A Typical Scenario: A Two-Unit Shophouse in Central Nakhon Nayok

(An illustrative example based on situations commonly seen after floods. The person and details are not real.)

Noi runs a stationery and photocopy shop on the ground floor of a two-unit shophouse in Nakhon Nayok town. Her family sleeps upstairs: her mother, who is in her seventies, and her daughter, who is in primary school. On the day the water came in, Noi lifted the photocopier onto a table, stacked boxes of paper on the highest shelves and assumed this would be like earlier years, when the water came and went within a day or two.

This time it did not go. Relatives in the outskirts called to say the water in front of their houses had dropped and they were already sweeping out mud. In front of Noi's shop the water stayed brown, still and nearly knee-high. She noticed the smell change, from plain muddy water to something sour, with a note of drains. When she opened the cupboard under the counter, the paper she had wrapped so carefully was slick with slime.

When the water finally went down, a straight tide line ran the full length of the shop walls, and above it a second, fainter band of damp crept higher still, because plaster draws water upwards like blotting paper. Her daughter started coughing every night. Her mother complained that she could not breathe comfortably downstairs. Noi scrubbed the floor twice with bleach, ran fans all day and emptied a can of air freshener, yet every evening the musty smell crept back.

Where It Flooded in Nakhon Nayok Town: Facts From News Reports

The information below comes from news reports between late September and early October 2026. Flood figures change daily, so always check the latest announcements from local authorities before planning your return home.

• Water level in town: Thairath reported that water inside Nakhon Nayok town remained around 40 to 50 cm deep while the outer areas had started to recede.
• Province overview: Thai PBS reported on 30 September 2026 that Nakhon Nayok province was affected across 4 districts, 41 subdistricts and 397 villages, a total of 28,028 households.
• Dam releases: Khun Dan Prakan Chon Dam was reported to be releasing water during the same period.
• National picture: According to the Department of Disaster Prevention and Mitigation (DDPM) report of 2 October 2026, flooding affected 31 provinces plus Bangkok, 1,245,581 households and 3,535,206 people, caused mainly by heavy to very heavy rain combined with runoff from the north.

What these facts tell people in town is that buildings downtown stayed in water longer than those in the outskirts. Forty to fifty centimetres may not sound dramatic, but it is enough to submerge the lowest wall sockets in many homes, the legs of tables and beds, low cabinets, sofas, storage bins and any appliance standing on the floor. When water sits at that level for days, plaster, plywood, door frames and skirting boards wick moisture well above the actual waterline and become the damp zone that mold likes most.

There is no separate household figure for Nakhon Nayok town itself. Apart from the water level reported by Thairath, the household numbers above are province-wide and do not refer only to Mueang district.

Why a Town Flood in Nakhon Nayok Is Different From a Field Flood

Floodwater in rice fields and orchards usually moves across open land, gets sun and wind, and falls as the waterways fall. Floodwater in a town mixes with everything a town produces every day: water from storm drains, household and restaurant wastewater, overturned rubbish bins, food scraps from the market, engine oil from vehicles and overflow from septic tanks. This water carries more organic matter and is far more likely to be contaminated with faecal material.

Town buildings are also closed buildings. A shophouse is narrow and deep, with windows only at the front and back, so air barely moves. When the ground floor has soaked for days and the steel roller shutter stays down, humidity builds inside like an oven. Detached houses in tight sois face a similar problem because they stand close together and the breeze struggles to pass. Dormitories and apartment blocks have many small rooms side by side, each with mattresses, curtains and wardrobes that soak up moisture readily.

Every Kind of Germ the Flood Brought to Nakhon Nayok: Know the Invisible Enemy

1. Bacteria from sewage and faecal matter

When drains and septic tanks overflow, intestinal bacteria such as E. coli and Salmonella travel with the water into homes. They stick to floors, table legs, kitchenware and children's toys. A hand that touches a contaminated surface and then the mouth, or a dish that was not washed properly, can lead to diarrhoea, stomach cramps, nausea, vomiting or fever.

