The Mae Klong River flows out of Kanchanaburi into Ratchaburi, past old riverside communities, waterside markets, fruit orchards and countless small canals, before reaching the sea at Samut Songkhram. When the river overflowed its banks at the end of September 2026, people in Ratchaburi, downstream, had to watch closely, because the water from upriver was on its way.

This article tells the real case of the Ratchaburi flood in 2026 as reported by the news and by the Department of Disaster Prevention and Mitigation (DDPM), without adding numbers or details that were not reported. It then looks at the germ risks in riverside homes, markets and food shops, which are the heart of the local economy, and explains a practical clean-then-disinfect routine using the medical-grade disinfectant CHEMGENE HLD4H once the water goes down.

Note: water conditions and household figures change daily. Keep following the latest announcements from Ratchaburi province and the DDPM.

What Happened in Ratchaburi Along the Mae Klong

According to Khaosod English on 29 September 2026, in a report that more than 2.6 million people had been affected by floods across Thailand, the Mae Klong River had overflowed its banks, and warnings were issued for areas of Ratchaburi province: Ban Pong, Photharam, Mueang Ratchaburi, Bang Phae, Damnoen Saduak, Wat Phleng and Pak Tho.

Then, according to a DDPM report dated 2 October 2026, Ratchaburi had 7 affected districts with 3,663 households, and water levels were still rising on that day. The figures show that the warnings at the end of September had become a real impact on thousands of households within a few days.

For the wider picture, the DDPM reported on the same date that floods were affecting 31 provinces plus Bangkok, with 1,245,581 households and 3,535,206 people affected, caused by heavy to very heavy rain plus runoff from the north. Kanchanaburi, upstream on the Mae Klong, was also affected at the same time.

What makes the Ratchaburi case distinctive is the province's position on the river. It sits midway along the Mae Klong, between the upper river in Kanchanaburi and the river mouth in Samut Songkhram. Riverside communities in Ban Pong and Photharam therefore tend to feel it when water comes down from upstream. Damnoen Saduak is an area where life is especially tied to canals: canal-side homes, orchards, and the floating market well known to visitors.

A note on reading the data: the list of warned districts comes from the 29 September report, while the 7 districts and 3,663 households come from the DDPM report of 2 October. We do not state how many households each district had or how deep the water was, because those details are not in the cited reports, and we will not guess them.

Example Case: A Noodle Shop by the Photharam Riverside Market

(An illustrative scenario based on common situations, not a real person or shop from the news reports.)

"Auntie Chan" has sold Thai rice noodles with curry from an old wooden shophouse near a Mae Klong riverside market for more than twenty years. When she heard the warnings that the river was overflowing, she and her son lifted the pots, ice buckets and sacks of flour onto high shelves. The wooden food cabinet, the shelving and the tables and chairs had to stay where they were. A few days later the water crept across the shop floor, and it stayed there for days.

When it receded, the shop was coated in a thin layer of silt mixed with leaves, the wooden walls had a clear tide line, and the air smelled of mud and mustiness. Regulars rang to ask when she would reopen. Auntie Chan wanted to open as soon as possible, having had no income for days, but she worried that if customers got an upset stomach, a reputation built over twenty years could be lost in a day.

Her worry is the same question asked by vendors, coffee shops, noodle stalls and fresh-food sellers across the riverside districts: "How do I reopen quickly, but safely?" The answer is to work in order, mud removal, cleaning, disinfection and drying, without skipping a single step.

Germs That Come with Flooding in Mae Klong and Damnoen Saduak Communities

River and canal communities have particular features: many homes drain waste water directly into the waterway, latrines sit close to the water table, and farms and animal pens are never far away. When the river overflows, all of this mixes together. The World Health Organization (WHO) and the US Centers for Disease Control and Prevention (CDC) advise treating floodwater as always contaminated with sewage, and Thailand's Department of Disease Control repeats its flood-disease warnings every year.

