A typical scenario (example case, not a real person)

Auntie Sri has lived in a two-storey, half-timber, half-concrete house in Lam Pho since long before the housing estates arrived nearby. On the morning of 25 September the water began pooling in her front yard. She assumed it would drain away, because it rains like this every year. It did not stop raining. The next day water was in the living room. On the third day her son had to haul the fridge, the television and the rice sacks upstairs, and the whole family moved into a single bedroom on the upper floor. Downstairs became a pool of tea-coloured water with rubbish circling slowly by the kitchen door.

She says the worst part was not sleeping shoulder to shoulder, or wading to the end of the lane for supplies. It was the smell. Every night it drifted up the staircase: mud, drains and a mustiness that grew stronger each day. Her youngest grandchild developed a rash on his legs, and her husband, already an allergy sufferer, would not stop sneezing. She asked her son whether the house would ever be the same once the water went down. It is the same question hundreds of families in Lahan and Lam Pho are asking right now.

Where Lahan and Lam Pho Flooded: Facts From the Disaster Declaration

This section relies only on Siam News reporting of Bang Bua Thong District's flood disaster declaration. Water levels change daily, so please also follow announcements from Bang Bua Thong District, your local administrative organisation and Nonthaburi Province.

Note that the declaration covers every listed village in both subdistricts, not a handful of lanes. Damage is spread widely across older community homes, roadside houses and housing estates alike. The source gives no household counts per subdistrict, so we do not quote any.

For national context, the Department of Disaster Prevention and Mitigation (DDPM) reported on 2 October 2026 that floods affected 31 provinces plus Bangkok, 1,245,581 households and 3,535,206 people, caused by heavy to very heavy rain together with runoff from the north. These figures change daily.

Why the declaration matters for home recovery: being inside a declared flood disaster area allows government agencies to provide assistance to affected people under the applicable rules. Photograph the damage before you clean, keep the evidence, and ask your village headman, local administrative organisation or the Bang Bua Thong District Office directly about how to apply.

How Long-Standing Water in Lahan and Lam Pho Differs From a Flash Flood

Water from one night of heavy rain often drains in a few hours or a day or two. Water caused by continuous rain plus a high river tends to stay much longer, because it has nowhere quick to go. That difference shapes what happens to germs and mold inside a house.

Days one and two: the water brings mud, litter and drain water inside. Surfaces get wet and sewage bacteria settle on floors and the lower walls.

Days three to five: the water goes still and darker, its oxygen falls and organic matter starts to rot. The smell intensifies. Plaster and timber become saturated and gypsum boards begin to crumble.

After that: walls above the water line start to get damp as concrete and wood wick water upwards. Mold appears above the line, inside ground-floor wardrobes and in closed rooms. Humidity throughout the house stays high, so even the dry upper floor starts to smell musty.

So a house in Lahan or Lam Pho that sat in water for days should not be treated like a house that flooded for one night. Wiping and running a fan is not enough. You have to deal with deep moisture and with mold that may be growing where you cannot see it.

Every Kind of Flood Germ in Lahan and Lam Pho, and What It Does to People

Bacteria: E. coli, Salmonella and sewage organisms

During a long flood, septic tanks, manholes and drains in the community overflow into the floodwater, spreading E. coli and Salmonella everywhere. They settle on kitchen floors, utensils and anything that went under. Many families keep cooking upstairs during the flood, sometimes rinsing vegetables or dishes in water that may be contaminated, so food poisoning and diarrhoea are a real risk. Watch for repeated loose stools, stomach pain, vomiting and fever, especially in children and older people, who dehydrate quickly.

Leptospirosis

Communities that mix houses, gardens and open land usually have plenty of rats. In a flood they climb to higher ground and their urine mixes into the water. Leptospira enters through cuts or skin softened by long soaking. Many Lahan and Lam Pho residents had to wade every day to get to work, buy food or collect relief packs, so their risk is higher than someone who waded once. Key symptoms are sudden high fever, headache, severe calf pain and red eyes. Anyone with these signs after wading should see a doctor quickly and say they have been in floodwater for several days.

Viruses: norovirus, rotavirus, RSV and influenza

During floods, families often crowd into one upstairs room or move to temporary shelters. Living close together in damp air helps RSV and influenza spread, while norovirus and rotavirus travel on hands, dishes and contaminated surfaces, causing diarrhoea and vomiting that can pass through a whole household.

Mold: the real enemy of a house that stood in water

The WHO and CDC advise cleaning and drying within 24 to 48 hours after floodwater leaves. A house that has been under water since 25 September passed that window long before the water even went down. Mold has every chance to grow in walls, door frames, timber floors, plywood cabinets, mattresses and clothes. Its spores aggravate allergies, asthma and chronic lung disease. Small children may develop a persistent cough and older people may find breathing harder.

