The Flood in the Sam Phran Market Community, According to News Reports

According to Thai PBS on 29 September 2026, the Tha Chin River overflowed its banks and flooded homes in Sam Phran district. At gauging station T.14 the water stood roughly 46 centimetres above the bank. Pumps were installed in the Sam Phran market community, and residents moved their belongings up high.

The same report attributed the flood to continuous rain, water arriving from upstream, and high tide, with the tide peaking between 06.00 and 09.00. These figures reflect the date of the report. The level of the Tha Chin changes with rain, upstream flow and the tidal cycle every day, so readers should follow the latest announcements from the Royal Irrigation Department, Sam Phran district and the local municipality.

Nationally, data from the Department of Disaster Prevention and Mitigation, published by the Government Public Relations Department as of 06.00 on 7 October 2026, showed floods in 27 provinces plus Bangkok, covering 123 districts and 984 subdistricts, with 1,154,875 households and more than 3.1 million people affected.

What sets Sam Phran apart is the rhythm of the tide. In the morning, when the tide is high, water pushes into homes and shops. When it drops later in the day it leaves a thin film of silt and moisture behind, and the next morning it comes back. This wet and dry cycle builds up layers of mud, never lets walls dry fully, and keeps carrying sewage germs back inside. Cleaning and disinfection therefore need to wait until the water has receded for good.

Example Case: A Grocery Shophouse in Sam Phran Market and the Water That Came Every Morning

Note: this is a typical scenario compiled from situations that often occur in riverside shophouses during tidal flooding. It is not the account of any specific family.

Grandma Boonmee lives in a two-storey wooden shophouse in the old riverside market with her daughter and three-year-old grandson. The ground floor is a small grocery. In late September, water began seeping into the shop every morning at high tide. Her daughter woke before dawn to lift cases of drinking water, rice sacks and snacks onto high shelves, then waited for the water to recede before opening late in the morning.

After several days, a thin grey-brown layer of silt had built up along the walls. A drain-like, musty smell hung in the air, and dark spots appeared on the lower timber walls. Her grandson liked to play with his toy cars on the shop floor and had two days of loose stools; his mother took him to a doctor. Grandma had a scrape on her leg from wading that grew red and swollen, so she also went to have it checked.

Once the water had stayed down for several days in a row, the family did a big clean. They threw out cardboard boxes, doormats and wet stock and scrubbed the floor and walls with detergent. But the daughter still worried whether her son could safely play on the floor again, so she sent photos of the shop and the upstairs bedroom to the WHD team on LINE.

The team advised waiting until they were sure the tide would no longer come in, finishing the washing, then opening windows and running fans to dry the space before booking spraying for the whole ground floor, including the bathroom and stairs. Everyone would leave during spraying and come back at the time the technicians gave, and toys and shelves would be wiped as the technicians advised before use.

Flood Germs in Sam Phran, Nakhon Pathom: Tidal Water, Shophouses and Families With Young Children

Floodwater in the Sam Phran market community is Tha Chin river water mixed with rain and sewage from community drains. As the tide pushes it in and out each day, waste from septic tanks and drains is carried in and out of homes again and again. Below are the key germs to know. This is general prevention information, not treatment advice. Anyone who feels unwell should see a doctor.

1. E. coli (Escherichia coli) from septic tanks and drains

How the flood spreads it: many old riverside shophouses use small septic tanks. When the water rises above them, sewage is forced back up through toilets and floor drains and spreads across the ground floor.

Where it hides afterwards: bathroom floors, around toilets, drains outside the shop, roller-shutter tracks and floor grooves where silt collects.

Symptoms and who is at risk: diarrhoea and cramps, sometimes with blood. Toddlers who play on the floor and older adults are most at risk.

Prevention: wash hands with soap, keep children out of floodwater, wash floors with clean water and then disinfect. E. coli belongs to the bacteria group the product says it covers in general, but no organism-specific test is listed. Ask WHD for data if needed.

2. Leptospira: the cause of leptospirosis

How the flood spreads it: old markets and riverside shophouses have plenty of rats. As the water rises each morning, they climb onto shelves, into ceilings and upstairs, and their urine mixes into water and mud.

