falls with releases from the north and tides from the south. Even when the water is not deep, floors that get wet, dry, and get wet again are exactly the conditions that mold and bacteria like best.

The National Picture: DDPM Report of 7 October 2026

To see where Nonthaburi sits in the bigger picture: according to DDPM data as of 06:00 on 7 October 2026, published by the Government Public Relations Department and Thai PBS, flooding affected 27 provinces plus Bangkok, covering 123 districts, 984 sub-districts, 7,215 villages and 1,154,875 households, with more than 3.1 million people (3,160,972) affected. The DDPM attributed the floods to heavy to very heavy rain in many areas together with water flowing down from the north.

Provinces where water was still rising, according to the DDPM report of 7 October, were Sing Buri, Suphan Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Samut Prakan, Pathum Thani, Ratchaburi, Samut Songkhram, Prachin Buri and Chachoengsao. Bangkok had 329,000 affected households, with the trend falling, and the DDPM said it was monitoring the situation around the clock.

Nonthaburi sits between Ayutthaya and Pathum Thani upstream and Bangkok downstream, so water released down the Chao Phraya passes it on the way to the sea. Riverside homes outside the walls should stay prepared, especially at high tide.

Post-Flood Disinfection in Lak Si, Bangkok: The Latest Situation

Lak Si borders Nonthaburi in northern Bangkok and carries the main roads that Nonthaburi residents use every day: Ngam Wong Wan, Chaeng Watthana and Vibhavadi Rangsit. During the heavy rain of late September 2026, Lak Si was clearly affected. The verifiable facts are these:

• One of 15 high-impact districts: According to Bangkok Metropolitan Administration (BMA) information published on 29 to 30 September 2026, Lak Si was among 15 districts rated as highly affected, covering 748 communities, alongside Khlong Sam Wa, Khan Na Yao, Chatuchak, Bang Khen, Bang Kapi, Bueng Kum, Prawet, Min Buri, Lat Krabang, Wang Thonglang, Suan Luang, Saphan Sung, Sai Mai and Nong Chok.
• 26 September 2026: Thai PBS reported about 12.5 cm of water on Ngam Wong Wan Road and 10.3 cm on Chaeng Watthana Road. The same day, the BMA flood centre listed the Phong Phet intersection on Ngam Wong Wan, and Chaeng Watthana between Lak Si intersection and the Government Complex, as closed to small vehicles.
• 27 September 2026: Vibhavadi Rangsit in front of the Thai PBS station in Lak Si was impassable for small vehicles.
• 28 September 2026, 09:27: The Drainage and Sewerage Department measured 32.8 cm at the Phong Phet intersection and 23.2 cm near Soi Chin Khet on Ngam Wong Wan.
• 3 October 2026: Thai Post reported that Ngam Wong Wan and Chaeng Watthana were dry and traffic was back to normal.

Although the main roads have been dry since early October, recovery work remains inside sois, shophouses and dormitories where water got in, and sewage residue on floors or in bathrooms can pass germs to customers and tenants. The rule is the same as in Nonthaburi: remove mud, wash, dry, then disinfect high-touch areas. WHD can schedule spraying for homes in Nonthaburi and buildings in Lak Si. Call 065-556-6294 or LINE @whd268 to arrange a slot that suits each site.

What Germs Does Floodwater Leave in Nonthaburi Riverside Homes?

Water that enters a riverside home is not clean river water. It is a mix of river water, drain water pushed back up when levels rise, overflow from septic tanks, and silt that has collected contaminants along the way. The World Health Organization (WHO) and the US Centers for Disease Control and Prevention (CDC) agree that any surface touched by floodwater should be treated as contaminated: clean it first, then disinfect it. The germs commonly linked to floods fall into a few broad groups.

1. Bacteria from sewage

Gut bacteria from people and animals, such as E. coli and Salmonella, travel with sewage. After the water drops they can remain on kitchen floors, counters, sink edges and bathroom tiles. Touching those surfaces and then eating, or using dishes that have not been washed properly, can lead to diarrhoea, stomach cramps, nausea or vomiting, especially in young children and older adults.

2. Leptospirosis from mud and standing water

Leptospirosis is caused by bacteria shed in the urine of rats and some other animals. The bacteria survive in standing water and wet soil and enter the body through cuts or skin that has been soaked for a long time. Spaces under raised houses, storage sheds and dirt yards are favourite rat hideouts. Thailand's Department of Disease Control advises anyone with a high fever, headache or muscle pain, especially in the calves, after wading through water to see a doctor and mention the exposure, rather than self-medicating.

3. Viruses spread by hands and surfaces

Some viruses, such as norovirus, which causes vomiting and diarrhoea, and the viruses behind hand, foot and mouth disease in children, spread when people touch a contaminated surface and then their mouth. After a flood, families often crowd into fewer rooms and share bathrooms before cleaning is complete, which raises the chance of passing germs on.

