Flooding in Ko Yom and Bang Prong, According to the Government Public Relations Department

According to the Government Public Relations Department (PRD) on 30 September 2026, the Chao Phraya River overflowed into the Ko Yom and Bang Prong communities in Nakhon Sawan City Municipality from the early morning. Water at some points rose above 50 centimetres, dozens of homes were affected, and residents asked for tents so that older people and bedridden patients could stay somewhere dry while their homes were flooded. This reflects the situation on the reporting date; river levels change daily with upstream flows and water management, so follow Nakhon Sawan City Municipality and provincial announcements closely.

Nationally, figures from the Department of Disaster Prevention and Mitigation, published by PRD as of 06:00 on 7 October 2026, showed flooding affecting 27 provinces plus Bangkok, 123 districts, 984 subdistricts, 1,154,875 households and more than 3.1 million people. The numbers change daily, but they show how widespread the 2026 floods were, and riverside communities like Ko Yom and Bang Prong are among the first to face the water.

River flooding differs from street flooding in town. Overflowing river water carries silt, mud and whatever the current picks up straight into homes: wood, rubbish, plant debris, animal droppings and the contents of septic tanks pushed up by the rising water. Raised wooden houses may stay dry, but single-storey homes, concrete ground floors and the open space beneath stilt houses fill with mud. When a household includes older people or bedridden patients, germ risks multiply, because these residents have weaker immunity, move little, and may have pressure sores or medical devices.

Example Case: A Riverside Family Who Moved a Bedridden Grandmother into a Tent

Note: this is a typical scenario compiled from situations commonly seen in riverside communities after the river overflows. It is not the account of any specific customer or resident.

Tom lives with his mother, nearly eighty, in a part-wood, part-concrete house beside the Chao Phraya. She has been bedridden for years after a stroke and also has diabetes. Before dawn that day, the sound of water rushing beneath the house woke him. Within hours, murky brown water reached the ground floor where his mother sleeps. He and his neighbours lifted her, air mattress and all, onto a pickup and took her to a tent the community had set up on higher ground. Her medicine cabinet, adult nappies, bedsheets and commode chair were left behind under water.

Days later the water receded, leaving thick mud on the floor, a tide line almost knee-high on the walls, a musty smell mixed with sewage, and black mould spots on the wooden panels. Tom wanted to bring his mother home quickly, because the tent was uncomfortable and a pressure sore on her lower back was turning red. Yet he worried that if her room still held germs from mud and wastewater, the sore could become infected, or mould in the house could trigger pneumonia.

He contacted WHD on LINE. The team advised the correct order: shovel out the mud, discard mattresses, fabrics and soaked materials, scrub floors and walls, open the house to dry, and then book spraying for the whole ground floor, especially his mother's room, the bathroom and the space under the house. During spraying everyone stayed outside and returned when the technician said so. Only after refurnishing the room with a clean mattress and sheets did Tom bring his mother home. Many riverside families in Nakhon Sawan face the same situation after the water drops.

Why Older and Bedridden Residents in Ko Yom and Bang Prong Face Higher Risk

Immunity declines with age, and many older people live with diabetes, kidney disease, heart disease or chronic lung disease, which make it harder to fight infection. Bedridden patients face extra risks: pressure sores open a door for germs, long periods lying down let phlegm build up and raise pneumonia risk, catheters and feeding tubes can become infected, and caregivers who touch both contaminated surroundings and the patient can carry germs from floor to bedside.

Temporary tents and shelters keep people out of the water but are often crowded, hot and humid, with few toilets and limited food storage, which helps respiratory and stomach infections spread. Preparing the home properly before bringing older relatives back is not a step to rush.

Flood Germs in Ko Yom and Bang Prong, Nakhon Sawan: Ten to Know Before Bringing Elders Home

Chao Phraya floodwater is a mix of river water, silt, mud, septic overflow and floating debris, so the germs that follow include soil bacteria, freshwater bacteria, viruses and fungi. This is general prevention information, not treatment advice. If an older person or anyone in the household feels unwell, see a doctor and mention floodwater contact.

