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

A Khlong Khlung school that served as a shelter, and the question before pupils return

Director Wilai runs a medium-sized school in Khlong Khlung district. Its two-storey building stands on slightly higher ground than the surrounding village, so when the water rose in late September the upper floor became temporary shelter for dozens of families, including older people, toddlers and bedridden patients. The ground floor, with knee-deep water, held donated goods, and the canteen became a central kitchen where volunteers packed hundreds of meals a day.

Upstairs classrooms turned into shared bedrooms covered in mats, blankets and bags of clothes. The school toilets served many times their usual number of people, sometimes without running water. Some days several children had diarrhoea and some older people had lingering coughs; public-health staff visited regularly to check on everyone.

In early October the water began to fall and families went home. Director Wilai and her teachers shovelled mud out of the ground floor, threw away wet cardboard and mats, washed the toilets and scrubbed the canteen. But one question remained. For weeks this building had been a dormitory, a field kitchen and a wet storeroom. It held flood germs, germs from many people living close together, and damp that was already staining the ground-floor walls with mold. What else should the school do before hundreds of pupils come back?

The same question faces temples that opened their halls to evacuees, sub-district halls used as relief points, flooded market stalls and rice mills with wet paddy across both districts.

Flooded areas in Kamphaeng Phet according to the DDPM

According to the Department of Disaster Prevention and Mitigation (DDPM) report dated 2 October 2026, two districts of Kamphaeng Phet were affected, a combined 3,128 households, and water levels were falling.

The 3,128 figure is the combined total for both districts in that report; our source does not split it by district. Figures change daily, and even as levels fall some low-lying villages may still hold standing water. Check the latest DDPM, district and local-government announcements before going back into buildings.

Nationally, the DDPM reported on 2 October 2026 that 31 provinces plus Bangkok were affected, 1,245,581 households or 3,535,206 people, from heavy to very heavy rain plus runoff from the north. Kamphaeng Phet, crossed by the Ping River, lies on the path that northern water takes toward the central plains, so many provinces along the river are recovering at the same time.

The right order: wait for officials to say it is safe, check the electrics, remove mud and clean, dry out, and only then spray. Disinfection is the final step that lowers germs after cleaning, not the first.

Why shared-building recovery in Kamphaeng Phet needs a system

With more than three thousand households affected, many shared buildings were worked much harder than usual during the flood. Schools, temples and multipurpose halls often become shelters, donation points and central kitchens, with many people eating, sleeping and sharing toilets in limited space. When the water falls, these buildings must turn back into classrooms and places of worship, which means dealing both with germs from the floodwater and germs built up by crowded living.

The economies of Khanu Woralaksaburi and Khlong Khlung are tied to farming. Rice mills, paddy-buying yards, fertiliser stores and farm-supply shops attract rats and are often reached by water. Wet paddy and sacks of produce bring rotting smells, mold and food for rats, so leptospirosis risk for workers is higher here than in many other places.

Both districts also sit on a main road used by travellers between the north and the central region. Restaurants, petrol stations and roadside shops serve strangers every day who use their toilets and eat their food. These places must be clean before welcoming customers again, for public health and for their reputation.

The many germs and the mold after the Kamphaeng Phet flood

Floodwater in farming areas mixes contamination from septic tanks, animal pens, drains, rubbish heaps and field soil. Add crowded shelters and there are several germ groups to watch.

Faecal bacteria: E. coli and Salmonella

E. coli is a gut bacterium used as an indicator of faecal contamination in water; when septic pits flood, it spreads everywhere. Salmonella usually comes from poultry and livestock waste, common in farming communities. Both cause diarrhoea, stomach pain, vomiting and fever. The highest-risk spots are canteens, central kitchens, temple kitchens and market food stalls.

Leptospirosis in rice mills and paddies

Mills, granaries and drying yards are home to many rats. In a flood, Leptospira bacteria from their urine mix into water and mud and enter through cuts or long-soaked skin. Mill workers, farmers and volunteers moving goods are most at risk. Symptoms include sudden high fever, headache, muscle pain especially in the calves, and red eyes. Anyone with these after flood contact must see a doctor immediately and mention wading.

Gut viruses: norovirus and rotavirus

In shelters and schools full of people, norovirus and rotavirus spread fast. They survive on surfaces, door handles, taps and toilets, and a tiny dose causes illness. A building just used as communal sleeping space needs serious disinfection of touch points and toilets before normal use.

Respiratory viruses: RSV, influenza and hand-foot-mouth disease

Sleeping together in poorly ventilated rooms in damp, cool rainy-season air lets RSV and influenza spread easily, especially among young children and older people. Hand-foot-mouth disease spreads in childcare centres through toys and shared floor space. Classrooms that served as bedrooms need thorough cleaning and disinfection before lessons resume.

Mold on paddy, sacks, walls and wooden furniture

Mold is the longest-lasting effect. Wet paddy, jute sacks and timber mold quickly. Indoors, lower walls, gypsum ceilings, wooden doors and cupboards show stains within days if not dried. The CDC advises cleaning and drying within 24 to 48 hours to limit mold. Airborne spores cause coughing, sneezing and breathing trouble in people with allergies or asthma and in older people.

