Quick summary: According to DDPM data as of 06:00 on 7 October 2026, Nakhon Nayok had four affected districts (Pak Phli, Mueang Nakhon Nayok, Ban Na and Ongkharak), covering 44 sub-districts, 482 villages and 53,928 households, with the water level reported as stable. These figures change daily, so always check the latest official updates. Disinfection spraying is a step after cleaning. It does not replace mud removal, drying or medical care.

A Typical Scenario: A Nursery Owner's Home in Ongkharak After Days Under Water

This is an illustrative example case built from situations that are common after floods. It is not an interview with a real person.

Somsri has grown and sold ornamental plants in Ongkharak for almost twenty years. Her two-storey wooden house sits right next to rows of variegated foliage plants and more than a thousand pots. This year the water arrived faster than she expected. Days of heavy rain, water running down from upstream and a swollen Nakhon Nayok River combined, and within a few days the whole nursery was under brown water. The ground floor, where she packs plants for customers and keeps the kitchen, flooded too.

While the water was high, Somsri and her husband moved upstairs. Every morning they waded out to check the plants and waded back to fetch essentials from downstairs. She noticed the water smelled worse every day. Rotting leaves, mud and rubbish collected against the front door. Next door there was a small chicken coop, and several neighbours' septic tanks sat at the same level, all under water.

When the water dropped to ankle height, the couple started shovelling mud out of the ground floor and washing it with clean water and the floor cleaner they had at hand. Two days later the musty smell was still there. Dark spots began to appear along the old waterline on the lower walls. The wooden kitchen cabinets had swollen and smelled damp. Their four-year-old grandson, who was staying with them, developed a rash on his arms and legs, and her husband had diarrhoea after eating in the freshly washed kitchen. Their first move was the right one: they went to see a doctor at the nearby hospital.

After getting medical advice, Somsri called WHD to ask what a washed house still needed. The team explained that cleaning is the essential step and always comes first, while disinfection spraying is an additional step that helps reduce germs on surfaces that have already been washed, especially kitchens, bathrooms, packing areas and places where small children spend time. The team asked for photos of each room over LINE, estimated the floor area, and then planned a trip from Bangkok on an agreed date.

Somsri's story mirrors what many households in Nakhon Nayok are facing. Water that stays for days leaves more than mud. It brings germs from soil, animal waste, sewage and rotting plants together inside the home. Knowing what these germs are and where they hide makes recovery safer.

Nakhon Nayok Flood 2026: The Latest from DDPM and News Reports

Everything in this section comes from sources with clear dates. Read it as a snapshot on those dates, because the flood situation changes every day.

• DDPM data as of 06:00 on 7 October 2026 (published by the Government Public Relations Department): Nakhon Nayok had four affected districts, namely Pak Phli, Mueang Nakhon Nayok, Ban Na and Ongkharak, with 44 sub-districts, 482 villages and 53,928 affected households.
• Water level status: DDPM reports on 6 and 7 October 2026 listed Nakhon Nayok as "stable". In other words, the water had not clearly started to fall, and many areas still had to live with it for a while longer.
• Ornamental plant nurseries in Ongkharak (Thai PBS, 4 October 2026): more than 20,000 rai of nurseries were damaged in Khlong Yai, Bang Pla Kot and Pho Thaen sub-districts, affecting about 2,000 growers. Plants had been under water for about six days. The water came from Nong Khae district in Saraburi, combined with the Nakhon Nayok River and local rain.
• Highway 305 (MGR Online, 11:37 on 6 October 2026): the Rangsit to Nakhon Nayok road still had two flooded points, in front of Srinakharinwirot University Ongkharak (km 41) and at the Sam Yaek Fai Daeng junction (km 44), with water of about 30 cm.

Put together, these reports show that this was not a flash flood that came and went. Water sat in homes, farms and main roads for days. The longer water stands, the more moisture building materials absorb, and the better the conditions for mold and bacteria. That is why homes in Nakhon Nayok need a step-by-step recovery plan rather than a quick mop and an immediate move back in.

Ongkharak has residential communities, farms and a large university campus side by side, so post-flood risks take many forms. Homes need to focus on kitchens and bathrooms. Nurseries need to deal with greenhouses and packing sheds. Roadside shops need to get their premises ready for customers again. Each needs a slightly different plan, as the sections below explain.