4. Mold and musty odour

According to the CDC, mold can start growing within 24 to 48 hours on wet materials that are not dried. It shows up as black or green patches on walls, door frames, the undersides of cabinets and wooden floors, with a persistent musty smell. Spores can trigger coughing and sneezing in people with allergies or asthma. Riverside homes that get wet and dry repeatedly with the tides are particularly prone to it.

This is general information; spraying is not medical treatment, and anyone unwell should see a doctor first.

Why Washing Alone Often Falls Short: Common Mistakes After Floods in Nonthaburi

1. Cleaning only what you can see: The middle of the floor looks clean, but silt stays behind cabinets, along skirting, under stairs and in tile grout, where germs collect most.
2. Using products the wrong way: Mixing several cleaners can release harmful fumes, while over-diluting makes them ineffective. Rinsing straight after wiping leaves too little contact time.
3. Closing up a damp house: Shutting doors and windows too soon to keep out mosquitoes or dust traps moisture inside, which is ideal for mold.
4. Painting over mold: Fresh paint on a damp, moldy wall usually lets the stains return within weeks.
5. Forgetting shared touch points: Door handles, stair rails, light switches, taps and the dining table are touched by everyone daily but often get only a quick wipe.

Professional spraying finishes the job after washing, reaching corners a cloth cannot. But spraying does not replace mud removal and drying. Surfaces still caked in mud stop the disinfectant from reaching the germs.

How WHD Post-Flood Disinfection Spraying Works in Nonthaburi

According to WHD's service information, trained technicians use spraying and/or ULV (Ultra Low Volume) fogging, which produces a fine mist that spreads throughout a space. The disinfectant is CHEMGENE HLD4H, a medical-grade product from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. The service page describes it as broad-spectrum against viruses, bacteria and fungi, naming COVID-19, RSV, H1N1 and H5N1 influenza and hand, foot and mouth disease virus, with a claimed 99.99% efficacy, and lists related approvals or testing from Thailand's Department of Medical Sciences, Mahidol University, NHS England and the EN 14476:2013+A2:2019 standard.

For organisms not named on the service page, such as Leptospira or E. coli, this article does not claim an organism-specific test result. They belong to the bacteria group the product says it covers, and WHO and CDC advise cleaning then disinfecting flood-contaminated surfaces. If you need test data for a specific organism, ask WHD directly.

1. Enquire and assess: Call 065-556-6294 or message LINE @whd268 with your location, floor area, how high the water reached and photos of the rooms. The team will advise on preparation.
2. Remove mud and wash: You or a cleaning crew shovel out mud, discard soaked items that cannot be washed, scrub floors and walls with clean water and detergent, and ventilate.
3. Zone and prepare: Technicians divide the home into zones such as under-house space, ground floor, kitchen, bathroom and bedrooms. Food, dishes and personal items are sealed away and non-essential appliances switched off.
4. People and pets leave: Everyone, including pets, stays out of the zone being sprayed to avoid breathing the mist.
5. Spray: Technicians spray and/or ULV-fog all surfaces, concentrating on areas the water reached and shared touch points.
6. Wait and re-enter: According to the service information, wait about 30 minutes before normal use, always following the re-entry time the technician gives on site, which can vary with room size and ventilation.

WHD is based in Bang Khae, Bangkok 10160, and has no branch in Nonthaburi. Jobs in Nonthaburi are booked by phone or LINE, with dates depending on the schedule and site readiness, so contact the team early. Pricing is given after the area is assessed. According to the service page, customers receive a free CHEMGENE spray bottle and WELLGIENIC wet wipes, and a tax invoice is available. More details are on the disinfection service page.

On residue: any disinfectant may leave something on surfaces after application, so rinse food-contact surfaces such as chopping boards, prep tables and toys that children put in their mouths with clean water before use, as the technician advises.

10 Reasons Riverside Homes and Businesses in Nonthaburi Should Disinfect After the Water Drops

1. River water is not clean water. Water entering homes outside the flood walls carries sewage, silt and waste.
2. Repeated tides mean repeated wetting. Homes that flood and dry several times hold more moisture than those flooded once.
3. Mist reaches what cloths miss. ULV fog gets into grout, skirting, under stairs and behind cabinets.
4. Protects vulnerable family members. Children, older adults and bedridden relatives often live on the ground floor.
5. Medical-grade disinfectant. WHD's disinfection spraying service uses CHEMGENE HLD4H, which the service page says is used in hospitals, schools, malls, airports, offices, airlines, banks and residential buildings.
6. Broad-spectrum coverage. Per the product information, it covers viruses, bacteria and fungi, suiting post-flood homes where germs come from many sources.
7. Quick return to use. About 30 minutes after spraying, per the service information, which helps riverside shops reopen, always following the technician's timing.
8. Trained technicians. The team knows where to spray, how much to use and how to prepare the space.
9. Peace of mind. Families know every step is done.
10. Easy booking and tax invoice. Book through 065-556-6294 or LINE @whd268 and receive the free CHEMGENE bottle and WELLGIENIC wipes promotion listed on the post-flood disinfection page.