Musty, sewage and fermenting-paddy smells

Post-flood smells come from mold, sewage and fermenting produce. They signal that a source of germs remains. Masking them does nothing; remove damaged materials and produce, wash, dry and disinfect.

Who is most at risk in Khanu Woralaksaburi and Khlong Khlung

Pupils returning to classrooms that were flooded or used as dormitories; older and bedridden people who stayed in shelters and have weaker immunity; pregnant women and chronic patients who visit health facilities often; mill workers and farmers in direct contact with water, mud and wet produce; volunteers and cooks who ran central kitchens; and market vendors handling fresh food all day. Each group needs both personal hygiene and clean shared spaces.

Shared places in Kamphaeng Phet to spray before reopening

What follows if shared buildings skip disinfection

Health across the sub-district: shared buildings are where families meet. Germs left behind spread widely, from sick classmates to older people whose allergies flare after a temple visit, to mill workers with persistent fevers, adding to the load on families and clinics already coping with the flood.

Income and harvest: the weeks after a flood often run into rice-harvest season. If mill workers or farmers fall ill together, buying and milling stall. Roadside restaurants with sick or complaining customers lose passing trade quickly.

Time and budget: painting over moldy walls or storing damp mats back in cupboards means cleaning twice and buying again. Schools and temples on tight budgets should get it right the first time.

Parent and community trust: parents who know their child's classroom was a dormitory for dozens of families will want to know what the school has done. A clear wash, dry and spray process lets the school answer openly.

Why ordinary washing is not enough for buildings that were both flooded and used as shelters

Floors washed, touch points forgotten: many sites shovel mud and wash floors but miss door handles, light switches, taps, stair rails and table edges that shelter residents touched all day.

Guesswork chemicals: bleach that is too strong damages surfaces and irritates lungs; too weak does little; mixing with other cleaners is dangerous.

Too big to wipe by hand: canteens, sermon halls and mill warehouses can cover hundreds of square metres.

Closing up too soon: shutting rooms with damp walls lets mold grow in the dark.

Masking smells: air freshener and incense do not reduce germs and may make a place seem clean when it is not.

WHD's disinfection spraying service for sites in Kamphaeng Phet

World Health Disinfection (WHD) provides disinfection spraying by trained technicians. According to the service information, the team sprays and/or ULV-fogs (Ultra Low Volume, a very fine mist) to spread disinfectant over surfaces throughout a building after mud removal and cleaning.

The disinfectant is CHEMGENE HLD4H, a medical-grade product from the UK containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. The service page lists viruses, bacteria and fungi including COVID-19, RSV, H1N1, H5N1 and hand-foot-mouth virus, claims 99.99% effectiveness, and lists approvals or endorsements from the Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019. Listed customers include hospitals, schools, malls, airports, offices, airlines, banks and residential buildings.

The process

1. Contact and share details: call 065-556-6294 or LINE @whd268 with your district, sub-district, building type, size and photos.
2. Confirm dates and travel: WHD is based in Bang Khae, Bangkok, with no branch in Kamphaeng Phet. Service in Khanu Woralaksaburi or Khlong Khlung is confirmed by phone or LINE, and same-day arrival cannot be promised.
3. Prepare the site: remove mud and damaged goods and produce, dry the building, store food and utensils, and get people and pets out.
4. Technicians spray shared touch points and ULV-fog wide areas.
5. Wait about 30 minutes per the service information, then return at the time advised.
6. Resume normal use with an ongoing cleaning plan.

Per the service information, customers receive a free CHEMGENE spray bottle and WELLGIENIC wet tissues, and a tax invoice is available, convenient for schools, local government bodies, rice mills and businesses.

Safety: people and pets leave the sprayed zone during application and return when the technicians advise. Spraying follows mud removal and cleaning, does not replace them, and is not medical treatment. Anyone who is ill must see a doctor.

How spraying and ULV fogging reach surfaces after cleaning

Rural shared buildings are typically large, with high ceilings and many pillars and wooden beams: sermon halls, school canteens, mill warehouses. ULV fogging creates fine droplets that hang in the air for a while and then settle evenly on table tops, chair legs, the gaps around pillars and walls above arm's reach.

Because the liquid is measured, a building you have just dried is not soaked again. For direct-contact points such as taps, toilets, handles and grab rails, technicians add targeted spraying. Together the two methods cover both the wide area and the high-risk spots.

If a room still smells musty after spraying, such as a records room or staff room with little airflow, WHD's ozone disinfection service can be considered as a complement.

10 reasons schools, temples, markets and rice mills in Kamphaeng Phet should spray after the water falls

1. Built for buildings that were flooded and also used as shelters, with germs from many sources.
2. Fewer germs in toilets and on shared touch points used heavily during the flood.
3. Bacteria, viruses and fungi as listed on the disinfection service page.
4. Suited to wide, high-ceilinged spaces like temple halls, canteens and warehouses.
5. Medical-grade CHEMGENE HLD4H from the UK.
6. Trained technicians working in sequence with safety in mind.
7. About 30 minutes of waiting per the service information, so schools and shops reopen sooner.
8. Helps schools reassure parents that the building has been disinfected.
9. Tax invoice available, plus a free CHEMGENE spray and WELLGIENIC wet tissues per the service page promotion.
10. Helps the whole sub-district recover together, because shared buildings serve every family.