The National Picture, According to DDPM on 7 October 2026

Nakhon Nayok is part of a much bigger event. DDPM data as of 06:00 on 7 October 2026, published by the Government Public Relations Department and Thai PBS, showed flooding in 27 provinces plus Bangkok, covering 123 districts, 984 sub-districts and 7,215 villages, with 1,154,875 households and more than 3.1 million people (3,160,972) affected. DDPM attributed the floods to heavy to very heavy rain in many areas, combined with water flowing down from the North.

For comparison, Thai PBS reported on 4 October 2026 that 154 districts, 1,209 sub-districts and 1,171,165 households were affected, and Krungthep Turakij reported DDPM data for 06:00 on 6 October 2026 showing 126 districts, 999 sub-districts and 1,149,285 households. The number of districts and sub-districts has fallen, but the household total has stayed at a similar level because water is still rising in some provinces.

According to the DDPM report of 7 October, provinces where water was still rising were Sing Buri, Suphan Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Samut Prakan, Pathum Thani, Ratchaburi, Samut Songkhram, Prachin Buri and Chachoengsao. Nakhon Nayok was listed as stable. Thai PBS noted that DDPM continues to monitor the situation 24 hours a day. For families in Nakhon Nayok, this means that even though water in the province is not rising, neighbouring eastern provinces such as Prachin Buri and Chachoengsao still are, so it makes sense to allow extra time for recovery and to keep following the news.

Post-Flood Disinfection Spraying in Nong Chok, Bangkok: The Latest Situation

On Bangkok's eastern edge, Nong Chok has a lot in common with Nakhon Nayok: long-established communities, farmland, many canals, and local markets at the centre of daily life. This year it was among the hardest-hit districts. Here is what the sources confirm:

• 26 September 2026: the Bangkok governor declared eight sub-districts of Nong Chok (Krathum Rai, Nong Chok, Khlong Sip, Khlong Sip Song, Khok Faet, Khu Fang Nuea, Lam Phak Chi and Lam Toiting) disaster areas, because water in Khlong 13 coming from Pathum Thani was high and the floodgates were fully opened to drain water towards Lat Krabang (TopNews).
• Daily life: reports from the same period described quiet markets and many shops closed.
• 18:52 on 29 September 2026: DDPM sent a Cell Broadcast alert to three districts, Sai Mai, Khlong Sam Wa and Nong Chok, about water overtopping the flood embankment along the lower Hok Wa canal next to Pathum Thani, telling residents to move belongings to higher ground (Naewna).
• 29 September to 5 October 2026: Nong Chok remained at risk of the lower Hok Wa canal overflowing (Siam Rath).
• 6 October 2026: Nong Chok was still among the areas where drainage had to be sped up continuously (MGR Online).
• High-impact district: according to BMA information published on 29 to 30 September 2026, Nong Chok was one of 15 high-impact districts, together covering 748 communities. Rocket Media Lab, published by Prachatai on 7 October 2026, found that Nong Chok moved from moderate impact in 2011 to high impact in 2026.

Flooding here means canal water that lingers in waterside communities. Raised wooden houses face damp, rubbish-filled spaces underneath; single-storey homes see water reach bedrooms and kitchens directly; market stalls need special care for food counters and shelves that the whole community touches every day.

WHD can spray in Nong Chok using the same steps as in Nakhon Nayok: survey, advice on mud removal and washing, zoning, spraying, and a re-entry time. Market traders can schedule the work for closing hours. WHD has no branch in Nong Chok or Nakhon Nayok; bookings are made by phone and LINE and depend on the day's queue. Families with homes in both places can tell the team at the same time so the visits can be planned together.

What Germs Does the Nakhon Nayok Flood Leave in Homes and Farms?

Floodwater that runs through fields, nurseries, villages and roads carries mud, animal waste, sewage from submerged pipes and septic tanks, rotting plants and rubbish. When it recedes, part of that load stays behind in mud films, tile grout, door frames and anything absorbent.

Sewage bacteria. Gut bacteria from people and animals, such as E. coli and Salmonella, can end up on kitchen floors, tables, sinks and dishes. Contaminated hands or food can cause diarrhoea, stomach cramps, nausea and vomiting. Young children and older adults lose fluids faster than others.

