A typical scenario (an illustrative example based on common situations, not a review from a specific customer)

The smell of wet bamboo that would not leave the space under the house

Auntie Somjai lives in a half-timber, half-concrete stilt house in one of the subdistricts of Phanat Nikhom. For decades the open space beneath the house has been her workshop and storeroom: baskets, winnowing trays, rice containers and bundles of split bamboo strips that she and her daughter weave and sell for extra income. When heavy rain fell day after day at the end of September, water crept across the yard and then rose under the house, soaking a stack of finished pieces that were waiting to go to a buyer. She managed to carry some of them upstairs.

When the water went down, her son, who works shifts at a factory in one of Chonburi's industrial zones, came home to help. They shovelled out the mud, hosed the floor and poured bleach into the corners. On the first evening the house looked clean. Three or four days later the smell came back: something between rotting straw and a drain. Black specks appeared on the bamboo strips drying in the yard. A white, fuzzy bloom spread across the timber wall that never gets direct sun. Her six-year-old granddaughter, who already has allergies, began coughing at night, and the upstairs bedroom started to smell like laundry that had never quite dried.

The problem in Auntie Somjai's house was not simply that it had not been cleaned well enough. Floodwater had pushed several groups of microorganisms deep into porous materials such as wood, bamboo, rattan, fabric, foam and plaster, where a splash of disinfectant on the surface cannot reach. The air in closed rooms had also become a reservoir for mold spores and odour molecules. The same story plays out in many homes across Phanat Nikhom, whether they are traditional wooden houses, two-storey shophouses in the old town, or newer estate homes that flooded for the first time.

Where the Flood Hit in Phanat Nikhom: What the Official Figures Say

This section only summarises officially reported facts.

• According to the Department of Disaster Prevention and Mitigation (DDPM) report of 2 October 2026, Phanat Nikhom is one of 10 districts in Chonburi Province affected by flooding: Mueang Chonburi, Sattahip, Phanat Nikhom, Si Racha, Bang Lamung, Ban Bueng, Nong Yai, Ko Chan, Phan Thong and Bo Thong.
• The DDPM reported 118,723 affected households across Chonburi Province, and the situation on that date was that water levels were still rising.
• No district-level breakdown is available for Phanat Nikhom in the reports we cite. The figure of 118,723 households therefore refers to the whole of Chonburi Province, not to Phanat Nikhom alone.
• Nationally, the DDPM reported on 2 October 2026 that flooding affected 31 provinces plus Bangkok, a total of 1,245,581 households and 3,535,206 people, caused mainly by heavy to very heavy rain combined with runoff from the north.

These numbers change every day. Follow the latest announcements from the district office, your local administration and the Chonburi DDPM office first. This article helps you prepare for the period after the water recedes, when health problems and odours usually start to show.

Phanat Nikhom lies inland from the Chonburi coast. It has an old town centre with shophouses and markets, farmland with rice fields, field crops and orchards, and many homes where weaving bamboo and rattan is a long-standing side occupation. Housing is varied: raised wooden houses with open ground floors, half-timber homes, two-storey shophouses, and estate housing that has grown with Chonburi's industrial economy. Each type of building suffers differently after a flood and needs a slightly different recovery plan.

Every Kind of Germ the Phanat Nikhom Floodwater Brings

Water that has flowed across fields, roads, animal pens, septic tanks and drains before entering a house is not clean rainwater. It carries sewage, soil and decaying organic matter. The World Health Organization (WHO) and the US Centers for Disease Control and Prevention (CDC) both advise treating floodwater as contaminated. The common threats fall into four groups.

1. Bacteria from sewage and animals

E. coli is the classic indicator of faecal contamination. Some strains cause severe diarrhoea and abdominal cramps, and in young children or older adults they can lead to dehydration quickly. Salmonella often travels on food or kitchenware that touched floodwater and was not washed thoroughly, causing fever, diarrhoea and vomiting. For people in Phanat Nikhom who wade through rice fields and orchards, the bacterium to take most seriously is Leptospira, the cause of leptospirosis, known in Thai as "rat urine fever". It is shed in the urine of rats and some other animals and enters the body through cuts or through skin that has been soaked for a long time. Watch for a sudden high fever, headache and marked pain in the calf muscles, usually within one to two weeks of wading.

