A factory canteen in Nong Khae and 400 workers due back on Monday

(A typical scenario based on common real-world situations; an illustrative example, not a review from any specific customer. Numbers in the story are hypothetical.)

Khun Tom is the safety officer at a mid-sized parts factory in Nong Khae district. During the flood, production stopped because water entered the car park, the canteen and the ground-floor locker rooms. At the worker dormitory nearby, several ground-floor rooms also took in water.

When the water receded, management wanted to restart as quickly as possible and told workers to return on Monday. Housekeeping staff and contractors shovelled out mud, washed the canteen floor, scrubbed the toilets and set tables and chairs out in the sun. But three things kept Khun Tom awake: a canteen where hundreds of workers would eat at the same lunch break, locker rooms that were damp and starting to smell musty, and staff shuttle buses that had stood in water for days.

"If ten people have diarrhoea on Monday, it could be fifty by Wednesday, and the line stops again," he told his manager. They agreed that before reopening, every shared area would be sprayed after cleaning, with documentation they could show staff. It is the same challenge many organisations in Saraburi now face as the water goes down.

Flooded areas in Saraburi, according to the DDPM report of 2 October 2026

According to the DDPM report of 2 October 2026, 13 districts in Saraburi were affected, a total of 5,393 households, and water levels were falling. This trend was reported for the province as a whole; some spots may still hold water or drain more slowly. Figures change daily, so follow the latest provincial and DDPM announcements.

• Mueang Saraburi: listed as affected; status: water falling (province-wide trend).
• Nong Khae: listed; status: water falling (province-wide trend).
• Wihan Daeng: listed; status: water falling (province-wide trend).
• Nong Saeng: listed; status: water falling (province-wide trend).
• Ban Mo: listed; status: water falling (province-wide trend).
• Don Phut: listed; status: water falling (province-wide trend).
• Nong Don: listed; status: water falling (province-wide trend).
• Phra Phutthabat: listed; status: water falling (province-wide trend).
• Sao Hai: listed; status: water falling (province-wide trend).
• Chaloem Phra Kiat: listed; status: water falling (province-wide trend).
• Kaeng Khoi: listed; status: water falling (province-wide trend).
• Muak Lek: listed; status: water falling (province-wide trend).
• Wang Muang: listed; status: water falling (province-wide trend).

Nationally, DDPM reported on 2 October 2026 that 31 provinces plus Bangkok were flooded, with 1,245,581 households and 3,535,206 people affected, after heavy to very heavy rain plus runoff from the north. In Saraburi, the Pa Sak River runs through Kaeng Khoi, Mueang Saraburi and Sao Hai, while the western and southern districts are low-lying rice plains, so the province sees both river flooding and standing water on the flats.

Note: the report does not split households by district or name the factories, schools or markets affected. If water entered your building or backed up through drains, treat touched surfaces as contaminated until cleaned and disinfected.

The water in Saraburi is going down: which shared spaces to disinfect first

Saraburi has industrial zones, farmland and tourist areas all in one province. With the water dropping across 13 districts at once, everyone wants to reopen at the same time. Prioritising which spaces to disinfect first makes the best use of labour and budget. We suggest ranking by how many people use a space and how vulnerable they are.

Priority 1: spaces with food and young children

• Childcare centres and kindergartens in every district, especially in low-lying Nong Saeng, Nong Don, Don Phut, Ban Mo and Sao Hai, where single-storey buildings are likely to have flooded.
• Factory and school canteens where hundreds eat from one kitchen.
• Fresh and weekly markets in Mueang Saraburi, Nong Khae and district towns.

Priority 2: spaces where many people live together or pass through

• Worker dormitories and rental rooms around factories in Nong Khae, Wihan Daeng, Kaeng Khoi and Chaloem Phra Kiat.
• Temples, especially those drawing many worshippers, such as in Phra Phutthabat district, and village temples used as shelters or charity kitchens.
• District offices, municipalities, subdistrict administrations and health-promoting hospitals, where residents come for relief and services after the flood.