Where it hides afterwards: wet silt in shop corners, behind shelving, under stairs, in drains and storerooms.

Symptoms and who is at risk: the bacteria enter through wounds or soaked skin. Illness often starts with sudden high fever, headache, calf pain and red eyes. Anyone wading daily to move stock is most exposed. A fever after wading means seeing a doctor promptly and mentioning it.

Prevention: rubber boots, waterproof dressings, rat traps and lidded food containers. It is a bacterium, and no specific test is listed.

3. Shigella: the cause of bacillary dysentery

How the flood spreads it: it spreads from infected stool via hands, food and water, and only a few bacteria are needed. Risk rises when tap water is unreliable and families share toilets.

Where it hides afterwards: door handles, taps, water scoops, dining tables and children's toys.

Symptoms and who is at risk: frequent stools with mucus or blood, straining and fever. Young children are most at risk.

Prevention: wash hands with soap before eating and after the toilet, and disinfect shared touch points. It falls within the bacteria group covered in general, with no specific test listed.

4. Norovirus

How the flood spreads it: highly contagious via food, water, hands and surfaces soiled by vomit or stool. Food stalls and restaurants reopening after the flood need extra care.

Where it hides afterwards: counters, stair rails, door handles, toilets and food containers.

Symptoms and who is at risk: sudden vomiting, diarrhoea and cramps; children and older adults risk dehydration.

Prevention: wash hands with soap and water, clean up vomit promptly and then disinfect. According to WHD's product information, norovirus is one of the organisms CHEMGENE HLD4H is stated to cover.

5. Hepatitis A virus

How the flood spreads it: it spreads through food and water contaminated with faeces. Riverside eateries rinsing vegetables and dishes in unsafe water after a flood can become a risk point.

Where it hides afterwards: fresh vegetables, ice, dishes and the hands of cooks.

Symptoms and who is at risk: tiredness, poor appetite, nausea, and yellow skin and eyes.

Prevention: drink safe water, eat freshly cooked food and ask a doctor about vaccination. It falls within the virus group covered in general, with no specific listed test.

6. Enterovirus: the cause of hand, foot and mouth disease

How the flood spreads it: it spreads through saliva, mucus, blister fluid and stool. When children are squeezed upstairs because the ground floor is flooded, or stay with children from other families, it spreads more easily.

Where it hides afterwards: toys, spoons, cups, children's bedding and play areas.

Symptoms and who is at risk: fever, mouth sores and spots on hands and feet. Young children are most at risk; see a doctor if a child is drowsy, vomits often or shows unusual neurological signs.

Prevention: handwashing, separate utensils, and cleaning and disinfecting toys. According to WHD's service information, hand-foot-mouth virus is on the list of organisms the service is stated to cover.

7. Respiratory Syncytial Virus (RSV)

How the flood spreads it: floods are not a direct source of RSV, but the end of the rainy season is a common time for RSV in children. Damp homes, cooler air and crowding help it spread through droplets and shared surfaces.

Where it hides afterwards: toys, cot rails, door handles and mobile phones.

Symptoms and who is at risk: fever, cough, runny nose and wheezing. Babies and toddlers may struggle to breathe, and older adults are also at risk. See a doctor for fast or laboured breathing.

Prevention: handwashing, keeping sick children apart and cleaning shared touch points. According to WHD's service information, RSV is on the list of organisms the service is stated to cover.

8. Staphylococcus aureus and infected wounds

How the flood spreads it: this bacterium lives on many people's skin. Scrapes from daily wading or cuts from debris that soak repeatedly in dirty water become infected easily.

Where it hides afterwards: shared towels, rags, wet shoes and surfaces that touch wounds.

Symptoms and who is at risk: swelling, redness, heat, pain and pus, sometimes fever. Older adults and people with diabetes heal more slowly.

Prevention: rinse wounds with clean water, cover them, see a doctor if they become inflamed, and ask about tetanus vaccination for dirty wounds. It is a bacterium with no specific listed test.