The risk for food businesses: E. coli and Salmonella

For markets and restaurants, sewage bacteria such as E. coli and Salmonella are enemy number one. They cling to counters, chopping boards, food cabinets, dishes and any floor the water reached. If cleaning is patchy or disinfection is skipped, they can contaminate food and give customers diarrhoea, vomiting, stomach cramps and fever. Any ingredients or food touched by floodwater should be thrown away, even in packaging that looks sealed, unless that packaging is genuinely waterproof.

Leptospirosis around orchards and markets

Markets feed rats, and the orchards and rice fields around communities are home to field rats. Floods drive them to higher ground, sometimes into shops and houses. Leptospira bacteria from rat urine survive in standing water and mud and enter the body through cuts or skin softened by soaking. Orchard owners returning to rescue their trees and vendors wading in to recover stock should always wear boots and gloves. Sudden high fever, headache or calf pain after wading means seeing a doctor promptly and mentioning the exposure.

Viruses where people gather

Markets and restaurants bring many people together. Rails, payment counters, trays and tables are touched hundreds of times a day. Diarrhoea viruses such as norovirus and rotavirus spread easily via surfaces and food; hand-foot-and-mouth disease virus spreads among young children who come with their parents; and respiratory viruses such as RSV and influenza thrive in the damp air of the rainy season. Regular disinfection of shared touch points matters a great deal when markets reopen.

Mould in wooden shophouses and storerooms

Old wooden shophouses, timber cabinets and riverside storerooms are places mould loves. When wood absorbs water and air does not circulate, mould appears within days. The CDC advises cleaning and drying within 24-48 hours after the water recedes, but where water levels were still rising, as the DDPM reported on 2 October, the water may stand much longer than that. Mould damages stock and furniture, and it can trigger allergies and asthma in people who work in the shop every day.

Who is most at risk in Ratchaburi

• Vendors and restaurant staff who must clean up and reopen fast.
• Orchard owners and farmers who wade into waterlogged land to save crops.
• Older adults in canal-side homes, often in old wooden houses and finding it hard to reach hospital during floods.
• Young children who play in water and mud and put their hands in their mouths.
• Pregnant women and people with chronic illness, such as diabetes, kidney disease or low immunity.

The Price of Reopening Too Soon Without Disinfecting

Risk to customers. A food shop that reopens after only a surface wash can make customers ill. The result is not just guilt but lost trust, and in a small community where everyone knows everyone, word about unclean food travels fast.

Damage to stock and equipment. Fridges, freezers, stainless shelving and expensive kitchen equipment can deteriorate faster if cleaned with corrosive chemicals, forcing replacement purchases while income has not yet returned.

A second closure. If staff fall ill from germs that were never removed, or mould spreads until a timber cabinet has to be ripped out, the shop closes again, costing far more than spending one extra day cleaning and disinfecting properly from the start.

The effect on tourism. In places like Damnoen Saduak that visitors know well, the cleanliness of shops and food boats is the image of the whole community. A careful, standards-based recovery helps tourists return sooner.

Why Washing-Up Liquid, Detergent or Chlorine Alone Is Not Enough

Washing away the mud with clean water and detergent must always come first, because it removes the soil, grease and grime that shelter germs. But detergent and washing-up liquid are designed to clean, not to disinfect surfaces systematically. Germs hiding in wood grain, counter joints and the pores of concrete floors can remain.

Many shops follow up with chlorine or bleach, which has its uses if mixed correctly, but it has drawbacks food businesses should weigh carefully:

• A lingering smell. A restaurant reeking of chlorine makes customers uncomfortable, and the smell can cling to dishes and hand towels.
• Corrosion of stainless steel and metal. Freezers, shelving, sinks and pots are a shop's core assets; repeated strong chlorine can leave rust spots.
• Danger if mixed wrongly. Never mix chlorine with acidic toilet cleaners or ammonia, as toxic gas can form.
• No lasting protection. Once chlorine evaporates, surfaces can be recontaminated at once by customers and incoming goods.

That is why riverside shops and homes should consider a disinfectant that is non-corrosive, free of harsh odour and backed by efficacy data, as the final step after washing.