Priority 3: business and tourism spaces

• Resorts, guesthouses, cafes and restaurants in Muak Lek and Wang Muang, which depend on visitors driving up for the cool season.
• Dairy farms, milk collection centres and cooperatives in Muak Lek, where people and animals share space and hygiene affects product quality (for animal pens and milking equipment, follow livestock-authority and milk-buyer guidance first).
• Warehouses, building-supply stores and roadside shops that need to trade again quickly.

The many germs left behind as the Saraburi floods recede

Flood water in Saraburi passed through rice fields, villages, drains, septic tanks and industrial areas. When it drops, it leaves mud and many kinds of germs stuck to surfaces. WHO and CDC advise treating anything touched by flood water as contaminated, and cleaning and disinfecting it before use.

Bacteria from sewage and waste

E. coli and other faecal bacteria come from overflowing septic tanks, toilets and sewers. In factories and schools, ground-floor shared toilets are where drain water backs up most. The bacteria settle on floors, lower walls and under basins, causing diarrhoea, stomach cramps and nausea.

Salmonella is linked to food poisoning and is a top risk for high-volume canteens, resort kitchens and market food shops. It clings to chopping boards, trays, chillers and kitchen floors, and passes into food if not disinfected.

Leptospira (leptospirosis) lives in standing water and wet soil, especially in the rice areas of Nong Saeng, Nong Don, Don Phut and Sao Hai. Rats escaping the water move into warehouses, storerooms and roof spaces. Anyone who waded or shovelled mud and then develops high fever, headache and severe calf pain must see a doctor immediately and mention the flood exposure. Spraying lowers risk on indoor surfaces but does not replace treatment.

Viruses that spread fast in workplaces and schools

Norovirus and rotavirus cause diarrhoea and vomiting and spread hand to mouth via shared surfaces: toilet door handles, fingerprint time clocks, stair rails, water-dispenser buttons and canteen tables. In shift-based factories, they can pass from one shift to the next without anyone noticing.

Hand, foot and mouth disease is common in young children, so reopening childcare centres must take special care with toys, nap mats and floors.

RSV and influenza spread at the turn from rainy to cool season, when many people return to closed rooms at once. Bodies worn out from post-flood clean-up catch infections more easily, and young children and older adults face more severe illness.

Mold, spores and musty odour

Mold starts quickly after the water drops, especially on gypsum walls, ceilings, carpets, curtains, chair foam and office paperwork. WHO and CDC advise cleaning and drying within 24 to 48 hours to limit mold, which is hard to achieve across large factories and schools. Spores trigger allergies, sneezing, blocked noses, eye irritation, coughing and asthma attacks.

Musty odour signals remaining moisture or germs. In locker rooms, classrooms or resort rooms, it instantly undermines confidence. Spraying reduces odour-causing germs on surfaces, and for smells in the air of closed rooms the residential ozone disinfection service can be added as an extra step.

Who is most at risk

Young children, older adults, pregnant women, people with chronic illness or weak immunity, people with allergies or asthma, and night-shift workers short on rest after days of clean-up should be protected first.

What happens if Saraburi organisations reopen without disinfecting

Health: workers, students or temple visitors fall ill in clusters and carry germs home to their families.

Production and income: a factory that just stopped for the flood and then stops again because workers fall ill together takes a double hit. Muak Lek resorts and restaurants with reviews mentioning musty rooms or mold can lose a whole tourist season.

Time: if mold returns within weeks, spaces must close again for stripping, scrubbing and repainting.

Credibility: staff, parents and customers want to see that safety is taken seriously. A clear, documented disinfection step communicates that well.

Family: employees taking leave for sick children and parents missing work for clinic visits spread the cost across the whole community.