2. Viruses that spread fast in crowded homes and shelters

Norovirus and rotavirus cause vomiting and diarrhoea and spread very easily via hands, dishes and contaminated surfaces. Rotavirus is especially common in young children, while norovirus causes outbreaks wherever people live close together, such as temporary shelters or homes where relatives have moved in during the flood. The rainy, cool, humid season is also when influenza and RSV circulate well, particularly when families are packed into closed rooms with poor ventilation and everyone is exhausted from days of moving furniture and scrubbing floors.

3. Mold growing in wood, bamboo and plaster

Mold is the single biggest problem for Phanat Nikhom homes, because so many houses include timber and so many families keep woven goods made of bamboo, rattan or reed. These natural fibres soak up water like a sponge. Once they stay damp for more than a day or two, molds such as Aspergillus, Penicillium and Cladosporium start to grow. WHO and CDC recommend cleaning and drying within 24 to 48 hours to limit mold, but when water levels keep rising and the flood lingers for days, almost every home has already passed that window. Airborne spores cause a blocked nose, coughing, sneezing and itchy eyes, and they can trigger asthma and allergies. People with weakened immune systems can even develop lung infections from mold.

4. Musty and sewage odours

The smell that lingers after a flood is more than a nuisance. Musty odours come from volatile compounds released by molds and bacteria as they break down organic matter. Drain-like or sewage odours come from sulphur compounds and ammonia in sediment trapped in floor joints, along the base of walls and under cabinets. The smell is a warning sign that microorganisms are still active, even if every surface looks clean.

Who is most at risk

Take particular care of older adults, young children, pregnant women, people with chronic illnesses such as diabetes, kidney disease or heart disease, people with allergies or asthma, and anyone taking immunosuppressive medicine. In Phanat Nikhom, many households have grandparents at home with grandchildren while working-age adults commute to industrial jobs. The people who spend the whole day breathing the indoor air are often the most vulnerable ones.

Important: If anyone has a fever, calf pain, persistent diarrhoea, vomiting, difficulty breathing, or a red and swollen wound after wading, see a doctor immediately and mention the flood exposure. Ozone treats the home environment. It is not a medical treatment.

How the Phanat Nikhom Flood Affects Families, Crafts and Income

Health. The most common problems after the water drops are diarrhoea in children, flare-ups of allergies, a persistent night-time cough and itchy skin rashes from contact with water and mud. Many of these keep coming back because the house still harbours germs.

Livelihoods. For basket-weaving households, raw bamboo strips, materials and finished pieces that soaked in floodwater can mold very quickly. A piece with black mold spots cannot be sold, and if it is stored alongside new work, the mold can spread. Market stalls and shophouses selling groceries, dried food or clothes face a similar problem: goods that look undamaged but carry a musty smell that puts customers off.

Time. Many families spend weeks scrubbing the same rooms again and again without solving the problem. Working family members have to take leave to help at home, which is hard for people on factory shifts.

Money. If mold is allowed to spread into the timber frame, the ceiling or built-in furniture, future repair costs can be many times higher than the cost of handling the problem properly from the start.

Why the Usual Clean-Up Methods Are Not Enough

Bleach alone. Bleach works well on smooth, hard surfaces such as tiles and toilets. On porous wood, bamboo and plaster it barely penetrates, and the water in the solution actually adds moisture to materials that need to dry. It must also never be mixed with ammonia or some toilet cleaners, because the combination releases toxic gas.

Fans and waiting. Fans dry the surface quickly, but moisture remains inside timber and masonry. Meanwhile the moving air spreads mold spores throughout the house.

Air freshener and incense. A pleasant scent only masks the musty smell for a while. The source is still there, and some fragrances trigger allergies too.

Painting over mold. Fresh paint makes a wall look clean, but mold keeps growing underneath and soon pushes the paint into blisters that peel away.

Sun-drying woven goods and putting them away. Sunlight helps, but tightly woven strips can still hold moisture and spores inside. Once stacked together in a closed storeroom, the mold returns.

