Last updated: 5 Oct 2026 | 5 Views |
The 2026 flood in Ban Mi district, Lopburi did not stop at one village. It spread across eight subdistricts: Nong Krabian, Ban Kluai, Nong Mueang, Phu Kha, Ban Sai, Hin Pak, Nong Sai Khao and Sai Huai Kaeo. Water from irrigation canals and the Lopburi River flowed into homes and rice fields at depths of roughly 50 to 90 centimetres, high enough to reach ground floors, rice barns, tool sheds and the open space beneath many farmers' stilt houses. When the water goes down, what remains is mud, damp, germs, mold and a musty smell that makes a home hard to live in. This article looks at what a field-borne flood in Ban Mi leaves inside houses, why washing alone is not enough, and when and how ozone disinfection in Ban Mi can be done safely.
A typical scenario (an illustrative example, not a statement from any real person)
Uncle Plian has farmed rice since he was a young man. His home is a wooden house raised half a storey on posts in one of Ban Mi's subdistricts. Beside it stand an old rice barn, a shed for his walking tractor and a chicken coop. The shaded space under the house is where he and his wife eat, weave baskets and nap through the hot afternoons.
This year the rice was just heading, and he expected to harvest soon. Then steady rain and rising water from the irrigation canal turned the field in front of the house into a lake within days. Water flowed under the house, over the bamboo platform, the old food cabinet, sacks of fertiliser and a can of engine oil. He and his son carried what they could upstairs, but some of the paddy in the barn was already wet.
When the water fell, a hand's depth of mud covered the ground under the house. It smelled of rotten water, fertiliser and chicken droppings. The wooden platform they sat on every day was covered in black spots. The wet paddy began to smell sour. His wife developed itchy patches on her arms and legs, and the grandson who came to help shovel mud complained that his nose stung. Uncle Plian looked out at the fields still underwater and thought: the rice can wait a little, but the house the whole family sleeps in every night cannot.
According to MGR Online on 4 October 2026, the flood situation in Ban Mi district, Lopburi was:
Nationally, the DDPM, as reported by Thai PBS on 4 October 2026, said flooding still affected 27 provinces plus Bangkok, covering 154 districts, 1,171,165 households and 3,262,676 people, with renewed heavy rain warned for 4 to 7 October. All of these figures change daily. Ban Mi residents should follow announcements from the district office, subdistrict administrations and the local irrigation project closely.
The key feature of the Ban Mi flood is that the water crossed rice fields and irrigation canals before reaching homes. It carries soil, fertiliser, farm chemicals, animal manure and septic waste from houses upstream. At 50 to 90 centimetres, single-storey houses built at ground level take water inside, while raised houses hold water underneath and in their barns.
A rural home in Ban Mi is more than the house itself. It includes working spaces tied to farming, and each one carries a different risk.
For rural families, the area under a raised house is the daily living room: meals, rest and minding grandchildren. When it floods, mud settles on the earth or concrete floor, and wooden platforms, chairs and mats soak up water. Mold grows quickly, and older people who spend the whole day there breathe in the most spores.
Wet paddy and seed rice grow mold very easily. The sour smell drifts into the house, and mold dust stirred up while moving the grain can cause coughing, sneezing or chest tightness. Anyone moving wet grain should wear a mask and gloves. Moldy rice should not be eaten or fed to animals; ask local agricultural officers for advice.
Split fertiliser bags, pesticide bottles and overturned oil cans contaminate the water and mud around the house. Wear rubber gloves, never handle these items bare-handed, and keep damaged chemical containers apart for proper disposal. These areas must be cleaned before any disinfection step.
When pens and coops flood, manure spreads with the water into the house and along paths people use every day. This is a major source of the bacteria that cause diarrhoea, and the reason to wash hands every time after working around the house.
Newer single-storey concrete houses often sit directly on the ground, so 50 to 90 centimetres of water reaches bedrooms, kitchens and bathrooms. Mattresses, particleboard cabinets and the lower walls wick water up higher than the actual flood line, leaving stains and mold tens of centimetres above it.
Many rural homes still use well water or rainwater stored in large jars. If floodwater got into a well or jar, do not drink that water or use it for washing dishes until it has been cleaned and local health officers have given advice.
Water that runs from irrigation canals and the Lopburi River through fields, animal pens and villages before reaching each home carries a mix of germ groups. Knowing them helps families protect themselves properly.
E. coli comes from human and animal faeces. When septic tanks and pens flood, it spreads with the water and stays on surfaces in the house, causing diarrhoea, cramps and nausea. Salmonella is found in poultry droppings and contaminated food and causes fever, diarrhoea and vomiting, so families keeping chickens or ducks near the house need extra care.
For farmers, leptospirosis is a familiar name, because field rats live along the dykes and in rice barns. When water rises, rats move into houses and barns, and the bacteria in their urine mix into the water and mud, entering the body through cuts or skin soaked for a long time. People who wade out to check their rice, walk along flooded dykes or carry wet grain from the barn are at high risk. Sudden high fever, headache, calf pain or red eyes after wading, usually within one to two weeks, mean a visit to the hospital or subdistrict health centre straight away, telling the doctor about the wading.