Why ordinary cleaning is not enough for Saraburi factories, schools and markets

Too big to wipe point by point: one factory canteen may have hundreds of tables and chairs and dozens of toilets. Wiping it all by hand takes too long and misses spots.

Pressure washing alone: moves mud but does not disinfect, and can spread germ-laden droplets higher up walls.

Unmeasured bleach: produces irritating fumes in closed rooms, puts cleaners at risk, and works poorly on surfaces still coated with mud.

Fans and waiting: large buildings with many closed rooms dry slowly, giving mold time to grow.

Painting over or fitting new ceilings straight away: if the structure behind is still damp, mold returns beneath the new material.

Air fresheners: mask the smell, not the cause.

What closes the gap is an evidence-backed disinfectant applied evenly across large areas.

How WHD disinfection spraying works in flooded areas of Saraburi

According to World Health Disinfection (WHD) service information, trained technicians spray and/or ULV-fog (Ultra Low Volume), turning the disinfectant into a very fine mist that floats and settles evenly across large spaces such as canteens, classrooms, locker rooms, shared toilets and market halls, including table legs, under chairs and hard-to-wipe corners.

The disinfectant is CHEMGENE HLD4H, a medical-grade disinfectant from the UK containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. According to the service information it covers viruses, bacteria and fungi; the service page lists organisms including COVID-19, RSV, H1N1, H5N1 and hand, foot and mouth virus, states 99.99% effectiveness, and lists approvals or endorsements from the Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019.

Why clean first, then spray

Disinfectant works best in direct contact with surfaces and germs. If mud or grease remains, it lands on the dirt and the germs underneath survive. The right order is: remove mud, wash with water and detergent, wipe or ventilate until dry, then spray. The ULV mist settles evenly on the cleaned surfaces, so the disinfectant can act on germs left after washing across large areas where point-by-point wiping falls short.

The service process

1. Book: call 065-556-6294 or LINE @whd268 with your district, type of space, size, number of buildings and photos.
2. Prepare: remove mud, clean, store food, dishes, documents and personal items, and move people, pets and plants out of the spray zone.
3. Technicians spray: wearing protective equipment, one zone at a time. Large buildings can be scheduled in phases so operations are not all disrupted at once.
4. Wait about 30 minutes: per the service information, and re-enter at the time the technicians give.
5. Return to normal use: ventilate and start using the space.

Service in Saraburi

WHD is based in Bang Khae, Bangkok, with no branch in Saraburi. Service in Nong Khae, Wihan Daeng, Kaeng Khoi, Muak Lek, Phra Phutthabat, Sao Hai or other districts is planned by phone or LINE, with dates and travel confirmed case by case; same-day arrival cannot be guaranteed. Contact the team when cleaning starts, so the spraying date lands after your space is ready and before work or classes resume.

Safety notes

Everyone should leave the zone during spraying and return at the time the technicians give. Spraying comes after mud removal and washing; it does not replace structural repairs, electrical checks, replacing damaged materials or medical care. Anyone who feels ill should see a doctor.

Promotion, per the service information: a free CHEMGENE spray bottle and WELLGIENIC wet tissues with the service, and a tax invoice on request, suited to factories, companies, schools and agencies that need paperwork.

10 reasons Saraburi factories, schools, markets and temples choose spraying after the water drops

1. Restart with more confidence, lowering the risk of workers falling ill together and halting production again.
2. Large areas covered quickly with ULV mist across canteens and halls.
3. Several germ groups in one round, bacteria, viruses and fungi, with a CHEMGENE HLD4H spraying service.
4. Childcare centres and schools ready for children, with clear messages for parents.
5. Markets and restaurants reopen with customer confidence.
6. Muak Lek resorts and shops cut the risk of musty smells and mold before the tourist season.
7. About 30 minutes of waiting, per the service information, with phased plans for large buildings.
8. Tax invoice available for purchasing departments and government agencies.
9. A disinfectant with EN 14476 and agency approvals listed on the service page, so you can check.
10. A team that serves hospitals, schools, malls, airports, offices and banks, per the customer list on the service page. See the WHD disinfection service page.

