The Ko Thepho Flood, as Reported

According to TNews on 5 October 2026, the Ban Ko Sawan community in Village No. 6, Ko Thepho Subdistrict, Mueang Uthai Thani District, was flooded to a depth of about 1 to 1.5 metres by water from the Chao Phraya basin and the Sakae Krang river. The flood affected five subdistricts: Ko Thepho, Nam Suem, Sakae Krang, Hat Thanong and Tha Sung.

The same report said water covered the bridge over the Sakae Krang river, the main route into town, cutting it off for several weeks. For residents that means far harder trips to work, school, market and hospital, with many families relying on boats or wading every day.

Nationally, Department of Disaster Prevention and Mitigation (DDPM) figures published by the Government Public Relations Department as of 06.00 on 7 October 2026 listed 27 provinces plus Bangkok as affected, covering 123 districts and 984 subdistricts, with 1,154,875 households and more than 3.1 million people affected.

Note: water levels, affected areas and road status change daily. Check the latest announcements from Uthai Thani Province, the municipality and DDPM before travelling.

The key feature of the Ko Thepho flood is that the water did not rush through like a flash flood. River water rose slowly and then stood still for a long time. Warm, still water full of organic matter such as food scraps, rubbish, rotting leaves and sewage from submerged toilets suits many bacteria. Walls, timber floors and furniture soaked for weeks absorb water far more deeply than in a short flood, so mold grows easily and keeps coming back long after the water has gone.

Example Case: A Riverside Home in Ban Ko Sawan, Reached Only by Boat for Weeks

Note: this is an example case based on situations that commonly occur in riverside communities during long floods. It is not the verified account of any specific person.

Paen lives in a single-storey house, half concrete and half timber, with her mother, who is in her seventies, and her three-year-old son. Every morning she makes Thai desserts to sell at the market in town. When the water started creeping into the community, she lifted the fridge, the TV and the rice sacks onto tables, expecting the water to drop in a few days. Instead it rose slowly to almost waist height and stayed there for weeks.

The family lived on a raised wooden platform inside the house, paddling out to collect donations at a dry stretch of road. The toilet was unusable, so they used waste bags and mobile toilets. The water around the house turned dark green, with rubbish and vegetable scraps drifting in circles, and the smell grew worse each day. Her son developed a low fever with spots in his mouth and on his palms. Her mother got diarrhoea after eating rice cooked with water from a jar whose lid did not close properly.

Paen took both of them to hospital by boat. The doctor examined the boy, gave advice on caring for a child with symptoms resembling hand, foot and mouth disease, and stressed the need for safe drinking water for her mother. When the water finally receded, Paen found sediment lines almost one and a half metres up the walls, warped timber floors, green-black mold along the lower walls, plywood cabinets swollen shut, and a damp smell that no amount of open windows would clear.

With neighbours she scrubbed the house for a full day, threw out the mattress, plywood cabinets and rugs, and ran fans for days. But she still worried about her son's toys, the floor where he crawled, and the kitchen where she makes desserts to sell. If germs remained, her son could fall ill again, and her customers could be affected too. She decided to have a professional team disinfect the whole house, focusing on the kitchen, bathroom and play corner, before she went back to work.

Flood Germs in Ko Thepho, Uthai Thani: When Still Water Stays for Weeks

Ko Thepho's flood was river water that rose and stayed waist-deep for a long time while many people kept living at home, drawing water from jars and wading daily. The germs to watch are those spread through contaminated drinking water, those carried by sewage in still water, those that pass among small children, those that enter through skin and wounds, and molds that grow on homes soaked for weeks. Here are ten groups worth knowing.

1. Leptospira, the Cause of Leptospirosis

How it arrives: during a long flood, rats retreat to roofs, ceilings and raised piles of belongings. Their urine, which can carry Leptospira, drips into the still water around the house, so people who wade in and out every day are exposed again and again.

Where it hides: sediment on floors, the base of walls, under cabinets and platforms, and puddles around the house.

Symptoms and who is at risk: sudden high fever, headache, muscle pain especially in the calves, and red eyes, usually within about 2 to 30 days. Daily waders, boat ferriers and volunteers face the highest risk. Anyone with fever after wading should see a doctor promptly.

Prevention: rubber boots, waterproof plasters, limiting time in the water, and showering with soap right after.

