A typical scenario (an illustrative example, not a review from a specific customer)

A night-shift worker's rental room in Si Maha Phot, and waking up congested every afternoon

Ek, 32, works the night shift at a factory in Si Maha Phot district, Prachin Buri. He rents a ground-floor room in a two-storey rental building with his wife and their three-year-old son. In late September, after days of heavy rain, water from the fields and the drainage ditch beside the building rose across the front yard and into the room, ankle-deep, staying for three or four days before draining away.

The landlord hired workers to hose down the yard and walkways. Ek and his wife mopped the floor with ordinary floor cleaner, put the damp-edged mattress outside to dry, and moved back in, because they had nowhere else to go and Ek had to work every night. Working nights means sleeping by day in a room with the curtains drawn and the air conditioner running. Within days he began waking up with a blocked nose, a scratchy throat and headaches. Their son developed a red rash on his legs and had diarrhea for a day. His wife spotted black dots on the wall behind the bed and a sour, musty smell inside the wardrobe that clung to his work uniforms.

This is the reality in many workers' rental rooms across Prachin Buri after the water drops. Tenants cannot stop working or move out, so they go back into rooms that are still damp. Landlords want tenants back as quickly as possible. When a room is sealed and air-conditioned while its walls and mattress are still wet, mold and bacteria grow fast, and the people hit hardest are those who spend the most hours inside.

Prachin Buri flood 2026: seven districts, 39,977 households

According to the DDPM report of 2 October 2026, flooding nationwide affected 31 provinces plus Bangkok, with 1,245,581 households and 3,535,206 people affected. The causes were persistent heavy to very heavy rain combined with large volumes of water from the North.

For Prachin Buri in the eastern region, Thai PBS, citing DDPM, reported seven affected districts: Kabin Buri, Si Maha Phot, Na Di, Mueang Prachin Buri, Prachantakham, Ban Sang and Si Mahosot, totaling 39,977 households. This is a snapshot from the time of reporting, and figures may change daily, so keep following provincial and DDPM announcements.

The Prachin Buri River is the province's main waterway, collecting water from upland areas before flowing down across the lower plain. Riverside communities in Mueang and Ban Sang have many wooden riverside homes and houses raised on stilts. Kabin Buri and Si Maha Phot mix farmland with industrial zones, so they have dense clusters of rental rooms, dormitories and housing estates for workers. Na Di and Prachantakham combine farming areas with communities close to forest and hills.

That variety means there is no single recipe for flood recovery in Prachin Buri. Wooden riverside houses struggle with mold inside the timber. Concrete rental rooms struggle with damp walls and sealed, poorly ventilated spaces. Shops and workplaces are under pressure to reopen quickly. Yet the principle is the same everywhere: clean thoroughly, dry completely, and then disinfect.

Every kind of germ that floodwater brings to Prachin Buri, and the symptoms to watch

Before reaching a house, floodwater in Prachin Buri flows over rice fields, orchards, communities and the areas around factories. It brings silt, animal droppings, septic tank overflow and all kinds of rubbish. The germs it carries fall into several main groups.

Intestinal bacteria: E. coli, Salmonella, Shigella

These come from human and animal feces. When septic tanks in rental buildings or housing estates overflow, the bacteria spread with the water and stick to floors, lower walls, kitchen cupboards and anything that was submerged. Small rental rooms where people cook in the same space they sleep are especially at risk. Symptoms include diarrhea, cramps, nausea, vomiting and fever. Young children and older people can become dehydrated quickly.

Leptospirosis in farm and community areas

Rats from rice fields and communities flee the water into houses and buildings. Their urine carries Leptospira bacteria into water and mud. Wading or cleaning without boots lets the bacteria in through wounds and softened skin. Key signs are sudden high fever, headache and severe calf pain, sometimes with red eyes or yellowing skin. If these appear about one to two weeks after flood exposure, see a doctor right away and mention that you waded through floodwater.