What all these methods miss is the air in the whole room and the gaps and corners that hands and sprays cannot reach. That is the gap ozone fills, once the home has been cleaned and dried correctly.

Post-Flood Ozone Disinfection for Homes in Phanat Nikhom

World Health Disinfection (WHD) provides residential and building ozone disinfection using ozone gas (O3), a powerful oxidiser. Ozone breaks down the cell structures of bacteria, viruses and molds, and it destroys odour molecules in the air and on surfaces. After reacting, ozone reverts to ordinary oxygen (O2), so it leaves no chemical residue. According to the test results the company has had certified by Thailand's Department of Medical Sciences and Intertek (UK), the process eliminates viruses, bacteria and mold by 99.99%.

About service coverage: WHD is based in Bang Khae, Bangkok. We do not have a branch in Phanat Nikhom or anywhere in Chonburi Province. You can contact the team by phone on 065-556-6294 or LINE @whd268 to describe the size of your home and the damage, and to plan a service in Phanat Nikhom. The team will confirm travel, dates and whether your location is covered. We cannot promise same-day arrival, especially while some roads are still flooded or demand is high.

The standard ozone process

1. Survey and plan. The team asks about the floor area, the number of rooms and the materials involved, such as timber, concrete or a storeroom full of woven goods, and divides the house into zones.
2. Prepare the space. All people, pets and plants leave the zone to be treated. Doors and windows are closed, and air conditioners are switched off.
3. Release ozone. The generator fills the room so the gas reaches behind cabinets, under beds, behind curtains and into gaps in furniture.
4. Contact time. Ozone is left to react with germs and odours for the set time. A typical cycle is about 30 minutes per zone.
5. Rest and ventilate. The machine is switched off, ozone decays back into oxygen, and the room is aired before anyone goes back in.
6. Handover and advice. The team explains how to keep humidity down so that mold is less likely to return.

Golden rule: Ozone treatment is carried out only in an empty, closed space. No people, pets or plants may be in the room during treatment, and nobody re-enters until the rest and ventilation period is over. Ozone is a step that comes after mud removal, washing and drying. It never replaces cleaning, repairs or medical care.

10 Reasons Phanat Nikhom Homes Should Consider Ozone After the Flood

1. Ozone is a gas, so it reaches everywhere, including enclosed under-house spaces, the backs of cabinets and the gaps between wooden slats that cloths and sprays miss.
2. It tackles several germ groups in one pass, covering bacteria, viruses and mold, with a 99.99% result in the company's certified tests. See the details on the ozone service page.
3. It removes odours at the source rather than masking them, by oxidising musty and sewage odour molecules.
4. No chemical residue, because ozone turns back into oxygen, which suits homes with small children and older people once ventilation is complete.
5. It helps protect woven-goods storerooms by reducing airborne mold spores in the room where mold most easily jumps from one piece to the next.
6. Short cycles per zone, around 30 minutes, so you can treat the house section by section.
7. No re-wetting, unlike spraying liquid disinfectant onto timber and plaster that have only just started to dry.
8. Well suited to old-town shophouses and shops, helping cut musty smells before reopening to customers. Read more about our ozone cleaning service.
9. Clear safety procedures, from clearing the space to ventilating before re-entry.
10. Good long-term value, because it lowers the chance of mold returning to damage timber frames and furniture. Jobs of 15,000 baht or more receive a free medical-grade disinfectant spray. See the terms on the service page.

Before and After Ozone: What Phanat Nikhom Homeowners Typically Notice

Note: results depend on the condition of the house, remaining moisture and ongoing care. If materials are still wet or there is a leak, mold can come back, so moisture must always be dealt with at the same time.

Example Case: A Two-Storey Shophouse in Phanat Nikhom Town

Example case (an illustrative scenario that happens often, not a review from an identified customer)

Wichai runs a small grocery in a two-storey shophouse in the old centre of Phanat Nikhom. The shop is downstairs and the family lives upstairs. When water stood in the shop for several days at ankle to shin height, cardboard boxes, sacks of rice and the bottom wooden shelves were soaked. Wichai threw away every product the water had touched, which was the right decision: food that has been in contact with floodwater should never be sold or eaten.