2. Leptospirosis

Rats live in drains, markets and rubbish heaps in every town. In a flood, Leptospira bacteria shed in rat urine spread through the water. They enter the body through cuts on the feet and legs or through skin softened by long soaking. People who waded through town streets for days to get in and out of their homes or to carry belongings are a risk group. The warning signs to remember are a sudden high fever, headache and severe calf pain. Anyone with these symptoms after wading should see a doctor immediately and mention the flood exposure, because early treatment greatly reduces severity.

3. Viruses that spread in homes and dormitories

Norovirus and rotavirus are highly contagious gut viruses that travel in sewage-tainted water and survive on surfaces for a long time. When one person in a house or dormitory has diarrhoea, others who share the toilet, door handles or stair rails catch it easily. Respiratory viruses such as influenza and RSV already circulate in the rainy season. During a flood, people crowd together, sleep badly and become exhausted, which weakens immunity, so these viruses spread quickly in families with young children and elderly members.

4. Mold that grows silently in walls and furniture

International health bodies such as WHO and CDC advise cleaning and drying a home within 24 to 48 hours after floodwater recedes to limit mold growth. In Nakhon Nayok town this time, that window passed while the water was still standing. Mold therefore began to grow before the water left: on plaster above the waterline, under laminate floors, inside particle-board cabinets, behind wallpaper and in sofa cushions. Airborne spores cause a blocked nose, coughing, sneezing and itchy eyes, and can trigger asthma or allergies in children and the elderly.

5. Musty and sewage odours

The smell after a flood is not just a nuisance. It is a sign that rotting organic matter, sewage residue or mold is still present. Musty odours come from volatile compounds released by mold. Drain or rotten-egg smells come from the breakdown of waste in stagnant, airless spaces. As long as the source remains, the smell returns, no matter how much perfume you spray.

Who is most at risk

Take extra care with elderly people, young children, pregnant women, people with chronic conditions such as diabetes, kidney disease, lung disease, asthma or allergies, and anyone with weakened immunity. Many shophouses in town are home to several generations at once, with grandparents and small grandchildren under the same roof. Restoring the home properly is not about appearance. It is about protecting the most vulnerable people in the house.

The Damage Nakhon Nayok Town Residents Carry After the Water Leaves

Health: Lingering coughs, blocked noses, itchy rashes, repeated diarrhoea and sleepless nights because of the smell are all common in homes that were only partly restored. These problems mean missed school, missed work and medical bills.

Money: Many people in town earn their living on the ground floor of their own building: food stalls, grocery shops, clothing stores, repair shops, photocopy shops. Every day the shop stays closed is lost income, and if customers walk in and smell damp, you lose them a second time. Stock that has gone mouldy must be thrown away. Furniture painted over mold may need to be rebuilt within months.

Reputation: Dormitory and room-rental owners in town immediately face the question "Is the room safe?" If a tenant moves in and finds mold or falls ill, word of mouth hurts income for a long time.

Family: Worry about sick children and elderly parents, plus days of hard labour, strain every household. A clean, dry, odour-free home gives the family back its sense of safety.

Why Familiar Fixes Are Not Enough for Homes in Nakhon Nayok Town

• Bleach alone: Bleach disinfects smooth surfaces but does not reach plaster that has wicked water above the line, gaps under tiles or germs in the air. It must never be mixed with ammonia or acid products because dangerous gases form.
• Fans with the shutter closed: Fans dry the surface, but if humid air has nowhere to go, it just circulates indoors, and the fan spreads mold spores around the room.
• Air fresheners and perfume: They mask the smell for a few hours and do nothing to the source. For allergy sufferers, synthetic fragrance can make symptoms worse.
• Painting over mold stains: Many shophouse and dormitory owners choose this because it is fast, but mold under paint keeps growing and pushes the paint off in sheets within months, so you pay twice.

