A typical scenario (an illustrative example, not a statement from any real resident)

Auntie Sri is in her sixties and has lived in the same two-storey house beside a canal in Ban Sang since she married. The ground floor is concrete and holds the kitchen, the dining area and the bed of her husband, who can no longer manage the stairs easily. The upper floor is all timber, with a bedroom for two grandchildren whose parents work shifts at an industrial estate. Every rainy season, water creeps into the yard for a few days and then drains away, so she assumed this year would be the same.

This year was different. News on her phone said water from the provincial town and from Si Maha Phot was on its way. The canal crept up hour by hour until one day it crossed the threshold into the kitchen. She and the grandchildren carried the rice cooker, the gas cylinder and the sack of rice upstairs, and dragged her husband's mattress up even though half of it was already wet. In the end her son took his father, who has a long-term illness, to an evacuation shelter, while Auntie Sri stayed upstairs to watch the house.

When the water finally went down, the house did not go back to normal. A brown tide line ran across the ground-floor walls, the wooden food cabinet had swollen so its doors no longer closed, and her husband's mattress was spotted with black. She scrubbed the floor twice with washing powder, but the smell stayed. Then her son called to say the doctor was happy for his father to come home. The question she could not answer was simple: is a house that smells like this safe enough for a sick man to sleep in?

Where the Flood Hit in Ban Sang, Prachinburi: What the Reports Say

The facts in this section come only from the Matichon report of 2 October 2026. We have not added numbers or events that do not appear in that report, and the situation changes every day, so please follow announcements from the district office, local authorities and disaster agencies.

• Where the water came from: floodwater from Mueang Prachinburi and from Si Maha Phot district flowed down and converged on Ban Sang.
• How widespread: the water level rose and floodwater was standing in every subdistrict of Ban Sang district.
• Evacuation: residents had begun moving into 13 evacuation shelters, with 69 people recorded at the time of the report.

The key point is that this is standing water in a downstream, low-lying area, not a flash flood that rushes through and drains within hours. When water from several directions gathers in one place, it rises slowly and takes a long time to drain. A house that sits in water for days builds up far more trapped moisture than one that flooded for an afternoon.

Nationally, the Department of Disaster Prevention and Mitigation (DDPM) reported at 06:00 on 5 October 2026, as covered by Daily News, that floods were affecting 26 provinces plus Bangkok, a total of 1,270,151 households and 3,519,416 people. The Office of the National Water Resources (ONWR) also warned of heavy rain and flash floods from 5 to 7 October in the north and parts of the south, according to Thai PBS. All of these figures were correct at the time of reporting and may already have changed.

What Days of Standing Water Leave Inside a Ban Sang Home

Downstream floodwater is not the same as clean rain. Water that has travelled through a town, villages, rice fields, animal pens and drainage systems picks up contamination all along the way: overflow from drains, septic tanks and latrines, animal waste, fertiliser and farm chemicals, household rubbish and rotting plants. When that water stops moving and sits inside a house for days, the contamination has plenty of time to soak into every material it touches.

Homes in Ban Sang vary a lot, from traditional raised timber houses near the water, to half-timber houses with a concrete ground floor, to single-storey concrete homes and townhouses for families who work in nearby factories. Each type has its own problems.

• Raised timber houses: the water may never reach the living floor, but the space underneath becomes a reservoir of mud, moisture and smell that rises through gaps in the floorboards. Timber posts soaked for days wick water well above the flood line.
• Half-timber houses: the concrete ground floor is usually the kitchen and the bedroom of an older relative. Anything not lifted in time is soaked, and the concrete walls hold moisture and release it slowly for weeks.
• Single-storey concrete homes: there is nowhere to move belongings, so mattresses, wardrobes, sofas and appliances all go under at once.

Every Kind of Germ the Ban Sang Flood Can Bring: Bacteria, Viruses, Mold and Odour

1. Bacteria from sewage and waste

E. coli lives in the gut of people and animals. When septic tanks and toilets overflow, it spreads through the water and is left on floors, kitchen counters, plates and children's toys. Eating with unwashed hands can lead to diarrhoea and stomach cramps, and some strains cause more serious illness.

