The Situation at Tha Nam Non and Wat Bang Khwang, as Reported

According to Thai PBS at 06.55 on 7 October 2026, the Chao Phraya at Tha Nam Non had risen to watch level, at about 1.80 to 2.30 metres, a yellow-flag level. The municipality was running four water pumps around the clock and had placed sandbags around the pier, while Tha Nam Non and the Wat Bang Khwang community had waterlogging in some spots.

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: Chao Phraya levels rise and fall with tides and upstream flows, and change daily and even hourly. Follow the latest announcements from the municipality, Nonthaburi Province and DDPM.

Flooding in an urban riverside district like Tha Nam Non has its own pattern. Water is not deep everywhere; it pools in patches along sois, car parks, ground-floor shops and homes set below street level. As the river rises, drains empty more slowly or push water back up through manholes and floor drains. Pooled water therefore often contains wastewater from homes, restaurants and markets, which carries more germs than the river itself. Even when it is shallow, repeated flooding with each high tide keeps ground floors and lower walls damp.

Example Case: A Ground-Floor Rice-and-Curry Shop Near Tha Nam Non, Seeping Every Night

Note: this is an example case based on situations that commonly occur in urban riverside districts during high water. It is not the verified account of any specific person.

Auntie Noi has run a rice-and-curry shop on the ground floor of a shophouse near Tha Nam Non for more than twenty years. She lives upstairs with her husband and her primary-school granddaughter. Her customers are ferry commuters, office workers and local students. Every high-water season she stacks sandbags at the door and lifts the freezers onto concrete blocks, but this year the water came harder than expected.

One night after closing, water began bubbling up from the floor drain in the back kitchen, bringing a sewer smell through the whole ground floor. By morning the shop floor had cloudy water almost ankle-deep, with rubbish and grease floating on it. She and her husband squeegeed it out, ran fans and opened for business. The same thing happened on several nights with the tide.

A few days later her granddaughter developed red, irritated eyes, and a small cut on her husband's foot from wading outside the shop became swollen and full of pus. Both saw a doctor, who treated them and advised caution with pooled floodwater, especially water mixed with drain sewage.

After the water dropped, Auntie Noi noticed black spots on the lower walls, a damp smell that survived several rounds of mopping, and rat tracks along the kitchen wall. Worried about a food shop that customers visit every day, she closed for a day, scrubbed the kitchen and floors from scratch, threw out wooden chopping boards and anything that had soaked, and had a professional team disinfect the shop and the living area upstairs before reopening.

Flood Germs at Tha Nam Non and the Wat Bang Khwang Community

Flooding here is urban riverside waterlogging: river water, rainwater and sewage backing up through drains, in an area of markets, restaurants, a busy pier and dense housing. The germs to watch are those from sewage, those spread through food, those passed in crowds, those that enter wounds, and those that grow in damp walls and building water systems. Here are ten groups worth knowing.

1. Leptospira from Market Rats and Drains

How it arrives: rats live in the drains and under stalls of riverside markets and restaurants. When water pushes up from the drains they move onto streets, shops and homes, and their urine, which can carry Leptospira, mixes with pooled water.

Where it hides: back-kitchen floors, under shelving, wall gaps, around manholes and puddles in sois.

Symptoms and who is at risk: sudden high fever, headache, calf pain and red eyes, usually within about 2 to 30 days. Vendors, people wading outside shops and waste collectors face the highest risk. Anyone with fever after wading should see a doctor promptly.

Prevention: rubber boots, covering wounds, sealed food and rubbish containers, and blocking rat entry points.

2. Escherichia coli from Sewage Backing Up Through Drains

How it arrives: with the river high, drains cannot keep up, so wastewater from toilets, kitchens and sewage tanks backs up through floor drains in homes and shops. E. coli signals faecal contamination, and some strains cause severe diarrhoea.

Where it hides: bathroom floors, around floor drains, sinks, kitchen floors and the legs of tables and chairs that sat in water.