9. Dermatophytes: the fungi behind "water-bitten feet"

How the flood spreads it: wading every morning at high tide keeps feet wet over and over, softening skin so fungi and bacteria can invade.

Where it hides afterwards: sandals, boots that never dry, doormats and bathroom floors.

Symptoms and who is at risk: itching, peeling and soggy skin between the toes. People with diabetes must watch for spreading wounds.

Prevention: wash and dry feet every time, change into dry footwear, and see a doctor if it does not improve. Fungi are a group the product says it covers, without a test listed for this type.

10. Moulds in shophouses that keep getting wet (Aspergillus, Penicillium, Stachybotrys)

How the flood spreads it: daily tidal flooding means walls and timber never dry. After more than 24 to 48 hours of dampness, mould starts to grow and can spread above the water line.

Where it hides afterwards: lower walls, timber stairs, cardboard, rice sacks, ground-floor ceilings and behind built-in cupboards.

Symptoms and who is at risk: blocked nose, coughing, sneezing and sore eyes; asthma and allergies can flare.

Prevention: discard mouldy porous materials, dry thoroughly once the water stays down, then disinfect. According to the product information, fungi and mould are a group CHEMGENE HLD4H is stated to cover, without genus-level tests listed.

The common thread in Sam Phran: because the tide may return, disinfection should happen only once the water has receded for good and the mud has been cleaned away. Spraying while the water is still rising and falling simply lets the next tide carry germs back in. The right order is: wait for the water to go, remove mud, wash, dry, then spray, in line with CDC and WHO guidance for flood-affected areas.

What Sam Phran Families and Shops Risk If They Skip Disinfection

Children and older adults: old market shophouses often house several generations, from toddlers who play on the floor to grandparents with weaker immunity. If sewage germs remain on the ground floor, these two groups feel it first: diarrhoea, rashes, infected wounds and respiratory illness.

Income: shops in the Sam Phran market community closed or opened short hours throughout the high-tide period. Customers return only when a shop feels clean, smells fresh and shows no sign of rats.

Time, effort and property: washing the house every day through the tidal cycle is exhausting, and timber and walls that get wet and dry repeatedly rot and grow mould faster. One thorough clean and systematic disinfection after the water has gone cuts down repeated work and slows the damage.

Why Washing a Tha Chin Riverside Shophouse Every Day Is Not Enough

During the high-tide period many families wash their floors daily once the water drops, but each tide's thin film of silt works deeper into floor grooves and walls. Water or floor cleaner removes surface dirt but does not destroy germs lodged in porous concrete and timber.

Home-mixed bleach needs the right ratio, must never be mixed with toilet cleaners or ammonia because dangerous gases form, loses strength in mud and can damage stock or fabric. In a poorly ventilated shophouse it can also irritate the airways, especially for small children.

Commonly missed spots include roller-shutter tracks, under shelving, under timber stairs, the joint between wall and floor, bathroom drains and behind the fridge. Trained technicians spraying or fogging disinfectant reach these more evenly with the right contact time, but only after the water has gone for good, the mud is out and the space is washed.

How the WHD Post-Flood Spraying Service Works for Homes and Shops in Sam Phran

According to World Health Disinfection's service information, trained technicians spray and/or ULV-fog (Ultra Low Volume fine mist) using CHEMGENE HLD4H, a medical-grade disinfectant from the United Kingdom 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, with a stated efficacy of 99.99%, and lists approvals or endorsements from the Thai Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019.

1. Survey and assessment: send photos, the shophouse size, number of floors and flood height to 065-556-6294 or LINE @whd268. WHD is based in Bang Khae, Bangkok 10160 and has no branch in Nakhon Pathom; visits outside Bangkok are arranged in advance case by case.
2. Wait for the water, then wash: wait until the tide no longer enters, remove mud, discard damaged materials, wash floors, walls and shelves with clean water and detergent, and let air flow.
3. Preparation and zoning: remove food, stock, toys and personal items, and divide the property into zones such as shopfront, bathroom, kitchen, stairs and bedrooms.
4. Spraying: everyone, including children and pets, leaves the zone being sprayed. Technicians treat floors, lower walls, under shelves, shutter tracks and shared touch points.
5. Waiting and re-entry: the service information says to wait about 30 minutes before normal use. Follow the time the technicians give on the day, and ask whether food-contact surfaces and toys should be wiped before use.