2. Salmonella Typhi, the Cause of Typhoid Fever

How it arrives: typhoid is caused by a type of Salmonella that passes from person to person through faecal contamination of water and food. With toilets submerged for weeks and families relying on stored water, the risk of contaminated drinking water rises.

Where it hides: poorly covered water jars, cups, plates, chopping boards and the hands of food preparers.

Symptoms and who is at risk: fever that climbs over several days, headache, weakness and abdominal pain, sometimes with constipation or diarrhoea. Anyone with fever lasting more than three days after a flood should see a doctor.

Prevention: boiled or sealed bottled water, freshly cooked food, and handwashing before eating and after the toilet.

3. Vibrio cholerae, the Cholera Risk When Sanitation Fails

How it arrives: WHO notes that cholera risk rises where drinking water and sanitation are disrupted, as can happen after floods. It does not occur everywhere, but long-standing water mixed with sewage is a condition to take seriously.

Where it hides: unboiled drinking water, food rinsed in contaminated water, utensils and kitchen surfaces.

Symptoms and who is at risk: large amounts of watery diarrhoea, sometimes like rice water, vomiting and rapid dehydration. Young children and older adults need medical care immediately.

Prevention: safe water for drinking, washing vegetables and cleaning utensils, handwashing with soap, and oral rehydration salts as advised by health staff.

4. Hepatitis E Virus from Sewage-Contaminated Water

How it arrives: hepatitis E spreads mainly through drinking water contaminated with faeces. WHO notes outbreaks often follow flooding or disruption of safe water supplies.

Where it hides: water jars, storage tanks, taps and unwashed water containers.

Symptoms and who is at risk: fatigue, loss of appetite, nausea, and yellow skin and eyes. Pregnant women and people with chronic liver disease need particular care and should see a doctor at once if symptoms appear.

Prevention: clean and disinfect jars before refilling, drink boiled water, and keep drinking water separate from washing water.

5. Norovirus, the Fast-Spreading Stomach Virus

How it arrives: norovirus spreads very easily through food, water, surfaces and close contact. Queues for donated food and shared mobile toilets help it move quickly through a community.

Where it hides: door handles, stair rails, dining tables, bathrooms and any surface soiled by vomit or diarrhoea. It can survive on surfaces for days.

Symptoms and who is at risk: nausea, forceful vomiting, diarrhoea and cramps, usually starting within one to two days. Young children and older adults risk dehydration.

Prevention: wash hands with soap, since alcohol gel alone may not be enough, clean up vomit promptly while wearing gloves, and keep a sick person's items separate.

6. Enteroviruses, the Cause of Hand, Foot and Mouth Disease

How it arrives: enteroviruses, including enterovirus 71, cause hand, foot and mouth disease and spread through saliva, nasal mucus, blister fluid and stool. The rainy season is already a peak time; children crowded together during a flood and sharing toys spread it more easily.

Where it hides: toys, bottles, feeding spoons, blankets, sleeping mats and crawling areas.

Symptoms and who is at risk: fever, sore mouth with ulcers, and spots on the palms, soles and buttocks. Children under five are most at risk. A child who is drowsy, vomits repeatedly or shows unusual jerks or weakness needs a hospital at once.

Prevention: frequent handwashing for children and carers, daily cleaning and disinfection of toys, and keeping sick children apart.

7. Pseudomonas aeruginosa, a Moisture-Loving Wound Bacterium

How it arrives: Pseudomonas lives in water and soil and thrives where things stay wet. Weeks of standing water turn bathrooms, drains and houses into ideal habitat.

Where it hides: drains, sinks, dish sponges, constantly damp hand towels, carpets and bathroom floors.

Symptoms and who is at risk: wound infections, pustular rashes on long-soaked skin and outer ear infections. People with diabetes, burns or chronic wounds and weakened immunity are at greater risk.

Prevention: replace sponges and cloths that sat in floodwater, dry skin after wading, keep wounds clean, and see a doctor for pus or odour.

8. Mycobacterium marinum from Still Water and Fish Handling

How it arrives: this organism lives in fresh and still water and in fish. During floods many people catch fish that swim into the village or clean flooded fish ponds and aquariums. Scratches on the hands let it in.

Where it hides: standing pools, fish ponds, aquariums, fishing gear and surfaces wet with still water for long periods.