Symptoms and who is at risk: diarrhoea, cramps and nausea, sometimes bloody stools. Young children, older adults and people with weak immunity are at greater risk.

Prevention: scrub floors and drains with cleaner, discard food that touched water, wash and disinfect utensils, and wash hands before handling food.

3. Salmonella from Food Stalls and Raw Meat

How it arrives: Salmonella is found in raw chicken, eggs and meat. When water floods market stalls and restaurant kitchens, germs from raw produce and sewage can reach food-preparation surfaces.

Where it hides: chopping boards, knives, counters, freezers that lost power and kitchen floors that were flooded.

Symptoms and who is at risk: fever, diarrhoea, cramps and vomiting within hours to days. Young children, older adults and pregnant women are at greater risk.

Prevention: discard fresh food from freezers that were off for long, separate raw and cooked boards, and cook food thoroughly.

4. Giardia lamblia, a Waterborne Parasite Behind Lingering Diarrhoea

How it arrives: Giardia is a single-celled parasite found in water contaminated with human or animal faeces. When drains back up and pooled water mixes with sewage, uncovered tanks and containers can be contaminated.

Where it hides: water tanks, cups, utensils washed in unsafe water, and hands that touched floodwater.

Symptoms and who is at risk: watery diarrhoea, bloating, cramps and foul-smelling stools that can last weeks. Young children are most at risk; see a doctor if diarrhoea persists.

Prevention: boiled or bottled water, handwashing with soap, and cleaning water tanks after the flood.

5. Adenovirus, a Common Cause of Post-Flood Pink Eye

How it arrives: conjunctivitis is common during floods and is mostly viral, often adenovirus. It spreads through tears, eye discharge, hands that rub eyes and dirty water splashing into the eyes. At a busy pier where many people touch the same rails and seats, it spreads fast.

Where it hides: handkerchiefs, towels, pillows, door handles, rails, phones and remote controls.

Symptoms and who is at risk: red, watery, gritty eyes with discharge, sometimes fever or sore throat. School-age children catch it easily and bring it home. See a doctor for blurred vision or severe pain.

Prevention: do not rub eyes, wash hands often, do not share towels or pillows, and clean shared touch points at home.

6. Influenza Viruses and RSV in the Rainy Season and Crowds

How it arrives: the rainy season is already peak time for flu and RSV. Floods push people into the remaining dry spaces, ferry queues and shared upstairs rooms, and tired, often-soaked bodies catch infections more easily.

Where it hides: rails, door handles, tables, children's toys, shared cups and droplets from coughs and sneezes.

Symptoms and who is at risk: fever, cough, sore throat, runny nose and body aches. Babies, small children, older adults and people with lung or heart disease risk severe illness; breathlessness needs a doctor at once.

Prevention: masks in crowded places, frequent handwashing, separating a sick person's items, and asking a doctor about flu vaccination.

7. Legionella pneumophila in Idle Building Water Systems

How it arrives: Legionella grows in warm, still water in pipes, storage tanks, cooling towers and shower heads. When buildings, condos or shops near the pier close or stop using water during a flood, water sits in the pipes and the bacteria can multiply.

Where it hides: unused shower heads, rooftop tanks, water heaters and large air-conditioning systems.

Symptoms and who is at risk: infection comes from breathing in contaminated water droplets and causes pneumonia-like illness with fever, cough and breathlessness. Older adults, smokers and people with chronic disease are most at risk.

Prevention: flush all taps on reopening as the building manager advises, clean shower heads and tanks, and have air-conditioning checked before use.

8. Staphylococcus aureus and Wounds from Wading in the City

How it arrives: many people carry this bacterium harmlessly on skin and in the nose. But cuts from glass, manhole edges or kerbs hidden under murky water, then exposed to dirty water, let it cause infection, and some strains are drug-resistant.