Leptospirosis risk. In farming areas such as Ongkharak and Ban Na, rats escape the water into houses, sheds and greenhouses. Leptospira bacteria from animal urine can survive in standing water and wet soil. The Department of Disease Control advises wearing boots when wading or shovelling mud. If you develop a high fever, headache or muscle pain, especially in the calves, after wading or cleaning, see a doctor promptly and mention the flood exposure. Spraying does not replace personal protection or treatment.

Viruses spread by hands and surfaces. After a flood, families crowd back into limited space, sometimes after time in shelters. Norovirus, hand, foot and mouth disease viruses in young children, and respiratory viruses such as RSV spread more easily. Door handles, stair rails, dining tables and toys deserve regular cleaning and disinfection.

Mold and musty odours. WHO and the US CDC advise cleaning and drying a flooded home quickly, generally within 24 to 48 hours, to limit mold. Where water stays stable for days, that is often impossible, so plaster, plywood, mattresses and cardboard become mold sources. Spores can trigger allergies, asthma and eye irritation.

Soil and farm germs. Small cuts from moving pots or shovelling mud should be washed and covered. If a wound becomes red, swollen or infected, see a doctor. This article gives general prevention information, not treatment advice.

Why Washing Alone Is Not Enough, and Common Mistakes

Skipping germ control after a flood can mean repeated illness, mold spreading into walls and cabinets (and much bigger repair bills), lost work days, and customers who lose confidence in a shop that still smells damp. Common mistakes include:

• Using undiluted bleach or mixing chemicals, which can release harmful fumes and damage surfaces. Read labels and never mix products.
• Washing only the floor and forgetting walls up to the waterline, table legs, door frames and the spaces behind fridges and under cabinets.
• Trusting a fan: surfaces dry, but plaster and wood stay damp inside.
• Covering smells with air freshener instead of removing moisture and microbes.
• Painting over mold, which soon bubbles back through.
• Working without gloves, boots and a mask.

Spraying by trained technicians follows washing to reduce germs evenly on cleaned surfaces, including hard-to-reach corners, using a product designed for disinfection.

How WHD's Post-Flood Disinfection Spraying Service in Nakhon Nayok Works

According to WHD's service information, trained technicians spray and/or fog with ULV (Ultra Low Volume) fine mist. 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 and mouth virus, claims 99.99% efficacy, and lists endorsements from the Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019.

For organisms not on that list, such as Leptospira or E. coli, WHD does not claim a specific test result. They belong to the bacteria group the product says it covers, and WHO and CDC advise cleaning and then disinfecting flood-contaminated surfaces. Ask the team if you need test data for a particular organism.

1. Survey: send photos and floor areas over LINE, or book a site visit.
2. Mud removal and washing first: remove mud, discard ruined items and wash surfaces. The team advises on anything that needs more cleaning.
3. Zoning: kitchen, bathroom, bedrooms, packing shed or shopfront.
4. Preparation: people, pets and food leave each zone before spraying.
5. Spraying: zone by zone, focusing on high-touch points and places where water stood longest.
6. Re-entry: the service page says to wait about 30 minutes before normal use; always follow the time the technicians give on site.

WHD is based in Bang Khae district, Bangkok 10160. Jobs in Nakhon Nayok are arranged by phone on 065-556-6294 or LINE @whd268. There is no local branch and no same-day guarantee, and pricing is quoted after the survey. Per the service page, customers receive a free CHEMGENE spray bottle and WELLGIENIC wet wipes, and a tax invoice is available. For lingering odours, residential ozone disinfection is a complementary service, done only in an empty, closed space.

10 Reasons Nakhon Nayok Homes and Businesses Should Disinfect After the Water Recedes

1. Water stood for days; nurseries in Ongkharak were under water for about six days, per Thai PBS.
2. DDPM listed the water as stable on 6 and 7 October, so drying is slower and mold has more time.
3. Floodwater mixed with sewage from submerged septic tanks and drains.
4. Farming areas mean more rats and animal waste on surfaces.
5. Children and older adults need systematically disinfected surfaces.
6. Trained technicians know which spots get missed and work zone by zone.
7. ULV mist reaches under cabinets and behind appliances.
8. CHEMGENE HLD4H is a medical-grade disinfectant; the service page lists hospitals, schools, malls, airports, offices, airlines, banks and residential buildings as customers.
9. Quick return to use, about 30 minutes per the service page, following the technicians' instructions.
10. Easy booking through the disinfection service page, phone or LINE, with a tax invoice for businesses.