Symptoms and who is at risk: red bumps or nodules on the hand or fingers that grow slowly and do not heal, sometimes spreading up the arm. People who handle fish barehanded are most at risk; a lingering sore after water contact should be shown to a doctor with the full history.

Prevention: gloves for fish and pond work, and washing hands and any wound with soap and clean water straight away.

9. Dermatophytes and Bacteria Behind Flood Foot

How it arrives: wading daily for weeks softens the skin, letting dermatophyte fungi and skin bacteria cause rashes, cracks between the toes and infected sores.

Where it hides: footwear that never dries, socks, foot towels and bathroom floors.

Symptoms and who is at risk: itching, redness, peeling and soggy, smelly skin between the toes. Daily commuters through water and people with diabetes need extra care.

Prevention: wash and dry the feet each time, dry footwear in the sun, and use powders or medicines as a pharmacist or doctor advises.

10. Molds in Long-Soaked Homes: Cladosporium, Penicillium, Mucor and Black Mold (Stachybotrys)

How it arrives: weeks of soaking push moisture deep into concrete, plywood and ceilings. According to CDC guidance, mold can start growing within 24 to 48 hours of materials getting wet, and the longer they soak, the deeper it goes.

Where it hides: lower walls with water lines, behind cabinets, under timber floors, plywood, wallpaper, mattresses and curtains.

Symptoms and who is at risk: sneezing, blocked nose, coughing, and irritated eyes and skin. Allergy and asthma sufferers, older adults and small children react more easily, and people with weak immunity must guard against serious fungal infection.

Prevention: discard moldy porous materials, scrub mold off hard surfaces wearing an N95 mask and gloves, dry the house fast, and never paint over mold before walls are fully dry.

This is general information, not a diagnosis. Anyone with fever, severe diarrhoea, yellow eyes, an inflamed wound, or a child with unusual symptoms after the flood should see a doctor or visit the local health centre immediately.

Linking Ko Thepho's Flood Germs to Cleaning and Disinfection Spraying

WHO and the CDC advise cleaning flood-contaminated surfaces first and disinfecting second, because sediment and grease shield germs from disinfectant. The order is: remove sediment and rubbish, scrub with water and detergent, let surfaces dry, then spray disinfectant across every surface.

According to World Health Disinfection (WHD) service information, the spraying service uses CHEMGENE HLD4H, a medical-grade disinfectant from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. Trained technicians apply it by spraying and/or ULV (Ultra Low Volume) fine-mist fogging to reach corners and surfaces that are hard to wipe.

According to WHD product and service information, the disinfectant is stated to cover a range of viruses, bacteria and fungi. The listed organisms include norovirus, hand-foot-and-mouth virus, Salmonella, mycobacteria, RSV, influenza H1N1 and H5N1, and fungi, with the service page stating 99.99% efficacy. For the other organisms here, such as Leptospira, Vibrio cholerae, hepatitis E, Pseudomonas, dermatophytes and the individual mold genera, and for specific types such as Salmonella Typhi and Mycobacterium marinum, WHD does not claim organism-specific test results. They belong to the bacteria, virus and fungi groups the product says it covers. Ask the WHD team directly if you need test data for a particular organism.

Spraying reduces germs on household surfaces. It does not make water in a jar safe to drink, and it never replaces medical treatment. Drinking water should always be boiled or bottled.

What Ko Thepho Families Face If They Skip Disinfection

• Health: small children fall ill again, older adults get repeated diarrhoea, and mold triggers rashes and allergies.
• Income: anyone cooking food for sale at home needs a clean kitchen before reopening, because customers are at risk too.
• Time: with the main route into town cut for weeks, every hospital trip costs more time and money.
• Home: mold in the walls peels paint, rots timber and keeps the musty smell alive.

Why Scrubbing Alone Is Not Enough in Ko Thepho

Long floods drive germs deeper. Concrete and timber soaked for weeks absorb contaminated water into the material, so washing only the outer surface may fall short.

Bleach is easy to misuse. The wrong strength damages surfaces, and mixing it with some bathroom cleaners can release dangerous gas.

Hands cannot reach every gap. Under counters, behind cabinets, door edges and floor joints are often missed, yet they collect the most sediment.

Air freshener does not remove the cause. A musty smell means mold and bacteria are still there; perfume only masks it for a while.