Before and after: what Saraburi organisations typically see

Note: results depend on removing mud, washing and drying first. Gypsum, ceilings, carpets or foam with deep mold may need replacing.

Example case: a community market and childcare centre by the Pa Sak in Sao Hai

(An illustrative example case, not a verified review.)

Khun Ann works for a local administration in Sao Hai district that runs both a community market and a childcare centre not far from the Pa Sak River. During the flood, the market yard and the centre's classrooms held water for several days. When it receded, villagers and vendors shovelled out mud while the caregivers carried out nap mats and toys to wash.

Khun Ann had to answer two questions: when would the childcare centre be ready, and when could the market reopen? Parents were asking in the LINE group whether the classrooms had been disinfected, and vendors wanted to trade again after days without income.

She contacted a spraying team and sent photos and floor sizes on LINE. The team advised finishing the cleaning at both sites, throwing out nap mats ruined by water and opening windows to dry, then confirmed a visit date. On the day, technicians sprayed the centre's classrooms, nap room, toilets and kitchen, then the market yard, stalls and public toilets. Everyone left each zone during spraying and returned at the time given.

The administration received a tax invoice for its reimbursement paperwork. Khun Ann informed parents with photos of the process, and the childcare centre reopened on schedule. Market vendors used the free CHEMGENE bottle to spray counters and trolley handles every morning in the first week.

Recovery checklist for Saraburi factories, schools, markets and temples

Before spraying

• Have an electrician check wiring, control panels and ground-floor sockets before switching on.
• Cleaners wear boots, rubber gloves and masks, and cover cuts before shovelling mud.
• Remove mud and ruined materials such as carpets, mattresses, cushions, swollen gypsum and cardboard.
• Wash floors, lower walls, tables, chairs and lockers with detergent, then ventilate until dry.
• Throw away all food and ingredients that touched flood water.
• Move documents, electronics and personal items out of the spray zone.
• Draw a simple floor plan and zone order so technicians can plan phased spraying.

On the day and afterwards

• Move people, pets and plants out of the spray zone.
• Wait for the time the technicians give (about 30 minutes per the service information), then ventilate.
• Rinse food containers with clean water before use.
• Tell staff, parents or customers the area has been cleaned and disinfected.
• Spray shared touch points such as fingerprint clocks, door handles and lift buttons with CHEMGENE regularly in the first week.
• Check closed rooms for new mold; if found, look for leaks or damp spots.
• Anyone with fever, diarrhoea or calf pain after wading should see a doctor at once.

FAQ: post-flood disinfection in Saraburi

Does WHD have a branch in Saraburi?

No. WHD is in Bang Khae, Bangkok. Service in Saraburi is planned by phone on 065-556-6294 or LINE @whd268, with dates and travel confirmed case by case; same-day arrival is not guaranteed.

Does a large factory have to shut down entirely during spraying?

Not necessarily. Spraying can be planned zone by zone, for example canteen, toilets and locker rooms, at times they are not in use, with everyone out of the zone being sprayed.

The water is gone but mud remains. Can we spray now?

No. Remove mud and wash first, because mud stops the disinfectant reaching germs on the surface.

How long do we wait after spraying?

About 30 minutes according to the service information; follow the re-entry time the technicians give.

Can we get a tax invoice in a company or agency name?

Yes. According to the service information, a tax invoice can be issued.

After spraying, do we still need to worry about leptospirosis?

Yes. Spraying lowers risk on indoor surfaces, but infection usually comes from wading in water or mud outside. Wear boots, cover wounds and see a doctor if you develop fever and calf pain.

Book post-flood disinfection in Saraburi before work, classes and markets restart

Share your district, type of space, size, number of buildings and photos, and the team will help plan the date and zone order.

See the disinfection service and book

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

Related links

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

References

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