After the water went down, the family shovelled out the mud, washed the floor with clean water and detergent, wiped down the metal shelving, tore out the swollen wooden shelves and left the folding steel shutter open for several days until the floor and walls were dry. Yet a drain smell and a musty odour still hung in the shop, and some regular customers mentioned it.

Wichai contacted WHD on LINE, sent photos and gave the floor area. The team advised him to check first that no damp spots remained, then booked a convenient date. On the day, the family moved their pets and plants out of the building. The team treated the shop and the living floor as two separate zones, one at a time, and ventilated each before the family went back in. Afterwards the odour in the shop dropped enough for the family to reopen with more confidence.

The lesson is that success starts with discarding contaminated items, washing and drying. Only then can ozone do its job properly.

Phanat Nikhom Flood Recovery Checklist: Before and After Ozone

While the water is still high

• Follow announcements from the district office, local authorities and Chonburi DDPM, and evacuate if told to.
• Cut the power to the ground floor if water approaches the sockets. Never touch switches while wet.
• Avoid wading. If you must, wear tall rubber boots and cover any wounds completely.

When the water recedes (before ozone)

• Have an electrician inspect the wiring before switching anything on.
• Wear rubber gloves, a mask and boots throughout the clean-up.
• Shovel out mud and discard food, medicine and cosmetics that touched the water.
• Sort mattresses, pillows, rugs and woven goods that soaked for a long time. Pieces with deep mold or rotting fibres should go.
• Wash hard surfaces with clean water and detergent, then disinfect according to the product label.
• Open the windows and use fans or a dehumidifier until materials are genuinely dry.
• Remove swollen materials such as gypsum board, ceiling panels or warped plywood shelving.

On treatment day

• Move people, pets, plants and aquariums out of the zone being treated.
• Open cabinet doors and drawers so ozone can reach inside.
• Switch off air conditioners and point out any rooms with an especially strong smell.
• Wait until the team confirms the rest and ventilation period is over before going back in.

After ozone

• Ventilate daily, especially in the morning.
• Store woven goods in an airy place, raised off the floor and away from walls.
• Watch for new mold in wall corners. If you see it, find the source of moisture first.
• Keep an eye on family members' health, and see a doctor for fever or calf pain.

FAQ: Ozone Disinfection After the Phanat Nikhom Flood

Does WHD have a branch in Phanat Nikhom or Chonburi?
No. WHD is based in Bang Khae, Bangkok. Call 065-556-6294 or add LINE @whd268 to plan a service, and the team will confirm travel and coverage.

Should I book ozone as soon as the water drops?
No. Remove the mud, wash and dry the house first. If it is still wet, mold can return even after treatment. Ozone is the finishing step after cleaning.

Can elderly relatives stay inside during treatment?
Not in the zone being treated. It must be an empty, closed room with no people, pets or plants. They can wait in a completely separate area or outside, and return after ventilation.

Will ozone save moldy basketry?
It reduces spores and odour in the storeroom air, but pieces with mold deep in the fibre or that have started to rot should be discarded. Ozone does not restore damaged goods.

How long does it take?
A typical cycle is about 30 minutes per zone, plus preparation and ventilation. The number of zones depends on the size of the house and the damage.

If someone has a fever after wading, will ozone help?
No. Ozone treats the home, not people. For fever, calf pain or diarrhoea, see a doctor at once and mention the flood exposure.

Is there a promotion?
Ozone jobs of 15,000 baht or more come with a free medical-grade disinfectant spray. Ask the team for details.

Talk to Us About Post-Flood Ozone in Phanat Nikhom

Send photos of your home, the floor area and the spots with odour or mold, and the team will help plan a recovery that suits your house.

See the Ozone Disinfection Service

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

Related Services and References

• Residential and building ozone disinfection
• Ozone cleaning service
• Disinfection service
• Certification documents

References

• Bangkok Biz News, flood situation based on DDPM data, 2 October 2026: bangkokbiznews.com/news/news-update/1254629
• Khaosod English, 29 September 2026: More than 2.6 million people affected by floods across Thailand
• World Health Organization fact sheets: who.int/news-room/fact-sheets
• CDC flood clean-up guidance: cdc.gov/floods
• Department of Disease Control, Thailand: ddc.moph.go.th