According to the service information, customers receive a free CHEMGENE spray bottle and WELLGIENIC wet tissues, and a tax invoice is available. Pricing depends on size and condition, so please ask the team directly.

10 Reasons Tha Chin Riverside Homes in Sam Phran Should Disinfect After the Water Recedes

1. Daily tides carry germs from septic tanks and drains into homes again and again.
2. Layers of thin silt hide germs in floor grooves and walls.
3. Rats escaping the water in the old market leave urine on shelves, raising the risk of leptospirosis after floods.
4. Homes with toddlers who play on the floor need surfaces that have been disinfected.
5. ULV mist reaches shutter tracks, under shelves and under stairs more evenly than wiping.
6. CHEMGENE HLD4H is a medical-grade disinfectant used in hospitals and schools, according to the service information.
7. Trained technicians use suitable quantities and contact times, with no home-mixing risk.
8. It helps reduce musty odours from mould and bacteria caused by repeated wetting.
9. Shops can tell customers they have been washed and given post-flood disinfection spraying.
10. Tax invoices are available, and the team is easy to reach on LINE @whd268.

Before and After Spraying: A Sam Phran Market Shophouse

Recovery Checklist for Sam Phran, Nakhon Pathom

Before spraying

• Follow water level and high-tide announcements, and wait until the water stays down.
• Switch off ground-floor power and have an electrician check before use.
• Wear rubber boots, gloves and a mask while shovelling mud.
• Discard soaked food, medicines, cardboard, rugs and soft toys.
• Wash floors, walls, shelves and shutter tracks with clean water and detergent.
• Open doors and windows and use fans to dry.
• Check the septic tank and drains, and call a plumber if blocked.

After spraying

• Wait for the technicians' re-entry time, then ventilate.
• Wipe toys and food-contact surfaces as advised.
• Set rat traps and use lidded bins.
• If water returns, clean again and consult the team.
• Watch children and older adults; see a doctor for fever, calf pain, diarrhoea, laboured breathing or inflamed wounds.

FAQ: Post-Flood Disinfection in Sam Phran

Q: The tide still comes in every morning. Should we spray now?
A: Not yet. The next tide will bring mud and germs back. Wait until the water no longer enters, then wash and dry first. Meanwhile, wash hands often, wear boots and keep children out of the water.

Q: We have a toddler. Is it safe?
A: Children must be out during spraying and return at the time the technicians give. For toys and crawling areas, ask whether to wipe with clean water before use, and do not assume there is no residue.

Q: Does WHD serve Nakhon Pathom?
A: WHD is based in Bang Khae, Bangkok and has no Nakhon Pathom branch, but takes jobs outside Bangkok by advance appointment via phone or LINE, confirming dates after assessment.

Q: Does it cover hand, foot and mouth disease and RSV?
A: According to the service information, hand-foot-mouth virus and RSV are on the list of covered organisms. Others, such as E. coli or Leptospira, fall within the bacteria group in general without specific tests; ask the team for data.

Q: How much does it cost?
A: It depends on area, floors and condition. Send details to LINE @whd268 or call 065-556-6294.

Make Your Sam Phran Shophouse a Healthy Home Again

Wait for the water to go, remove the mud, wash thoroughly, then let the WHD team spray before the children play on the floor again.

See the Disinfection Spraying Service

Call 065-556-6294 | LINE @whd268

Related Links and References

• World Health Disinfection spraying service
• CHEMGENE HLD4H disinfectant
• Residential ozone disinfection for musty odours
• Thai PBS, Tha Chin River overflows into the Sam Phran market community (29 September 2026): thaipbs.or.th
• Government Public Relations Department, DDPM flood update (7 October 2026): prd.go.th
• CDC floods and cleanup: https://www.cdc.gov/floods/
• World Health Organization fact sheets: https://www.who.int/news-room/fact-sheets
• Thai Department of Disease Control: https://ddc.moph.go.th/