Viruses: from stomach bugs to colds

Norovirus and rotavirus are major causes of vomiting and diarrhea after floods, spreading via hands, food and surfaces. Respiratory viruses move easily when people are crowded together, such as tenants from several ground-floor rooms bunking upstairs, or families staying in shelters. Conjunctivitis and water-related foot and skin infections are also common.

Mold: thriving in sealed, air-conditioned rooms

WHO and CDC advise cleaning and drying within 24 to 48 hours after floodwater recedes to limit mold. In a rental room with blackout curtains and air conditioning, the AC may pull some moisture out of the air, but if plaster walls, mattresses and plywood wardrobes are still soaked, mold keeps growing inside them, and spores circulate in a room with little fresh air. Symptoms include congestion, sneezing, coughing, sore throat, headaches, itchy rashes and asthma flare-ups.

Musty and sewage odors: a sign germs are still active

A musty smell comes from mold and bacteria in materials that are still wet. A rotten or drain-like smell comes from mud trapped in pipes, under floors and in wall gaps. These smells soak into clothes, curtains and mattresses, so people carry them to work. Masking them with perfume does not remove the cause.

At-risk groups in Prachin Buri

Beyond elderly people, young children, pregnant women and those with chronic illness, Prachin Buri must also look after shift workers who sleep for long hours in closed rooms, and people who clean their homes after long working days without enough rest, which lowers immunity and makes infection more likely.

The impact on Prachin Buri families when homes and rentals are not fully disinfected

Health: chronic allergy and respiratory symptoms, repeated diarrhea in children, skin problems, and leptospirosis risk for people who waded to work.

Income: workers who fall ill must take leave and may lose wages and attendance bonuses. Landlords lose tenants, and shops lose customers because of the smell.

Costs: moldy mattresses, wardrobes and clothes must be replaced, and walls painted over mold must be redone.

Time: full-time workers already have little free time, and scrubbing mold every day off means no real rest.

Family and confidence: worrying that a toddler will get sick, smelling musty at work, and feeling that home is no longer clean all affect the whole family's quality of life.

What many Prachin Buri households try, and why it does not end the problem

Mopping with ordinary floor cleaner. The floor looks clean, but germs in walls, wardrobes and mattresses remain, and nothing is done about the air.

Strong bleach. It works on smooth surfaces but does not penetrate plaster or plywood. Used in a small sealed room or mixed with other products, it produces fumes harmful to the lungs. Follow Department of Disease Control guidance.

Sealing the room and switching on the AC straight away. The AC removes some moisture from the air but does not dry walls or mattresses, and an unwashed unit can keep recirculating spores.

Air freshener sprays and odor blocks. These hide the smell for a short time while the germs stay.

Painting over mold before walls are dry. The stains vanish briefly, then return with blistering paint.

All of these treat the surface, while post-flood germs live in the air, in corners and in porous materials. What is missing is a step that covers the whole room after it is clean and dry. That is the role of ozone.

Ozone disinfection in Prachin Buri with WHD: how it works and how it stays safe

World Health Disinfection (WHD) provides ozone disinfection for homes and buildings, including houses, condos, dormitories, hotels, offices, factories, schools and hospitals. The office is in Bang Khae, Bangkok 10160, and there is no branch in Prachin Buri. The team can plan service in the province, with travel, coverage and timing confirmed by phone at 065-556-6294 or LINE @whd268 in advance. Same-day arrival is not guaranteed.

Ozone (O3) is a gas with strong oxidizing power. It breaks down bacterial cell structures, virus envelopes and mold spores, and it breaks apart odor molecules. When its work is done it reverts to oxygen (O2), so there is no chemical residue. According to test results certified for the company by the Department of Medical Sciences and Intertek (UK), it eliminates viruses, bacteria and mold by 99.99%.