CHEMGENE HLD4H: A Final Step Mae Klong Shops and Homes Can Rely On

According to the product information, CHEMGENE HLD4H is a medical-grade high-level disinfectant made in England and used in hospitals, clinics, laboratories, schools, offices, airports, homes, and elderly and child care settings, which suits post-flood work that needs both efficacy and safety.

A 4-Stage Reopening Plan for Ratchaburi Food Shops and Market Stalls

The principle you must not skip: remove mud and clean first, then disinfect with Chemgene at the label dilution and contact time, then dry.

Stage 1: Assess and discard

• Put on boots, rubber gloves and a mask before entering. Cut the power and have an electrician check the wiring before use.
• Throw away ingredients, food, condiments and packaging that touched floodwater.
• Discard wooden chopping boards, sponges, hand towels and porous items that soaked.
• Photograph the damage as evidence.

Stage 2: Remove mud and clean

• Shovel out mud, working from the back of the shop toward the door.
• Scrub floors, walls up to the waterline, counters, sinks, shelving and table legs with clean water and detergent.
• Wash pots, pans, plates, bowls and cutlery with washing-up liquid, then rinse in clean water.

Stage 3: Disinfect with Chemgene HLD4H

• Dilute per the label, choosing a ratio suited to the job within the 1:30 to 1:200 range in the product information. Never mix with chlorine or other products.
• Spray or wipe floors, counters, shelves, freezers, sinks, doors, handles, the payment counter and customer tables.
• Leave it for the label contact time; do not wipe it off early.
• For surfaces and utensils that touch food directly, follow the label's instructions on rinsing with clean water afterwards.

Stage 4: Dry and monitor

• Open doors and windows, and use fans or a dehumidifier until surfaces are fully dry.
• Check timber cabinets and lower walls daily during the first week; if mould appears, clean and disinfect again.
• Once open, set regular rounds for disinfecting shared touch points during the day.
• Watch staff for symptoms; anyone with fever or diarrhoea should stay home and see a doctor.

Canal-Side Homes in Damnoen Saduak and Ban Pong: The Spots People Forget

Beyond shops, riverside and canal-side homes need careful attention too. These are the spots most often forgotten after the water drops:

• Landing steps down to the canal. Used daily and coated in algae and silt; scrub, then disinfect, and watch for slips.
• The family boat and paddles. Boats used to move supplies during the flood were in contaminated water the whole time. Wash them, then disinfect grab points. The product information says it does not corrode fibreglass or aluminium.
• Water tanks and jars. Empty old water, scrub, disinfect per the label and rinse thoroughly with clean water before use. A surface disinfectant is not for drinking water; drink bottled or boiled water.
• Bathrooms and around latrines. Floodwater can push sewage back up, so wash thoroughly and disinfect the whole room.
• Children's toys. Plastic toys can be washed and disinfected; soft toys that soaked for long should probably be thrown out.
• Motorbikes and vending carts. Wash mud off wheels and bodywork, then wipe-disinfect handlebars and grips.

At every stage, wear gloves and boots, keep the space ventilated and store the product out of children's reach.

Orchards, Packing Sheds and Farm Tools Around Photharam and Damnoen Saduak

Much of the land along the Mae Klong in Ratchaburi is given over to orchards and farms, and many families depend on them as much as on market trade. After the water drops, the packing shed, the storeroom and the tools come back into use quickly, often before anyone has thought about hygiene. Yet these are places where floodwater sat, rats sheltered and mud dried into every corner.

Treat the packing shed like a kitchen. Throw out cardboard boxes, sacks and baskets that soaked, shovel and wash the floor, scrub plastic crates, scales, tables and sorting trays with detergent, then disinfect them with Chemgene HLD4H at the label dilution and contact time, rinsing food-contact surfaces as the label directs. Wash pruning shears, ladders, sprayers and pump housings, then wipe-disinfect handles and grips. Because the product is described as non-corrosive to stainless steel, aluminium, rubber and plastic, it suits these tools when used as directed.