Before and after: what shared buildings in Kamphaeng Phet often look like

Note: results depend on washing, drying and ongoing care. Long-soaked or deeply moldy materials may need replacing.

Example case: a mid-sized rice mill in Khanu Woralaksaburi

(An illustrative example, not a real customer review.)

Mr Prasert owns a mid-sized rice mill in Khanu Woralaksaburi district. At the front is a paddy-buying office; to the side are a storage warehouse and eight worker rooms with a shared kitchen and shared toilets. During the flood, water rose to mid-shin in the warehouse and worker rooms, some of the bottom paddy got wet, and many rats fled the water into the buildings.

When it fell, he had workers in boots and gloves move the wet paddy out to be dealt with separately, shovel mud, wash the warehouse floor and scrub the toilets. But the worker rooms still smelled musty, the kitchen walls showed water lines, and the new-season paddy would soon arrive. He did not want his team down with leptospirosis or diarrhoea just as work peaked.

He worked in order: repaired the wiring, opened the warehouse until it dried, replaced wet ceiling boards, then booked spraying for the office, worker rooms, kitchen and toilets. On the day, all workers left the buildings; technicians sprayed touch points and ULV-fogged the rooms and kitchen. After the advised wait, workers washed kitchen utensils again before use. Mr Prasert also told everyone to wear boots in the warehouse and to see a doctor at once with any fever or calf pain.

His summary to the team: spraying is one step among many and replaces neither washing nor protection, but it left the rooms and kitchen everyone shares in better shape before the busy season.

Recovery checklist for shared buildings in Khanu Woralaksaburi and Khlong Khlung

For buildings used as shelters

• Remove wet or dirty mats, blankets and donated items; wash or discard.
• Clean toilets, bowls and sinks thoroughly.
• Clean the central kitchen, utensils and food storage.
• Ventilate for several days before setting classrooms back up.

Before spraying

• Wear boots, rubber gloves and a mask while clearing mud, and cover cuts.
• Have an electrician check circuits before switching on.
• Remove all mud, discard long-soaked porous items, and move wet produce out of buildings.
• Throw away food that touched floodwater.
• Dry the space as much as possible with open windows, fans or dehumidifiers.
• Store food, utensils and documents and tell building users the spraying date.

After spraying

• Return at the time advised and ventilate.
• Wash food-contact surfaces and utensils before use as advised.
• Wipe shared touch points regularly in the first weeks after reopening.
• Check weekly for new mold and remove rat shelter.
• Set up soap handwashing points at canteens, toilets and entrances.
• Watch children, older people and workers; high fever, calf pain, severe diarrhoea or breathing trouble mean seeing a doctor.

FAQ: post-flood disinfection in Kamphaeng Phet

Does WHD have a branch in Kamphaeng Phet?

No. WHD is based in Bang Khae, Bangkok. For Khanu Woralaksaburi or Khlong Khlung, contact 065-556-6294 or LINE @whd268 to assess the job and confirm travel. Same-day arrival cannot be promised.

Our school was a shelter. Where should spraying start?

With toilets, the canteen or central kitchen, rooms used for sleeping, and touch points such as door handles, stair rails, taps and switches, after washing and drying.

Can spraying replace mud removal?

No. Mud and grime must come off first or they block the disinfectant from the surface.

Must we leave the building during spraying?

Yes, people and pets. Per the service information, wait about 30 minutes, then return when the technicians advise.

Is there no residue at all afterwards?

Do not assume so. Wash food-contact surfaces and utensils as advised before use, and ventilate after spraying.

Can you spray a rice warehouse?

Describe the warehouse, the produce stored and how it is used so the team can assess it first. Stored produce should be moved or covered as advised, and flood-soaked produce handled according to guidance from the relevant authorities.

What if someone falls ill after the flood?

See a doctor or the local health centre, especially with high fever, calf pain after wading, non-stop diarrhoea or breathing difficulty, and mention flood exposure. Spraying is not a medical treatment.

The water is falling: plan your Kamphaeng Phet flood disinfection today

Schools, shelters, temples, markets, rice mills, restaurants and public offices in Khanu Woralaksaburi and Khlong Khlung can contact WHD to assess their sites and plan spraying once the mud is cleared.

See the Disinfection Service

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

WHD is based in Bang Khae, Bangkok. Travel to Kamphaeng Phet is confirmed by phone or LINE.

Related links

• World Health Disinfection spraying service
• CHEMGENE HLD4H disinfectant
• Residential ozone disinfection

References

• Bangkokbiznews flood summary based on DDPM reports: bangkokbiznews.com/news/news-update/1254629
• Thai PBS flood report: thaipbs.or.th/news/content/558960
• World Health Organization fact sheets: who.int/news-room/fact-sheets
• CDC Floods: cdc.gov/floods
• Thailand Department of Disease Control: ddc.moph.go.th