Where it hides: shared towels, footwear, rails and surfaces touched by wounds or pus.

Symptoms and who is at risk: swollen, red, hot, painful wounds with pus, boils or spreading skin infection. People with diabetes and older adults heal slowly; see a doctor if redness spreads or fever appears.

Prevention: closed-toe shoes, rinsing wounds with clean water at once, covering them, not sharing towels and not squeezing pus.

9. Candida and Dermatophytes in Damp Skin Folds

How it arrives: people who wade to work or stand all day in shops with wet floors keep their feet, toes and groin damp. Candida yeast and dermatophyte fungi thrive in those conditions.

Where it hides: wet shoes and socks, towels, doormats and bathroom floors.

Symptoms and who is at risk: itchy red rashes, white soggy skin, cracked toe webs and flaky skin. People with diabetes, higher body weight or long hours in boots are at greater risk.

Prevention: dry socks and shoes, drying skin folds after showering, not sharing towels, and seeing a doctor if a rash spreads.

10. Molds on Walls and Ceilings: Aspergillus, Cladosporium and Black Mold (Stachybotrys)

How it arrives: in shophouses and ground-floor homes flooded again and again with the tide, concrete wicks moisture well above the water line. According to CDC guidance, mold can grow within 24 to 48 hours of materials getting wet, and humid riverside air slows drying.

Where it hides: lower walls, skirting, behind cabinets, under kitchen counters, leaking ceilings and cardboard boxes on the floor.

Symptoms and who is at risk: sneezing, blocked nose, coughing, asthma flare-ups and irritated eyes and skin. Allergy sufferers, older adults, small children and people with weak immunity are at greater risk.

Prevention: discard moldy cardboard, rugs and porous items, scrub hard surfaces wearing an N95 mask, ventilate, and never paint before walls are fully dry.

This is general information, not a diagnosis. Anyone with fever, ongoing diarrhoea, severe red eye, an inflamed wound or breathing difficulty after flood exposure should see a doctor and mention the exposure.

Linking Tha Nam Non's Flood Germs to Cleaning and Disinfection Spraying

WHO and the CDC advise cleaning flooded surfaces first and disinfecting second, because mud, grease and grime shield germs. The order is: remove pooled water and rubbish, scrub with water and detergent, let surfaces dry, then spray disinfectant on every surface, especially kitchens, bathrooms and high-touch points.

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 across homes, shops and buildings.

According to WHD product and service information, the disinfectant is stated to cover a range of viruses, bacteria and fungi. The listed organisms include influenza H1N1 and H5N1, RSV, Salmonella, norovirus, hand-foot-and-mouth virus, COVID-19 and fungi, with the service page stating 99.99% efficacy. For the other organisms here, such as Leptospira, E. coli, adenovirus, Legionella, Staphylococcus aureus, Candida, dermatophytes and the individual mold genera, 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 for test data on a particular organism.

Giardia is a parasite and is not among the groups the product lists; the key protection is safe water and handwashing. Legionella in plumbing needs the building's water system to be managed by its operator. Surface spraying does not replace water-system care or medical treatment.

What Homes and Shops Around Tha Nam Non Face If They Skip Disinfection

• Health: repeated diarrhoea, pink eye, infected wounds and allergy flare-ups.
• Business: food shops and stalls that are not properly cleaned risk making customers ill and losing their reputation.
• Money: medical bills, replacing materials that keep growing mold, and income lost to repeated closures.
• Building: damp climbing the walls blisters paint, weakens plaster and leaves a lasting smell.

Why Squeegeeing and Mopping Are Not Enough at Tha Nam Non

Urban floodwater carries sewage. Water from backed-up drains holds far more faecal germs than rainwater, so mopping with plain water is not enough for kitchens and bathrooms.

Flooding repeats. When water rises and falls over several nights, germs keep coming back. The final clean after the water truly recedes must be thorough and complete.