Ozone Disinfection in Nakhon Nayok Town: The Final Step Before You Move Back In

Ozone (O3) is a gas made of three oxygen atoms with strong oxidising power. Released into a sealed room at a controlled concentration, it spreads everywhere: into stagnant corners, behind cupboards, under beds and into gaps that a cloth or a hand cannot reach. It breaks down the cell structures of viruses, bacteria and mold and the molecules that cause odour, then reverts to oxygen (O2), leaving no chemical residue.

World Health Disinfection (WHD) provides residential and building ozone disinfection. According to the test results the company has had certified by Thailand's Department of Medical Sciences and Intertek (UK), the service eliminates viruses, bacteria and mold by 99.99%.

Important to know first: WHD is based in Bang Khae, Bangkok, and has no branch in Nakhon Nayok. If you need service in Nakhon Nayok town, contact the team by phone at 065-556-6294 or on LINE @whd268 to plan the job and confirm coverage, travel and a suitable date. The team cannot promise same-day arrival, especially while roads in town are still under water.

The typical ozone process

1. Assessment: Share details by phone or LINE with photos: floor area, number of rooms, how high the water reached and whether the space has been cleaned and dried.
2. Preparation: All people, pets and plants leave the space. Doors and windows are closed, unnecessary vents sealed, air conditioners and fans switched off.
3. Ozone release: The ozone machine runs in the sealed space according to room size, typically about 30 minutes per zone.
4. Contact time: Ozone remains in the room to react with germs and odours.
5. Rest and ventilation: Ozone is allowed to revert to oxygen, then the room is aired before anyone re-enters. The team tells you when it is safe to go back in.

The golden rule: Ozone treatment is carried out only in an empty, closed space. No people, pets or plants may be inside during treatment, and nobody re-enters until the rest and ventilation period is over. Ozone comes after mud removal, washing and drying. It does not replace cleaning, repairs or medical care.

10 Reasons Homes in Nakhon Nayok Town Should Be Ozone-Treated After the Flood

1. Town water stayed longer than in the outskirts, so germs and moisture went deeper, and whole-room treatment matters more than wiping surfaces.
2. Shophouses have poor airflow. Ozone is a gas that reaches the innermost rooms that natural breezes never touch.
3. It reaches places hands cannot, such as behind cabinets, under stairs, ceiling voids and beneath shop counters.
4. It tackles odour at the source instead of masking it, by breaking down odour molecules. See the service details
5. No chemical residue, because ozone reverts to oxygen, which suits homes with small children and elderly relatives.
6. Several germ groups in one treatment: bacteria, viruses and mold, at 99.99% according to the company's certified tests.
7. Shops reopen with confidence, because customers walk in without meeting the smell of floodwater. Ask about shophouses and stores
8. Dormitory owners have a clear process to explain to tenants: rooms were washed, dried and disinfected.
9. Short time per zone, about 30 minutes plus rest time, so you can plan floor by floor or room by room.
10. A clear finishing point for restoration. After washing, repairs and drying, ozone is the last step before belongings go back. Book through the service page

Before and After: A Nakhon Nayok Town Shophouse Restored in the Right Order

Results vary with the extent of damage, how long the building soaked and how thoroughly it was cleaned and dried before treatment.

Example Case: A Five-Room Dormitory in a Central Nakhon Nayok Soi

(An example case to explain the process. Not a real customer review.)

Ek owns a small single-storey dormitory with five rooms in a soi in the middle of town. Most tenants are workers and students. While water in Nakhon Nayok town stayed between shin and knee height for days, every tenant moved in with relatives, and all five empty rooms soaked along with their mattresses, plywood wardrobes and curtains.

When the water left, Ek first photographed the damage in every room, then had an electrician check the wiring before switching the power back on. He threw out all the swollen mattresses and particle-board wardrobes, cut away the swollen skirting, shovelled out the mud and washed floors and walls with clean water and detergent. He wiped down surfaces with disinfectant, then opened every door and window and set fans blowing outwards for several days until the floors and walls were dry.