For workers' rental rooms in Kabin Buri and Si Maha Phot, the advantage is that ozone gas reaches behind wardrobes, under beds, inside opened closets and into ceiling corners that cloths cannot reach, and treatment can be scheduled room by room around tenants' shifts. In wooden riverside homes in Ban Sang and Mueang, the gas penetrates the gaps between boards and the spaces beneath floors.

Treatment steps

1. Remote assessment: send photos, water height, flood duration and room count on LINE, and the team helps define zones.
2. Always clean and dry first: remove mud, discard damaged items, wash, disinfect surfaces and ventilate until dry.
3. Clear people and animals: people, pets and plants leave the zone; doors and windows are closed; cupboards and drawers opened.
4. Fill and contact time: a typical cycle is about 30 minutes per zone.
5. Rest and ventilate: wait for the ozone to break down, air the room, then go back in.

Remember: ozone is used only in a closed, empty room. No people, pets or plants inside during treatment, and re-entry only after the rest and ventilation period the team specifies.

For workplaces and larger buildings, see disinfection service and ozone cleaning service.

10 reasons Prachin Buri homes and rentals should be ozone-treated after the flood

1. Ideal for sealed rooms. Rentals with few windows and poor airflow benefit from a gas that spreads through the whole space.
2. Many germs in one pass. Bacteria, viruses and mold at 99.99% according to the company's certified tests. See residential ozone disinfection.
3. Removes smells from clothes storage and bedding areas. It breaks down musty odor in rooms and opened wardrobes.
4. No chemical residue. Ozone returns to oxygen, so the room is safe to use after ventilation.
5. Scheduled around shifts. About 30 minutes per zone, timed for when tenants are at work.
6. Reaches the gaps in riverside wooden houses. Well suited to timber homes in Ban Sang and Mueang Prachin Buri.
7. Less chance of mold returning. When done after drying with ongoing humidity control.
8. Helps shops and workplaces reopen with confidence. Customers and staff no longer put up with musty air. More on the ozone service page.
9. Verifiable test results. See the certificates page.
10. Good value for multi-room landlords. Ozone jobs of 15,000 baht or more include a free medical-grade disinfectant spray.

Before and after: a ground-floor rental room in Prachin Buri

Note: results depend on washing and drying before treatment. Soaked mattresses and rotten materials should be replaced, and illness needs a doctor.

Example case: a two-storey wooden house on the Prachin Buri River in Ban Sang

An illustrative example to explain the process, not a real customer review.

Grandma Boonmee, 78, lives in a two-storey wooden house beside the Prachin Buri River in Ban Sang district, with her daughter who works in the provincial town. The ground floor holds a wooden-floored living room and the kitchen. When the river overflowed, water rose to about knee height downstairs and stayed for several days. Grandma moved upstairs, while her daughter waded out to work every day.

When the water receded, the daughter took three days of leave. She shoveled out the mud, threw away a fabric sofa and rugs that had soaked, washed the wooden floor and walls with clean water and detergent, opened every window and ran fans for several more days until the boards were dry. Still, a musty smell rose from between the floorboards, and Grandma, who already had allergies, began coughing more at night.

The daughter contacted the WHD team on LINE, sent photos of the house and explained her mother's allergies. The team suggested two zones, the entire ground floor and the upstairs bedroom where the smell had drifted, and arranged a date to travel to Prachin Buri. On the day, Grandma spent half a day at a neighbor's house in the same lane. The team treated one zone at a time and told the family when they could return after the rest and ventilation period.

The family noticed that the musty smell from the floorboards was clearly reduced. Even so, the team advised the daughter to take Grandma to a doctor to check her cough, and to get checked herself if she developed fever or calf pain after days of wading to work. Ozone helps the house. It does not treat illness in people.

Advice for landlords, shop owners and small workplaces in Prachin Buri

Landlords: do not rush tenants back into rooms with damp walls and floors. If possible, offer a spare upstairs room or an unflooded room as temporary accommodation, and restore ground-floor rooms in batches. Record for each room the date it was washed, the date it was dry and the date it was disinfected, so you can communicate openly with tenants.