Norovirus spreads very easily through hands, food and unsafe water and causes sudden vomiting and diarrhoea. Rotavirus mostly affects young children and can cause severe watery diarrhoea and dehydration. RSV and influenza spread through droplets and touched surfaces. During floods, villagers often stay together with relatives on higher ground, in temple halls or at shelters. Close quarters in damp spaces let respiratory infections spread quickly, especially among children and older people.
Mold can start growing on wet materials within 24 to 48 hours, which is why the CDC and WHO advise cleaning and drying within that window. Farm homes are full of mold food: paddy, straw, jute sacks, bamboo, wooden platforms, mattresses and clothing. Airborne spores trigger allergies and asthma, and in people with weak immunity they can cause more serious breathing problems.
The smell in a home after a field flood is a blend: rotting mud, moldy grain, manure and the damp odour of mold inside materials. It is not just unpleasant. It signals that germ sources and moisture are still present. Air freshener or a bowl of charcoal helps only a little.
Health. The weeks after a flood are when families work hardest: shovelling mud, moving grain, washing the house and repairing things. Exhaustion plus a damp house makes people ill. Common problems include athlete's foot from soaked skin, rashes, coughing, sneezing, diarrhoea and fever.
Income. Around 11,970 rai of damaged farmland, as reported, means a whole season of income lost for many families. Repair bills that grow because mold has gone deep make that burden heavier. Dealing with moisture and germs early lowers the chance of having to strip out materials later.
Family. Older relatives and children staying with family elsewhere want to come home soon, but moving back into a house that still smells musty and holds mold can make them ill again.
What is missing is a step that handles germs and odour in the air, corners and gaps in materials throughout each room once the house is clean and dry. That is the job ozone does well.
The residential and building ozone disinfection service from World Health Disinfection (WHD) uses ozone gas (O3), a strong oxidiser that breaks down the cell structures of viruses, bacteria and mold and destroys odour molecules in the air and on surfaces. Afterwards it reverts to oxygen (O2), so no chemical residue is left on platforms, mattresses or kitchenware.
According to test results certified for the company by Thailand's Department of Medical Sciences and Intertek (UK), WHD's ozone system eliminates viruses, bacteria and mold by 99.99%.
Please note: ozone comes after shovelling mud, washing, discarding damaged items and drying the house. It does not replace cleaning, it cannot make moldy rice safe to eat, and it does not replace seeing a doctor.
Safety rule: the treated space must be empty and closed, with no people, pets or plants, and nobody returns until the rest and ventilation period is complete. Homes with chickens or other animals nearby must move them well away from the work area.
Service in Lopburi: WHD is based in Bang Khae, Bangkok, and has no branch in Ban Mi or Lopburi province. Service must be booked in advance by phone at 065-556-6294 or LINE @whd268 to confirm the area, date, time and travel cost. Same-day arrival cannot be guaranteed, and work only goes ahead once roads are passable, the water has gone and the house is dry enough. Several families in the same village may wish to consult together to make planning easier.
(An illustrative example, not a real customer review)
Waew and her husband own a single-storey concrete house built at ground level on the road into a village surrounded by rice fields. Knee-high water sat inside for several days before falling. Their daughter's bedroom, the kitchen and the storeroom were all affected.
After the water receded, the family and neighbours shovelled out the mud, hosed the floors and walls, threw away two mattresses and a swollen particleboard wardrobe, and ran fans with the windows open for days. Still, the lower walls smelled musty, and their daughter, who has allergies, woke up congested every night in her old room.
Waew contacted WHD on LINE with photos of every room. The team asked her to check the walls were dry enough, move rice and dry food out of the rooms, and choose a day when the whole family could stay with relatives. On the day, the team treated the bedroom, kitchen and storeroom zone by zone. After the rest and ventilation period, the family returned. The musty smell had clearly dropped and their daughter slept more comfortably. Waew plans to let the walls dry fully before repainting, as advised.
Q: There is still water under the house. Can we do ozone yet?
A: Not yet. Wait for the water to go, then shovel, wash and dry first. Ozone does not replace cleaning.
Q: Can ozone in the rice barn make moldy rice safe to eat?
A: No. Do not use it for that purpose. Ask agricultural officers about moldy grain and do not eat it. Ozone is for germs and odour in rooms after cleaning.
Q: Do we have to leave the house during treatment?
A: Yes. No people, pets or plants in the space, and return only after the rest and ventilation period.
Q: How long does it take?
A: Typically about 30 minutes per zone, plus preparation and rest time, depending on the size of the house.
Q: Does WHD have a team in Lopburi?
A: No. WHD is in Bangkok. Ban Mi jobs are booked in advance at 065-556-6294 or LINE @whd268, with date, time and travel cost confirmed.
Q: If my house is treated, do I still need a doctor for a fever after working in the fields?
A: Always see a doctor. Ozone treats germs in the house, not illness. Fever and calf pain after wading can be signs of leptospirosis.
Once the water has gone and the house is dry, send photos and details to the WHD team so they can assess the job and plan travel in advance.
View the Ozone Service and Get Advice
Call 065-556-6294 | LINE @whd268 | worldhealthdisinfection@gmail.com
Note: flood figures in this article are as of the dates given in the news and DDPM reports and change daily.
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