Salmonella often comes from animal waste and contaminated food. In villages where chicken, duck or pig pens sit close to houses, as they do in many parts of Ban Sang, floodwater can carry it straight into the home. Common symptoms are fever, diarrhoea and vomiting.

Leptospira causes leptospirosis, known in Thai as rat urine disease. It lives in the urine of rats and some other animals and enters the body through cuts or skin that has been soaked for a long time. People who wade through water for days are at risk. Watch for sudden high fever, headache and marked pain in the calf muscles. Anyone with these symptoms after wading should see a doctor quickly and mention the flood exposure. The Department of Disease Control repeats this warning every flood season.

2. Viruses that spread when people crowd together

Norovirus and rotavirus are gut viruses spread through water, food and contaminated surfaces. Norovirus survives well in the environment and only a small dose is needed to cause illness. Rotavirus is a major cause of diarrhoea in young children. Both cause vomiting and watery diarrhoea and can dehydrate children and older people quickly.

RSV and influenza are respiratory viruses that spread easily in damp weather and in crowded, enclosed spaces such as shelters or homes where several related families are staying together. When people return home, these viruses can travel with clothing, blankets and bags. Young children and older adults are most likely to become seriously ill.

3. Mold that grows with moisture

Mold is the biggest long-term problem in homes that sat in water. WHO and the CDC both advise cleaning and drying within 24 to 48 hours after floodwater recedes to limit mold growth. Homes in Ban Sang, where water stood for days, often cannot meet that window because they must wait for the water to go. By then spores are already growing on walls, door frames, under cupboards, on mattresses and on curtains.

Mold is not just an ugly black stain. Airborne spores trigger allergies, causing a blocked nose, sneezing, a lingering cough, red eyes and skin rashes, and they can set off asthma attacks. For people with weakened immunity, such as those having chemotherapy, people with kidney disease or frail older adults with chronic illness, long exposure to some molds can lead to lung infections.

4. Musty, muddy and sewage odours

The smell after a flood is a blend: musty odour from growing mold, earthy smell from silt in floor joints, rotting smells from plants and spoiled food, and drain smell from sewage that seeped in. These odour molecules cling to fabric, wood, sofa foam and porous walls. Air freshener and incense only cover them for a while. A lingering musty smell is a sign that moisture and a source of germs are still present.

Who is most at risk

• Older adults and bedridden patients, whose immunity is lower and who spend most of the day in one room.
• Young children, who crawl on floors and put things in their mouths.
• Pregnant women, for whom gut infections and dehydration affect both mother and baby.
• People with chronic illness such as diabetes, kidney or lung disease, and people with allergies or asthma.

What Families in Ban Sang Face After the Water Goes Down

Health: the most common complaints after moving back are coughing, sneezing, a blocked nose, itchy skin, diarrhoea and poor sleep because of the smell. Many families put it down to tiredness from cleaning, but if symptoms do not improve after several days, the air inside the house may still be the problem, and a doctor should be consulted.

Money: the cost of a flood is not only repairs. There are new mattresses, clothes and appliances, medical bills, and income lost from rice fields or from days off work. If mold returns after repairs, the money spent on paint or new materials is wasted.

Family: in many Ban Sang households, the younger generation works at industrial estates or in Bangkok, so much of the cleaning falls on older relatives at home. The worry about whether the house is safe for a sick parent or a small grandchild builds up and wears the whole family down.

Why the Usual Fixes Fall Short in Homes That Stood in Water

Bleach alone: bleach can disinfect smooth surfaces once the mud is off, but it works poorly on surfaces still coated in silt and cannot reach germs deep inside timber, plaster or foam. Never mix bleach with toilet cleaners or ammonia, because that releases toxic gas.