Before and After Disinfection Spraying

Example Case: A Noodle Shop in Mueang Nakhon Nayok

An illustrative example case, not a real business.

Wit runs a single-storey noodle shop that had knee-high water for several days. Once it receded, he and his staff shovelled out the mud, scrubbed the steel tables and threw away all food that had touched the water. He still worried about the fridge, the bowl racks and the floor behind the counter. After he sent photos over LINE, WHD advised flushing the kitchen drain and removing the swollen plywood under the counter first, then sprayed the kitchen, shopfront and toilet while the shop was closed. Wit washed all food containers again before reopening. He did not get a promise that the shop would stay germ-free forever, but he did get a clear, documented process he could explain to regular customers.

Recovery Checklist for Nakhon Nayok and Nong Chok

• Have the electrics checked before going in if you are unsure.
• Wear rubber gloves, boots and a mask while removing mud.
• Throw away food, medicines and cosmetics that touched floodwater.
• Wash floors, walls and furniture; ventilate and dry.
• Photograph each room for the survey and for damage records.
• On spraying day, move people, pets, potted plants and food out of each zone.
• Afterwards, re-enter at the stated time and rewash food containers.
• Watch walls and wooden furniture for new mold.
• See a doctor for fever, diarrhoea, rashes or calf pain after wading.

FAQ: Post-Flood Disinfection Spraying in Nakhon Nayok

Does WHD serve Nakhon Nayok? Yes, by appointment via 065-556-6294 or LINE @whd268. The team travels from Bangkok; dates depend on the queue and road conditions.

The water has not fully gone. Should I book now? Wait until water is out and the house is washed, but you can plan and reserve a slot in advance.

Can spraying replace washing? No. Mud and dirt reduce disinfectant performance, so washing always comes first.

How long do we stay out? About 30 minutes per the service page; follow the technicians' on-site instructions.

Does it kill Leptospira? The service page does not list a specific test for it. Ask the team for test data, and anyone with symptoms should see a doctor.

Can you treat greenhouses or packing sheds? Ask the team; they will assess which areas suit spraying and advise on moving plants out.

Do you also cover Nong Chok? Yes. Mention both addresses when you book.

Finished Washing? Let WHD Handle the Disinfection

Book a survey and spraying plan for homes, nurseries and shops in Nakhon Nayok or Nong Chok, Bangkok.

See WHD Disinfection Service

Call 065-556-6294  |  LINE @whd268

Related Services and References

• WHD Disinfection Spraying Service
• CHEMGENE HLD4H disinfectant
• Residential ozone disinfection

• PRD, DDPM data 7 Oct 2026: https://www.prd.go.th/th/content/category/detail/id/33/iid/548715
• Thai PBS 7 Oct 2026: https://www.thaipbs.or.th/news/content/559271
• Thai PBS 4 Oct 2026: https://www.thaipbs.or.th/news/content/559135
• Thai PBS, Ongkharak nurseries: https://www.thaipbs.or.th/news/content/559141
• MGR Online, Highway 305, 6 Oct 2026: https://mgronline.com/business/detail/9690000097083
• Krungthep Turakij, 6 Oct 2026: https://www.bangkokbiznews.com/news/news-update/1255230
• TopNews: https://www.topnews.co.th/news/1702433
• Naewna, 29 Sep 2026: https://www.naewna.com/n/bkk/87836/
• Siam Rath: https://siamrath.co.th/health/326405
• MGR Online, 6 Oct 2026: https://mgronline.com/politics/detail/9690000097161
• Prachatai / Rocket Media Lab, 7 Oct 2026: https://prachatai.com/journal/2026/10/119021
• CDC Floods: https://www.cdc.gov/floods/ ; WHO: https://www.who.int/news-room/fact-sheets ; DDC: https://ddc.moph.go.th/