WHD's Post-Flood Disinfection Spraying Process for Homes in Ko Thepho, Uthai Thani

WHD is based in Bang Khae, Bangkok 10160. Jobs in Uthai Thani are arranged case by case by phone or LINE. There is no local branch and no same-day guarantee, especially while some routes remain cut off. The main steps are:

1. Survey and assessment: send photos, floor area and post-flood condition via LINE @whd268 or call 065-556-6294; the team checks whether the house and route are ready.
2. Clean first: remove sediment, rubbish and soaked materials, scrub surfaces and let them dry as far as possible.
3. Zoning: divide the house into zones such as kitchen, bathroom, bedrooms, children's play area and storage.
4. Spraying: according to service information, technicians spray and/or ULV-fog with CHEMGENE HLD4H. People and pets leave each zone while it is treated.
5. Waiting and re-entry: according to service information, wait about 30 minutes before using the space normally, following the time the technicians give.

WHD does not claim the product leaves no residue, and anyone who is unwell should also see a doctor.

10 Reasons Homes Along the Sakae Krang Should Be Disinfected After the Flood

1. Weeks of standing water give germs time to multiply and sink into materials.
2. Submerged toilets released sewage into the water around homes for the whole flood.
3. Many people stayed at home during the flood, touching the same surfaces every day.
4. ULV fine-mist spraying reaches gaps and joints that are hard to wipe.
5. Small children are at risk of hand, foot and mouth disease, so toys and play areas deserve disinfection.
6. Kitchens used to make food for sale must be extra clean to protect family and customers.
7. CHEMGENE HLD4H is stated to cover norovirus and hand-foot-and-mouth virus, according to product information.
8. According to service information, the space can be used again after about 30 minutes.
9. Older adults weakened by a long flood need a cleaner-than-usual home.
10. Trained technicians plan zones and cover risk spots thoroughly.

Before and After Disinfection: A Post-Flood Home in Ban Ko Sawan

Recovery Checklist for Flooded Homes in Ko Thepho

• Follow Uthai Thani Province and DDPM updates on water levels and routes.
• Have an electrician check wiring before switching on power.
• Prepare boots, rubber gloves, N95 masks and waterproof plasters.
• Throw away food, medicines and drinking water touched by the flood.
• Scrub water jars and tanks before refilling.
• Discard moldy mattresses, rugs and plywood; ventilate and use fans.
• After spraying, re-enter at the time given by technicians.
• Watch children and older adults; see a doctor for fever, diarrhoea or mouth sores.

FAQ: Post-Flood Disinfection in Uthai Thani

Q: Does WHD work in Uthai Thani?
A: WHD is based in Bang Khae, Bangkok. Upcountry jobs are arranged case by case via 065-556-6294 or LINE @whd268, depending on schedule and road conditions. There is no local branch and no same-day guarantee.

Q: Can you spray before the water has fully gone?
A: It is better to wait until the water recedes and sediment is washed out. Disinfection works best on clean, dry surfaces.

Q: How long must we stay out after spraying?
A: According to service information, about 30 minutes, but follow the time the technicians give on the day.

Q: Does the disinfectant cover hand, foot and mouth disease?
A: According to product information, hand-foot-and-mouth virus is on the list, but a child with symptoms still needs a doctor.

Q: After spraying, is jar water safe to drink?
A: No. Spraying treats surfaces, not drinking water. Clean the jars and use boiled or bottled water.

Many Kinds of Germs from Long-Standing Floodwater, and We Help Prevent and Eliminate Them

From sewage bacteria to stomach viruses and hand, foot and mouth virus in children, to mold buried in walls, homes in Ko Thepho that sat in water for weeks deserve complete care. Clean thoroughly, then let the WHD team disinfect with CHEMGENE HLD4H, described as a broad-spectrum disinfectant for viruses, bacteria and fungi, so your family can live at home with confidence again.

Book Post-Flood Disinfection

Call 065-556-6294 | LINE @whd268

Related Links and References

• World Health Disinfection: Disinfection Spraying Service
• CHEMGENE HLD4H disinfectant
• Residential Ozone Disinfection for musty post-flood air
• TNews: Ban Ko Sawan, Ko Thepho, Uthai Thani flooding (5 Oct 2026)
• Government PR Department: flood situation, DDPM data as of 7 Oct 2026
• CDC: Floods
• WHO Fact Sheets
• Department of Disease Control, Thailand