Bleach has limits. It is easy to get the strength wrong, it corrodes kitchen metal, and it must never be mixed with some bathroom cleaners.

Shared touch points get forgotten. Stair rails, door handles, freezer doors and the cashier counter pass germs from person to person easily.

WHD's Post-Flood Disinfection Spraying Process for Homes and Shops Near Tha Nam Non

WHD is based in Bang Khae, Bangkok 10160. Nonthaburi is in the Bangkok metropolitan region, and jobs are booked by phone or LINE according to the schedule. There is no Nonthaburi branch and no same-day guarantee. The main steps are:

1. Survey and assessment: send photos, floor area and post-flood condition via LINE @whd268 or call 065-556-6294.
2. Clean first: remove pooled water and rubbish, discard soaked materials, scrub surfaces and let them dry.
3. Zoning: kitchen, bathroom, shopfront, living area and shared touch points, so nothing is missed.
4. Spraying: according to service information, technicians spray and/or ULV-fog with CHEMGENE HLD4H. People and pets leave each zone, and food and utensils should be stored away.
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. Anyone who is ill should also see a doctor.

10 Reasons Chao Phraya Riverside Homes and Shops in Nonthaburi Should Be Disinfected

1. Urban pooled water mixes with drain sewage and carries heavy faecal contamination.
2. Markets and restaurants attract rats, raising leptospirosis risk on surfaces.
3. Food shops must protect the customers who come through every day.
4. ULV fine-mist spraying reaches under counters, behind freezers and into hard-to-wipe corners.
5. Busy piers spread flu and pink eye through shared touch points.
6. CHEMGENE HLD4H is stated to cover influenza, RSV and Salmonella, according to product information.
7. According to service information, clients include hospitals, schools, malls, offices and residential buildings.
8. According to service information, the space can be used again after about 30 minutes, so shops close only briefly.
9. A tax invoice is available for businesses, according to service information.
10. Trained technicians plan zones and cover risk spots thoroughly.

Before and After Disinfection: A Shophouse Near Tha Nam Non

Recovery Checklist for Homes and Shops at Tha Nam Non

• Follow Chao Phraya levels and municipal and provincial announcements.
• Switch off ground-floor power before water enters, and have it checked before use.
• Wear boots and rubber gloves and cover wounds before wading.
• Discard food touched by water or kept in freezers that lost power for long.
• Scrub floors, drains and counters, then let them dry.
• Flush taps and clean shower heads before use.
• After spraying, re-enter at the time given by technicians.
• See a doctor for fever, diarrhoea, severe red eye or an inflamed wound.

FAQ: Post-Flood Disinfection in Nonthaburi

Q: Does WHD cover the Tha Nam Non area?
A: WHD is based in Bang Khae, Bangkok, and books Nonthaburi jobs via 065-556-6294 or LINE @whd268 according to schedule. There is no local branch and no same-day guarantee.

Q: The water was only ankle-deep. Is disinfection necessary?
A: Depth is not the only factor. Shallow water from backed-up drains often contains sewage, so clean thoroughly and consider disinfection, especially for kitchens and bathrooms.

Q: How long must a restaurant close?
A: According to service information, about 30 minutes after spraying, but follow the technicians' time, and keep food and utensils covered during treatment.

Q: Does the disinfectant cover influenza?
A: According to product information, influenza H1N1 and H5N1 and RSV are on the list.

Many Kinds of Urban Flood Germs, and We Help Prevent and Eliminate Them

From sewage bacteria backing up through drains and germs from market rats, to flu and pink-eye viruses in crowds and mold climbing the walls, homes and shops around Tha Nam Non and the Wat Bang Khwang community 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 families and customers can use the space with confidence.

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
• Thai PBS: Chao Phraya at Tha Nam Non reaches watch level (7 Oct 2026)
• Government PR Department: flood situation, DDPM data as of 7 Oct 2026
• CDC: Floods
• WHO Fact Sheets
• Department of Disease Control, Thailand