Before and After Disinfection Spraying

Example Case: A Curry-and-Rice Shop Near Tha Nam Non

This illustrative case is based on situations common in riverside restaurants. It is not a real customer review.

Nok runs a small curry-and-rice shop near Tha Nam Non pier. The washing-up and storage area at the back sits slightly below the shop front. During the high-water warnings, water pushed back up through the drain behind the shop and covered the back kitchen floor, so she closed for two days. When it drained, she and her staff scrubbed the floor, washed the shelves and threw away every ingredient that had touched the water.

Nok contacted WHD on LINE and sent photos. The team advised cleaning the kitchen drain, fridge and shelves first, then booked spraying for an afternoon after closing. Dishes and food were sealed in cupboards, staff left during spraying and returned at the time the technician gave. Afterwards she rinsed the prep table and chopping boards with clean water before preparing for the next day.

Recovery Checklist for Nonthaburi and Lak Si

Before cleaning

• Switch off power to areas the water reached and have an electrician check before use.
• Wear boots, rubber gloves and a mask; cover any cuts on hands or feet.

During cleaning

• Remove all mud and silt, including from door tracks and drains.
• Discard food, medicines and cosmetics that touched the water, plus soaked mattresses, pillows and carpets.
• Wash floors, walls and furniture with clean water and detergent; never mix products.
• Open doors and windows and use fans to dry the house quickly.

Before and after spraying

• Seal away food, dishes, toothbrushes and children's toys.
• Show the technician the high-water mark and the rooms children or older adults use most.
• Re-enter at the time given, ventilate, and rinse food-contact surfaces.
• Check for new damp or mold weekly for the first month.
• See a doctor promptly for fever, diarrhoea, rash or calf pain after wading.
• Use the same checklist at a Lak Si workplace, especially storerooms and car parks.

FAQ: Post-Flood Disinfection Spraying in Nonthaburi

Q: Did Nonthaburi flood in 2026?
A: In the DDPM reports of 4, 6 and 7 October 2026, Nonthaburi was not listed as an affected province, but areas outside the riverside flood walls in Mueang Nonthaburi, Pak Kret and Bang Kruai were warned on 29 September 2026. Follow the Nonthaburi DDPM centre for updates.

Q: The water only reached my ankles. Do I need spraying?
A: Depth is not the only factor. Shallow water from drains or the river still carries germs. If it reached the kitchen, bathroom or a play area, wash thoroughly and consider spraying those areas.

Q: Should I wash first or call the technicians straight away?
A: Always remove mud and wash first. Spraying is the step after cleaning, not a substitute.

Q: How long must we stay out?
A: About 30 minutes per the service information, but follow the technician's on-site instruction. People and pets leave the zone during spraying.

Q: What product is used?
A: CHEMGENE HLD4H, a medical-grade disinfectant from the UK. See the CHEMGENE HLD4H product page.

Q: Does WHD have a Nonthaburi branch, and what does it cost?
A: WHD is based in Bang Khae, Bangkok, with no Nonthaburi branch. Book by phone or LINE; dates depend on the schedule, and pricing follows an assessment of the site.

Q: Can buildings in Lak Si use the service?
A: Yes. Homes, shops, offices and dormitories in Lak Si can book through the same channels.

Riverside Home Cleaned? Let WHD Finish the Job with Disinfection Spraying

Homes in Nonthaburi and buildings in Lak Si that took in water can talk to our team for an assessment and a CHEMGENE HLD4H spraying appointment.

See the Disinfection Service

Call 065-556-6294 · LINE @whd268

Related Services

• World Health Disinfection spraying service
• CHEMGENE HLD4H disinfectant
• Residential ozone disinfection for lingering musty air

References

• Government PR Department: DDPM flood report, data as of 7 Oct 2026 https://www.prd.go.th/th/content/category/detail/id/33/iid/548715
• Thai PBS, 7 Oct 2026: https://www.thaipbs.or.th/news/content/559271
• Thai PBS, 4 Oct 2026: https://www.thaipbs.or.th/news/content/559135
• Krungthep Turakij (Nonthaburi warning, 29 Sep 2026): https://www.bangkokbiznews.com/news/news-update/1254212
• Matichon (Nonthaburi DDPM centre): https://www.matichon.co.th/local/news_5911870
• Krungthep Turakij (DDPM 6 Oct 2026): https://www.bangkokbiznews.com/news/news-update/1255230
• Posttoday (15 high-impact districts, 30 Sep 2026): https://www.posttoday.com/general-news/749679
• Thai PBS (flood points, 26 Sep 2026): https://www.thaipbs.or.th/news/content/558579 ; https://www.thaipbs.or.th/news/content/558585 ; https://www.thaipbs.or.th/news/content/558662
• Siam Rath (28 Sep 2026 readings): https://siamrath.co.th/quality-of-life/324664
• Thai Post (roads dry, 3 Oct 2026): https://www.thaipost.net/x-cite-news/1081554/
• CDC Floods: https://www.cdc.gov/floods/ ; WHO: https://www.who.int/news-room/fact-sheets ; Department of Disease Control: https://ddc.moph.go.th/