Shops and restaurants: give extra attention to food preparation areas, refrigerators, shelving and stockrooms. Any food products that touched floodwater should be discarded, not sold. Utensils must be washed and disinfected before use.

Offices and small workplaces: separate wet documents from working areas. Office carpets that soaked usually need replacing, and air-conditioning systems should be cleaned by a technician before use. After that, plan zone-by-zone ozone treatment on a day off or after hours so work is not disrupted.

In every case: staff or tenants with fever, calf pain, diarrhea or a rash after the flood should be encouraged to see a doctor, and employers should allow them leave to get treatment.

Prachin Buri flood recovery checklist

Before going back in

• Follow provincial and DDPM announcements to confirm that levels in the Prachin Buri River and its tributaries are falling.
• Turn off power at the breaker and have an electrician check wiring, air conditioners and pumps.
• Wear boots, rubber gloves and a mask, and cover all wounds.
• Watch for snakes and venomous creatures hiding under belongings.

Washing and drying

• Remove mud and discard porous items that cannot be cleaned, such as mattresses, pillows, rugs and fabric sofas.
• Wash floors, walls and dishes with clean water and detergent, then disinfect surfaces according to the Department of Disease Control and Department of Health.
• Wash clothes that got wet or smell musty, in hot water where possible, and dry them completely.
• Open doors and windows, use fans, and do not seal the room and run the AC before walls and floors are dry.
• Flush drains and grease traps to cut sewage odors.

Treatment day

• All people, pets and plants leave the zones being treated.
• Open wardrobes and drawers; close doors and windows.
• Return only after the rest and ventilation period.

After ozone

• Ventilate daily, control indoor humidity, and service the air conditioner regularly.
• Repair roof and wall leaks.
• Watch everyone's health. Fever, calf pain, diarrhea or breathing difficulty means see a doctor at once.

FAQ: ozone disinfection in Prachin Buri after flooding

1. Does WHD have a branch in Kabin Buri or Si Maha Phot?

No. WHD is based in Bang Khae, Bangkok, but can plan service in Prachin Buri. Travel and coverage are confirmed by phone at 065-556-6294 or LINE @whd268.

2. How long must tenants stay out of a rental room?

They must leave during treatment and the rest and ventilation period. A typical cycle is about 30 minutes per zone, plus preparation and ventilation. The team gives a clear time to return.

3. Does ozone mean the air conditioner does not need cleaning?

No. An AC unit in a damp or moldy room should still be cleaned by a technician. Ozone is an extra step, not a substitute for servicing equipment.

4. Should clothes be removed from the wardrobe?

Wet or dirty clothes should be washed and dried first. Leave the wardrobe open during treatment so the gas can reach inside. The team will explain how to prepare the room.

5. Can shops or offices use the service?

Yes. WHD serves homes, offices, factories and other buildings, provided the area can be closed and is empty during treatment.

6. I have a fever and calf pain after wading to work. What should I do?

See a doctor immediately and mention that you waded through floodwater, because it may be leptospirosis. Ozone is not a medical treatment.

7. Is there a promotion?

Ozone jobs worth 15,000 baht or more receive a free medical-grade disinfectant spray.

Talk to WHD about ozone disinfection in Prachin Buri

Send photos of your home, rental rooms or workplace on LINE. The team will assess, define zones and plan travel to Prachin Buri with you.

See the Ozone Disinfection Service

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

Related services

• Residential and building ozone disinfection
• Disinfection service
• Ozone disinfection machines
• Contact us

References

• Thai PBS flood report: thaipbs.or.th/news/content/558960
• Bangkokbiznews, DDPM flood situation: bangkokbiznews.com/news/news-update/1254629
• CDC Floods: cdc.gov/floods
• WHO fact sheets: who.int/news-room/fact-sheets
• Department of Disease Control, Thailand: ddc.moph.go.th