Once the rooms were empty, clean and dry, he contacted WHD on LINE with photos, room sizes and the height the water had reached. The team helped him plan a date and a room-by-room sequence. Nobody stayed in the building during treatment. After the rest and ventilation period, Ek repainted, installed new furniture and told tenants exactly what each room had been through. A tenant with a small child said that what convinced her to move back was that her room did not smell musty, unlike other rooms in the soi that had simply been painted over.

The lesson is that order matters more than speed. Rushing to ozone a room that is still wet and still has soaked mattresses inside will not give results as good as drying the space and removing damaged items first.

Recovery Checklist for Nakhon Nayok Town Homes, Before and After Ozone

Before going back in

• Follow official updates on town water levels and drainage, and wait until the water has truly receded and roads are safe.
• Switch off power at the breaker before entering. If sockets or the consumer unit were under water, have an electrician check before use.
• Wear boots, rubber gloves and a mask, and cover any cuts on your legs and feet.

During washing and drying

• Remove all mud, especially under counters, under stairs and behind cabinets.
• Discard absorbent items that cannot be cleaned: mattresses, pillows, carpets, soft toys, cardboard boxes and any food that touched floodwater.
• Wash floors and walls with clean water and detergent, then disinfect surfaces following the product label. Never mix different cleaning products.
• Open front and back windows of the shophouse to create a through-draught, and set fans to push humid air outside.
• Cut out swollen drywall, plywood or skirting and let the structure behind dry before closing it up.
• Wash kitchenware with hot water or detergent, and drink bottled water until you trust the tap supply.

Before and after ozone

• Confirm the space is empty and dry, with no people, pets or plants inside.
• Switch off air conditioning and fans, and seal gaps where ozone could leak into occupied rooms.
• After treatment, wait for the full rest and ventilation period the team specifies before entering.
• Open windows for extra airing before bringing back washed bedding and clothes.
• Keep watching previously damp spots for several weeks. If damp patches or black spots return, there is still a water source to fix at the root.
• If anyone develops fever, calf pain, severe diarrhoea or breathing difficulty, see a doctor immediately.

FAQ: Ozone Disinfection After the Flood in Nakhon Nayok Town

Q: The water in Nakhon Nayok town has not gone down yet. Can I book ahead?
A: You can talk to the team in advance on 065-556-6294 or LINE @whd268, but the actual treatment should happen after the water has receded and the space has been cleaned and dried. The team confirms date and travel based on real road conditions.

Q: Does WHD have a branch in Nakhon Nayok?
A: No. WHD is based in Bang Khae, Bangkok. Service in Nakhon Nayok town is arranged by appointment, with coverage confirmed by phone or LINE first.

Q: Can ozone replace cleaning the house?
A: No. Ozone does not remove mud or dry walls. You must always remove mud, wash, discard damaged items and dry the space first. Ozone is an additional step that deals with germs and odours where washing cannot reach.

Q: Can family members stay upstairs during treatment?
A: They should not. Shophouses have stairwells and vents that connect floors, so ozone can rise. Everyone, along with pets and plants, must leave the building during treatment 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. Multi-storey shophouses or dormitories with many rooms take longer in total, depending on the number of zones.

Q: Are there any promotions?
A: Ozone jobs of 15,000 baht or more come with a free medical-grade disinfectant spray. Ask the team for the latest details.

Talk to WHD About Ozone Treatment for Homes, Shophouses and Dormitories in Nakhon Nayok Town

Send photos, floor area and the flood height so the team can assess the job and plan a suitable date.

View the Ozone Service and Get Advice

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

Related Services and References

• Residential and building ozone disinfection
• Disinfection service
• Removing chemical residue with ozone
• Contact us

References

• Thairath: water in Nakhon Nayok town still 40-50 cm deep while outskirts recede (late September 2026)
• Thai PBS (30 Sep 2026): thaipbs.or.th/news/content/558685 and thaipbs.or.th/news/content/558912
• Bangkok Biz News summary of the DDPM report (2 Oct 2026): bangkokbiznews.com/news/news-update/1254629
• Khaosod English (29 Sep 2026): More than 2.6 million people affected by floods across Thailand
• CDC: Floods and your health · WHO: Fact sheets