Musty and stagnant-water odour

Water that sits still for days leaves the smell of rotting organic matter inside porous materials. When the water goes, the smell does not go with it, because its source is still in the concrete and the wood. It gets stronger at night and on humid days, disturbing sleep and making families feel the house is still not safe.

Who Needs Extra Care in Lahan and Lam Pho Homes

• Older and bedridden people who cannot easily move upstairs, spend long periods in damp air and often have underlying conditions.
• Small children with sensitive skin that reacts to dirty water, and who dehydrate quickly with diarrhoea.
• Pregnant women, who should avoid wading and stay out of moldy rooms and away from moldy walls being stripped.
• People with chronic illness such as diabetes with slow-healing wounds, kidney or heart disease, or weakened immunity.
• Anyone who has to wade every day to work or to help neighbours.

What a Long Flood Costs Families in Lahan and Lam Pho

Health: diarrhoea, rashes, coughs and allergies can drag on for weeks, because people live with the damp from the flood itself right through the recovery.

Money: long soaking damages more than a quick flood. Plywood furniture swells, appliances fail, timber doors warp, and some walls or floors may have to come out. The more the recovery is done out of order, the more you pay twice.

Time: recovering a house that stood in water takes longer than people expect. You must wait for the water to really go, wait for materials to really dry, and resist rushing back in.

Income: many families in these communities earn from home, running a grocery, a made-to-order food stall or piecework on the ground floor. When the ground floor is unusable, the income stops too.

Wellbeing: watching a home of decades sit under water for days, and sleeping crammed into one room, wears people down, especially older residents deeply attached to their houses.

Why Washing and a Fan Are Not Enough After Long-Standing Water

Bleach does not penetrate: on masonry that has been saturated for days, bleach acts only on the surface. Mold inside the material survives, and the extra water slows drying.

Fans only dry the skin: concrete that soaked for days can look dry in a day or two while staying wet inside, releasing moisture for weeks.

Masking the smell: sprays, charcoal and pandan leaves help a little, but the source remains in the walls and floor.

Repainting too soon: paint on a damp wall blisters and peels within weeks, and mold returns under the new coat.

Moving back into a ground-floor bedroom too early: sleeping in a damp room full of mold spores is the biggest risk of all for children and older people.

A Phased Recovery Plan for Homes in Lahan and Lam Pho

Phase 1: while water is still present

• Switch off ground-floor power and never touch wet sockets or switches.
• Photograph damage in every room as evidence.
• Wear boots when wading and wash with clean water and soap straight afterwards.
• Drink clean or boiled water and eat freshly cooked food.

Phase 2: the first day the water is gone

• Have an electrician check the system before switching on downstairs.
• Shovel out mud; discard mattresses, carpets, fabric sofas and anything soaked through.
• Open every door and window.

Phase 3: wash and strip

• Wash floors and walls with clean water and detergent, then disinfect surfaces as recommended.
• Remove gypsum, ceilings and plywood cabinets that have swollen or grown mold, cutting above the water line.
• Open up skirting and trim that hide gaps, so moisture behind them can escape.

Phase 4: dry for real

• Run extraction fans and dehumidifiers continuously until materials are dry inside and out.
• A long-soaked house can need much longer to dry than a flash-flooded one. Do not rush.

Phase 5: ozone to remove remaining germs and odour

• Once the house is clean and dry, treat it zone by zone with ozone to deal with germs, mold and smells still hiding in the air and in gaps.

Phase 6: follow up

• Keep watching walls and smells for several weeks. Mold that returns means moisture is still there and the source must be found.

WHD Ozone Disinfection for Bang Bua Thong, Lahan and Lam Pho

World Health Disinfection (WHD) is a disinfection company based in Bang Khae, Bangkok. We have no branch in Bang Bua Thong, but we can plan service for homes in Lahan and Lam Pho, with the date and travel confirmed by phone or LINE first. We do not promise same-day arrival: demand after floods is high, and the house must be washed and dried before treatment anyway.

How ozone works: ozone (O3) is a three-atom form of oxygen with strong oxidising power. Released into a sealed room, the gas spreads everywhere, reaching behind wardrobes, under beds and into gaps that no cloth can reach, and breaks down the cell structures of viruses, bacteria and mold along with odour molecules. It then reverts to oxygen (O2) and leaves no chemical residue. According to the test results certified for the company by Thailand's Department of Medical Sciences and Intertek (UK), ozone treatment eliminates viruses, bacteria and mold by 99.99%.

Service steps:

1. Contact us on 065-556-6294 or LINE @whd268 with photos, the number of rooms and the height the water reached.
2. The team assesses whether the house is ready for ozone and advises what still needs doing first.
3. Book a date and divide the house into zones, for example living room, kitchen, ground-floor bedroom and storeroom.
4. Prepare each room, close doors and windows, and make sure all people, pets and plants are out.
5. Run the ozone cycle, typically about 30 minutes per zone, then rest and ventilate the room before anyone goes back in.