1. Burkholderia pseudomallei and Melioidosis in Riverbank Mud

How floods spread it: this bacterium lives in soil and surface water in Thailand. Floods carry mud into homes, and people wading or shovelling mud bare-handed can be infected through wounds, by inhaling spray or dust, or by swallowing contaminated water. Where it hides afterwards: mud under stilt houses, garden soil, piles of shovelled mud and boots used for cleanup. Symptoms and risk groups: prolonged high fever, cough, pneumonia and abscesses; people with diabetes or kidney disease and older adults face particularly severe illness. Prevention: always wear boots and rubber gloves for mud removal, cover wounds, wear a mask when hosing mud, and see a doctor about any lasting fever after mud contact, especially if diabetic. It belongs to the bacteria group WHD's product information says it covers in general; no specific test result is listed, so ask WHD for data.

2. Leptospira and Leptospirosis from River Water and Mud

How floods spread it: rats and other animals fleeing the water onto houses and high ground shed the bacteria in urine; it mixes into water and mud and enters through wounds or soaked skin. Where it hides: damp mud on floors, under houses, rubbish piles, storerooms and shoes. Symptoms and risk groups: sudden high fever, headache, severe calf pain and red eyes, sometimes with kidney or liver complications; people shovelling mud for days and those with foot wounds are most at risk. Prevention: wear boots and gloves, cover wounds, wash with soap after wading, clear rubbish to deter rats, and see a doctor at once for fever. It is within the bacteria group the product says it covers in general, with no specific listed result.

3. Aeromonas hydrophila, a Freshwater Bacterium That Targets Wounds

How floods spread it: Aeromonas is common in rivers and fresh water. When the Chao Phraya enters a home, people with wounds who wade, or who are cut by floating wood, can be infected. Where it hides: water left in jars and buckets, puddles under the house and surfaces still wet. Symptoms and risk groups: wounds that swell, redden, hurt badly and spread quickly, or diarrhoea after swallowing contaminated water; people with diabetes or liver disease and older adults are most at risk. Prevention: avoid wading with open wounds, rinse wounds with clean water at once, and see a doctor if redness spreads. It belongs to the bacteria group the product says it covers in general; ask WHD for specific data.

4. Clostridium tetani and Tetanus from Soil and Debris

How floods spread it: tetanus spores live in soil and dust. People clearing mud, wood, nails and corrugated sheets carried by the flood can get deep puncture wounds that let spores in. Where it hides: mud, soil, rotting wood, and rusty nails and metal. Symptoms and risk groups: muscle stiffness and spasms, including a locked jaw; older adults without booster vaccination and cleanup workers are most at risk. Prevention: wear thick-soled boots and heavy gloves, clean wounds well, and ask a doctor about tetanus vaccination after any dirty wound. Some bacterial spores are highly resistant to common disinfectants, so protective gear, wound care and vaccination are the main defences; spraying is only a supporting surface step.

5. E. coli (Escherichia coli) from Overflowing Septic Tanks

How floods spread it: when water rises above half a metre, riverside septic tanks and toilets are often pushed to overflow, spreading E. coli, the classic marker of faecal contamination, through the house. Where it hides: bathroom floors, ground-floor bedrooms, commode chairs, water containers and gaps between floorboards. Symptoms and risk groups: diarrhoea and cramps, and for bedridden patients with urinary catheters, a higher risk of urinary tract infection; older adults and young children risk dehydration. Prevention: have the septic tank inspected and pumped after the flood, discard contaminated food and water, and wash hands before caring for a patient. E. coli is within the bacteria group the product says it covers in general, without a specific listed result.

6. Klebsiella pneumoniae and Pneumonia Risk in Older Adults

How floods spread it: Klebsiella lives in the gut, soil and water. When a home is contaminated and caregivers touch both dirty surfaces and the patient, it can reach a bedridden person. Where it hides: bed rails, suction equipment, water containers, sinks and towels. Symptoms and risk groups: fever, productive cough, breathlessness or urinary infection; bedridden patients, people with tubes or catheters and people with diabetes are most at risk. Prevention: wash hands before and after care, clean medical equipment as nurses advise, and see a doctor if a patient develops fever or abnormal breathing. It belongs to the bacteria group the product says it covers in general.

7. Norovirus in Crowded Tents and Shelters

How floods spread it: with few toilets and little handwashing in temporary tents, norovirus moves quickly through hands, food and shared surfaces, and can come home with returning families. Where it hides: door handles, rails, taps, toilets and food containers. Symptoms and risk groups: sudden vomiting and diarrhoea; older adults risk dehydration. Prevention: wash hands with soap and water, separate sick people and clean shared touch points often. According to WHD's product information, norovirus is one of the organisms CHEMGENE HLD4H is stated to cover.