A fan and patience: fans dry the surface, but moisture inside walls and floorboards remains, and the moving air spreads mold spores around the house.

Air freshener or incense: pleasant smells cover the problem briefly but do nothing about the cause. When the fragrance fades, the musty smell comes back.

Painting over mold: one of the most common mistakes. New paint hides stains for a few weeks, then mold pushes through underneath, making the paint bubble and peel.

None of this means those steps are useless. Mud removal, washing, surface disinfection and drying remain essential. But homes that stood in water for days usually need an extra step that deals with germs and odour in the air and the places hands cannot reach. That is where ozone treatment helps.

Ozone Disinfection in Ban Sang With WHD: How It Works Once the House Is Clean and Dry

Ozone (O3) is oxygen with three atoms, and it is a strong oxidiser. When a controlled amount of ozone is released into a sealed room, it spreads through the whole space, including corners, the underside of furniture and fabric, and breaks down the structure of viruses, bacteria and mold, as well as the molecules that cause odour. Afterwards it reverts to ordinary oxygen (O2), leaving no chemical residue on surfaces.

According to company-certified test results from Thailand's Department of Medical Sciences and Intertek (UK), World Health Disinfection (WHD) ozone treatment eliminates viruses, bacteria and mold at 99.99%. You can review the documents on our certification page.

Service steps

1. Consultation and assessment: tell us the size of the house, the number of rooms, how high the water came and the current condition, by phone or LINE, with photos.
2. Preparation: confirm the mud is out, the house is washed and rooms are dry enough. Close doors and windows, and take all people, pets and plants out.
3. Ozone release: the technician sets up the equipment and fills each zone with ozone.
4. Contact time: the ozone works on germs and odours for the set period. A typical cycle takes about 30 minutes per zone.
5. Rest and ventilation: the ozone is allowed to break down and the space is aired as the technician directs, before anyone goes back in.

The essential rule: ozone treatment is carried out in an empty, closed space with no people, pets or plants inside, and people return only after the rest and ventilation period. Concentrated ozone irritates the airways, so it must be handled by trained staff.

What ozone does not do: it does not replace mud removal, washing, drying or medical care. If walls are still wet or silt is still thick, deal with that first. Anyone in the house with fever, calf pain, diarrhoea or breathing problems must see a doctor.

Service in Ban Sang and Prachinburi

WHD is based in Bang Khae, Bangkok 10160, and has no branch in Prachinburi. Service in Ban Sang and nearby areas is arranged by phone on 065-556-6294 or LINE @whd268. Our team confirms travel, coverage and timing when you get in touch. We cannot promise same-day arrival, especially while some roads remain flooded. We recommend contacting us once it is clear the water is going down for good, and continuing to clean and air the house in the meantime.

Promotion: ozone jobs of 15,000 baht or more receive a free medical-grade disinfectant spray. See also our ozone cleaning service.

10 Reasons Ban Sang Homes Should Consider Ozone After the Flood

1. Water stood longer than usual, so moisture soaked deeper and mold had more time to grow. Post-flood ozone disinfection reaches what scrubbing misses.
2. The water came from several sources, passing through towns, villages and fields, so it carried several groups of germs at once.
3. Ozone is a gas, so it reaches corners, behind cupboards, under beds and between floorboards.
4. It breaks down odour at the source instead of masking it with fragrance.
5. No chemical residue, because ozone returns to oxygen, which suits bedrooms for children and older adults.
6. It helps prepare a room for a patient coming home from a shelter or hospital.
7. It reduces airborne mold spores once cleaning and drying are done, easing a key allergy and asthma trigger.
8. It is quick per zone, about 30 minutes per cycle, so rooms can be treated in order of priority.
9. It is backed by testing, with company-certified results of 99.99% for viruses, bacteria and mold. See our residential ozone service.
10. It works in many spaces: homes, shops, schools, temple halls and offices, once they are clean and dry.

Before and After: A Ban Sang Home After the Water Recedes

Example Case: A Half-Timber House Preparing for a Patient's Return From a Shelter

(An illustrative example of the process, not a review from any real customer.)