Safety rule: ozone is used only in an empty, sealed room. In a house with a bedridden relative, the team plans for the person to stay in an area that is not being treated, or somewhere else for a short time, and to return only after the rest and ventilation period.

More details: residential and building ozone disinfection and ozone cleaning service.

10 Reasons Lahan and Lam Pho Homes Should Use Ozone After a Long Flood

1. Long soaking puts germs below the surface: ozone gas reaches gaps that wiping cannot.
2. It tackles stagnant-water odour at the source instead of covering it with fragrance.
3. It helps prepare rooms for older and bedridden relatives before they move back downstairs, through home ozone disinfection.
4. No chemical residue, because ozone reverts to oxygen.
5. Covers bacteria, viruses and mold according to the company's certified test results.
6. Ideal for ground-floor storerooms and wardrobes, the stuffiest and slowest-drying spaces.
7. Lowers the chance of mold returning when done after the house is truly dry.
8. Helps home-based shops reopen with confidence, such as groceries and food stalls run from the ground floor.
9. About 30 minutes per zone, so moving back in is easy to plan.
10. Free medical-grade disinfectant spray with any ozone service of 15,000 baht or more.

Before and After: A Lam Pho House Recovered in the Right Order

Example Case: A Home With a Bedridden Grandmother in Lahan

(An example case to explain the process, not a verified customer review)

Nok, the eldest daughter of a family in Lahan, cares for her grandmother, who is in her eighties and bedridden in a ground-floor bedroom. When water entered the house on 25 September, the family had to carry her, bed and all, up to the cramped and hot second floor. Once the water receded, Nok wanted nothing more than to get her grandmother back to her own room. But that room had soaked for days. There were dark marks on the walls, the old mattress was so wet it had to go, and the mustiness was overpowering.

Nok sent photos to WHD on LINE. The team advised against ozone straight away. First the room needed washing, the swollen partition boards needed to come out, and a dehumidifier had to run until the materials were dry. The family spent several days on this and threw out a warped plywood cabinet. Once the room was dry they booked the ozone treatment in three zones: the grandmother's bedroom, the living room and the kitchen.

On the day, the grandmother rested upstairs in a room with its door shut, separate from the zones being treated, and everyone else left the ground floor. The team treated one zone at a time, then rested and ventilated each before allowing anyone back. Afterwards the musty smell in the downstairs bedroom was clearly lower. The family bought a new mattress and brought the grandmother back down. Her cough, which had worsened during the flood, Nok took to the doctor at her scheduled appointment, because ozone looks after the room, not the patient.

Before and After Ozone: A Checklist for Lahan and Lam Pho Homes

Before

• The water has fully gone, with none pooling under the floor or around the house.
• An electrician has checked the ground-floor wiring.
• Mud, mattresses, carpets and soaked items are out.
• Floors, walls and kept furniture are washed with clean water and detergent.
• Swollen or moldy partitions and plywood cabinets are removed.
• Materials are truly dry inside and out.
• People, bedridden relatives, pets and plants are out of the zone to be treated.

After

• Wait for the rest and ventilation period the team specifies.
• Open doors and windows before sleeping in the room.
• Wash dishes and food-contact surfaces again.
• Keep watching walls and smells; if mold returns, find the damp spot.
• Anyone with fever, calf pain, diarrhoea or a rash should see a doctor.

FAQ: Ozone After the Lahan and Lam Pho Flood

There is still water around the house. Can we do ozone now?
Not yet. Wait for the water to go, remove mud, wash and dry first. Ozone is the last step and does not replace washing or drying.

Does WHD have a branch in Bang Bua Thong?
No. WHD is based in Bang Khae, Bangkok. Lahan and Lam Pho residents can plan service on 065-556-6294 or LINE @whd268, and the team will confirm the date and travel.

We have a bedridden relative. What do we do?
They must be moved out of the zone being treated, because ozone is used only in empty rooms. The team helps plan the order of zones so the person can rest somewhere safe.

Can a half-timber house be treated?
Yes, but the wood must be dry first and openings must be sealed during treatment. The team assesses on site.

How long does it take?
Typically about 30 minutes per zone, not counting preparation and ventilation.

I waded for days and now have a fever and calf pain. What should I do?
See a doctor straight away and mention the floodwater. It may be leptospirosis. More guidance is available from the CDC.

Make Your Lahan or Lam Pho Home Livable Again

Send photos of your house and the water line to the WHD team, and we will plan ozone treatment once the house is clean and dry.

See the Ozone Disinfection Service

Phone 065-556-6294 · LINE @whd268 · worldhealthdisinfection@gmail.com

Related Links and References

WHD services

• Residential and Building Ozone Disinfection
• Ozone Cleaning Service
• Certificates

References

• Siam News: Bang Bua Thong flood disaster declaration (declared 28 Sep 2026, signed 29 Sep 2026)
• Bangkok Biz News: DDPM flood situation report
• WHO fact sheets
• CDC: Floods and cleanup