8. Influenza Virus, a Threat to Older Adults During Floods

How floods spread it: exhaustion, nights in tents, damp air and several families sharing space help flu spread through droplets and hands. Where it hides: bed rails, cups, phones, remote controls and tables. Symptoms and risk groups: high fever, aches, cough and sore throat; older adults and people with chronic illness risk pneumonia. Prevention: wear a mask when sick, wash hands, keep sick people away from elders and ask a doctor about annual vaccination. According to WHD's service and product information, influenza H1N1 and H5N1 are stated to be covered.

9. Candida in the Skin Folds of Bedridden Patients

How floods spread it: high post-flood humidity, nappies that cannot be changed often enough during evacuation and hot, stuffy tents leave skin folds, groins and the area under the breasts damp, where Candida thrives. Where it hides: mattresses, sheets, towels and damp nappies. Symptoms and risk groups: red, itchy, stinging rashes with small spots at the edges; bedridden patients, people with diabetes and nappy users are most at risk. Prevention: change nappies often, clean and pat skin dry, use clean dry bedding and see a doctor if a rash spreads. According to the service information, fungi are a group the service is stated to cover.

10. Mould in Riverside Wooden Homes: Stachybotrys, Aspergillus and Penicillium

How floods spread it: wooden houses and plywood panels soaked in river water hold moisture for a long time. If they do not dry within 24 to 48 hours, moulds grow; Stachybotrys, the so-called black mould, favours wet cellulose such as plywood, paper and gypsum. Where it hides: lower wooden walls, under floorboards, behind cabinets, mattresses and pillows, curtains and document chests. Symptoms and risk groups: stuffy nose, cough, breathing difficulty and eye or skin irritation; older adults, bedridden patients, people with lung disease and those with weak immunity face serious respiratory problems. Prevention: dry the house fast, discard mouldy mattresses and materials, scrub mould wearing protective gear before disinfecting, keep elders out during cleanup, and consider ozone treatment for musty closed rooms. According to WHD's service information, fungi are among the groups the spraying service is stated to cover.

How Cleaning and Spraying Work Together in Riverside Nakhon Sawan Homes

WHO and the US CDC advise removing mud and cleaning surfaces first after a flood, then disinfecting. Absorbent items that cannot be cleaned, such as mattresses, carpets and swollen plywood, should be discarded, and homes dried within 24 to 48 hours to limit mould. Thailand's Department of Disease Control also urges vigilance for leptospirosis, melioidosis, diarrhoeal disease and skin infections after floods.

According to WHD's product and service information, CHEMGENE HLD4H is stated to cover organisms including norovirus, influenza H1N1 and H5N1, RSV, COVID-19, human coronavirus 229E, hand, foot and mouth disease virus, Salmonella, Bordetella pertussis, mycobacteria, and bacteria and fungi in general, with the service page claiming 99.99%. Organisms not on that list, such as Burkholderia, Leptospira, Aeromonas, E. coli or Klebsiella, should be treated as members of the bacteria group the product says it covers; ask WHD for organism-specific data. Tetanus spores depend mainly on protective gear, wound care and vaccination. Spraying is the final step after mud removal, washing and drying, never a replacement for them or for medical care.

WHD's Post-Flood Spraying Process for Ko Yom and Bang Prong Homes

According to the service information, WHD's trained technicians spray and/or ULV-fog (Ultra Low Volume fine mist) CHEMGENE HLD4H, a medical-grade UK disinfectant containing benzalkonium chloride and didecyldimethylammonium chloride. The service page cites the Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019. The usual steps:

1. Survey: send photos of the house, flood line, the patient's room, bathroom and the space underneath by phone or LINE.
2. Mud removal and washing first: shovel out mud, discard mattresses, carpets and soaked materials, scrub floors, walls and the under-house area, and dry the house as far as possible.
3. Zoning: separate the patient's room, living area, kitchen, bathroom and under-house space.
4. Everyone leaves the zone: older adults, bedridden patients, children and pets stay out; medicines, food and medical equipment are stored safely.
5. Spraying: floors, lower walls, furniture, beds, rails and hidden corners.
6. Re-entry: per the service information, wait about 30 minutes, following the technicians' timing; ventilate well before a bedridden patient returns, and set up a clean, dry mattress.