Picture a house like Auntie Sri's, a half-timber home in Ban Sang where water stood on the ground floor for days. Her son, call him Ek, works at an industrial estate. After the water went down he took leave to help his mother shovel out mud and throw away the mattress and the swollen food cabinet. He washed the ground-floor floor and walls with clean water and detergent, wiped them again with disinfectant following the label, opened every door and window, and ran fans for several days.

Once the walls had started to dry and no more water was seeping from the floor, Ek messaged WHD on LINE with photos of the kitchen, the ground-floor bedroom and the upstairs bedroom where the smell was rising. The team asked a few questions, confirmed travel and set a date. On the day, the whole family waited at a relative's house. The technician treated the ground-floor bedroom where his father would sleep first, then the kitchen and the upstairs rooms, zone by zone, followed by the rest and ventilation period.

What families in this situation usually say afterwards is that the lingering smell has dropped noticeably and they feel more confident bringing a patient home. Just as important, they keep watching everyone's health and go to a doctor straight away if anyone develops a fever or unusual symptoms, because ozone helps the house, not the illness.

Ban Sang Recovery Checklist: Before and After Ozone

Before ozone

• Wait until local authorities confirm the water has receded and it is safe to return.
• Switch off power at the breaker before entering and have an electrician check it before use.
• Wear boots, rubber gloves and a mask while cleaning, and wash your hands often.
• Remove as much mud as possible and discard mattresses and soaked items that cannot be cleaned.
• Wash floors, walls and furniture with clean water and detergent, then disinfect surfaces following Department of Disease Control advice.
• Open doors and windows and use fans until floors and walls are dry.
• Remove food, medicine and personal items, and take people, pets and plants out on treatment day.

After ozone

• Wait for the full rest and ventilation period the technician gives before going back in.
• Keep airing the house and keep humidity from climbing again.
• Check former mold spots regularly. New growth means moisture is still building up and the cause must be fixed.
• Repair or repaint only once walls are completely dry.
• Watch for symptoms. Anyone with fever, calf pain, diarrhoea or breathing difficulty should see a doctor.

FAQ: Ozone Disinfection After the Ban Sang, Prachinburi Flood

The water has not fully gone. Should I book now?
You can consult and plan ahead, but the treatment itself should happen once the water has clearly receded, the mud is out, the house is washed and surfaces are dry enough. If the water returns, the work has to be repeated.

Can my family stay upstairs during treatment?
No. The treated zone must be empty and sealed, and in timber houses where air moves easily between floors, the technician may ask everyone to leave the whole house for that period.

How long does it take?
Typically about 30 minutes per zone per cycle, plus preparation and ventilation. Total time depends on the size of the house and the number of rooms.

Does WHD have a branch in Prachinburi?
No. WHD is in Bang Khae, Bangkok. Service in Ban Sang is arranged by phone on 065-556-6294 or LINE @whd268, and travel is confirmed when you contact us.

I waded through water for days and now have a fever and calf pain.
See a doctor immediately and mention the flood exposure. These can be signs of leptospirosis, which needs prompt treatment.

Plan Ozone Disinfection for Your Home in Ban Sang, Prachinburi

Send photos and details for an assessment first, then book a date when the house is ready.

View the Ozone Disinfection Service

Call 065-556-6294 | LINE @whd268 | Contact us

Related Links and References

• Residential and building ozone disinfection service
• Ozone cleaning service
• Company certifications
• Matichon (2 Oct 2026): water converges and stands in every subdistrict of Ban Sang
• Daily News: national flood summary from DDPM, 5 Oct 2026
• Thai PBS: ONWR warns of heavy rain and flash floods, 5 to 7 Oct
• CDC: Floods and cleanup safety
• WHO: Fact sheets
• Department of Disease Control, Thailand

Note: figures and flood conditions in this article reflect the dates stated in news and DDPM reports and change daily.