WHD is based in Bang Khae, Bangkok 10160, with no branch in Nakhon Sawan. Provincial jobs are arranged by phone and LINE according to the schedule, so book ahead. Pricing depends on size and condition. The service information lists a free CHEMGENE spray bottle and WELLGIENIC wet tissues, and tax invoices are available. Customers include hospitals, schools, malls, airports, offices, airlines, banks and residential buildings.

10 Reasons Riverside Homes in Ko Yom and Bang Prong Should Disinfect Before Elders Return

1. Overflowing river water carries mud and soil germs such as Burkholderia straight indoors.
2. Septic overflow spreads faecal germs across the ground floor.
3. Older and bedridden residents have weaker immunity and suffer more severe infections.
4. The WHD disinfection spraying service uses a medical-grade product stated to cover viruses, bacteria and fungi.
5. Fine mist reaches floorboard gaps, under beds and corners a cloth cannot.
6. It helps reduce mould in damp wooden homes that affects patients' breathing.
7. About 30 minutes of waiting, per the service information.
8. Trained technicians advise how to handle rooms with patient-care equipment.
9. EN 14476 and the Department of Medical Sciences are cited in the service information.
10. It completes home recovery, helping you prevent and eliminate post-flood germs before your loved ones sleep at home again.

Before and After Spraying

Recovery Checklist for Homes with Older Residents in Nakhon Sawan

• Keep elders and bedridden patients somewhere safe until the house is clean and dry.
• Switch off ground-floor power and have an electrician check it.
• Wear boots, heavy rubber gloves and a mask while removing mud.
• Discard mattresses, pillows, carpets, nappies and medicines touched by floodwater, and ask a pharmacist or doctor about replacements.
• Scrub floors, walls, the under-house area, beds and rails.
• Have the septic tank checked and pumped before normal toilet use.
• Clean water jars and tanks, and use safe drinking water.
• Ventilate and dry within 24 to 48 hours.
• Book WHD spraying and keep everyone out of the sprayed zone.
• Watch for fever, calf pain, cough, breathlessness, red swollen wounds or diarrhoea, and see a doctor promptly.

FAQ: Post-Flood Disinfection in Nakhon Sawan

Q: Can a wooden house soaked by the river be sprayed?
A: Yes, after mud removal and washing, and once the wood is as dry as possible. Badly swollen or mouldy wood may need repair or replacement.

Q: When can a bedridden patient return to the room?
A: The service information says about 30 minutes, but follow the technicians' timing, ventilate well, and set up clean, dry bedding first.

Q: Does the product cover melioidosis or leptospirosis?
A: Both are bacteria, within the group the product says it covers in general, but no specific test result is listed. Ask WHD for data; protective gear during mud removal matters most.

Q: Is there a branch in Nakhon Sawan?
A: No. WHD is in Bang Khae, Bangkok. Provincial jobs are booked via 065-556-6294 or LINE @whd268, subject to scheduling.

Q: Will spraying heal a pressure sore?
A: No. Spraying treats surfaces, not wounds or illness. Red, swollen or pus-filled sores need a doctor or nurse.

Q: Is there zero residue?
A: We make no such claim. Ventilate and wipe food-contact surfaces as advised.

Let WHD Help Prevent and Eliminate Post-Flood Germs Before Your Elders Come Home to the Riverside

Whether your home is in Ko Yom, Bang Prong or another Chao Phraya riverside community in Nakhon Sawan City Municipality, once the mud is out and cleaning is done, WHD's disinfection spraying service is the final step that helps prevent and eliminate the germs floodwater left behind, so your home is ready to welcome your loved ones back more safely.

Book Post-Flood Disinfection Spraying

Call 065-556-6294 | LINE @whd268

Related Links

• WHD Disinfection Spraying Service
• CHEMGENE HLD4H Disinfectant
• Residential and Building Ozone Disinfection for musty odours

References

• Government Public Relations Department (30 September 2026), Chao Phraya overflow into Ko Yom and Bang Prong communities, Nakhon Sawan: https://www.prd.go.th/th/content/category/detail/id/33/iid/546736
• Government Public Relations Department, citing DDPM data as of 06:00, 7 October 2026: https://www.prd.go.th/th/content/category/detail/id/33/iid/548715
• CDC, Floods: https://www.cdc.gov/floods/
• World Health Organization, Fact sheets: https://www.who.int/news-room/fact-sheets
• Department of Disease Control, Thailand: https://ddc.moph.go.th/