Wear boots and gloves whenever you walk the orchard while the ground is still waterlogged, and cover every scratch. Field rats are a real leptospirosis risk here, so any fever, headache or calf pain in the following weeks means a prompt visit to a doctor.

10 Reasons Ratchaburi Riverside Communities Choose Chemgene HLD4H

1. Medical-grade standard. A high-level hospital disinfectant made in England, according to the product information.
2. Right for food businesses. Covers bacteria and Salmonella, the main food risks after a flood.
3. Handles diarrhoea viruses and childhood viruses such as norovirus and hand-foot-and-mouth virus, as listed in the product information.
4. Fast-acting. The product page states it kills within 1 minute, making reopening easier to schedule. See product details
5. Stated surface protection of up to 14 days, suited to busy markets with constant foot traffic.
6. Kind to kitchen equipment. Non-corrosive to stainless steel, aluminium, rubber and plastic.
7. No harsh chlorine smell, so food shops can welcome customers without a chemical odour.
8. Good value. Dilutes up to 1:200 for the shop, the home and the landing steps alike.
9. Biodegradable, fitting for communities whose lives revolve around rivers and canals.
10. Multiple listed tests, including Mahidol University, NHS England, ISO, SGS, Intertek, CE and EN standards. See certifications

Before and After: A Riverside Noodle Shop (Example Case)

A Three-Phase Checklist for Ratchaburi Residents

While warnings are active and water is rising

• Check provincial and DDPM announcements every day.
• Move valuables, food and important documents up high.
• Stock boots, rubber gloves, masks and disinfectant in advance.
• Avoid wading; if you must, wear boots and cover any wounds completely.

The day the water recedes

• Check structural and electrical safety before entering buildings.
• Shovel mud, wash with detergent, rinse with clean water.
• Disinfect with Chemgene HLD4H at the label dilution and contact time.
• Dry with breeze, sun, fans or a dehumidifier.

The following two weeks

• Check walls and wooden furniture for mould.
• Disinfect shared touch points on a regular round.
• Watch household members; see a doctor at once for fever, diarrhoea or calf pain.
• Review your flood plan for next time together with neighbours.

Frequently Asked Questions

Q: Which Ratchaburi districts were warned in the 2026 flood?
A: According to Khaosod English on 29 September 2026, the Mae Klong overflowed and warnings covered Ban Pong, Photharam, Mueang, Bang Phae, Damnoen Saduak, Wat Phleng and Pak Tho. The DDPM report of 2 October 2026 said Ratchaburi had 7 affected districts and 3,663 households, with water still rising.

Q: How long should a food shop wait after the water recedes before reopening?
A: There is no fixed number, but reopen only after every stage is done: flood-touched ingredients discarded, mud removed, surfaces cleaned, disinfected per the label and fully dried, and the electrics and water supply checked.

Q: Can I use Chemgene on food-prep counters?
A: Yes, after washing, following the label's dilution, contact time and clean-water rinse instructions for surfaces that touch food directly.

Q: Can I use it on a fibreglass or aluminium boat?
A: According to the product information it does not corrode fibreglass or aluminium, so it can be used on grab points and boat floors after the mud is washed off, as directed.

Q: Can Chemgene replace mud removal?
A: No. Always remove the mud first; disinfectant works best on clean surfaces.

Q: How do I order from Ratchaburi?
A: Call 065-556-6294 or message LINE @whd268 for product information and delivery.

Q: What if a staff member gets diarrhoea after the flood?
A: They should stop work and see a doctor, especially with fever or severe symptoms. Then clean and disinfect the work area again. Disinfectant prevents spread on surfaces; it is not a treatment.

Reopen Your Shop and Return Home with Confidence After the Ratchaburi Flood

Wash away the mud, then finish with medical-grade CHEMGENE HLD4H.

Order CHEMGENE HLD4H

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

Related Links and References

• All Chemgene products
• WHD professional disinfection service
• Ozone odour-removal service
• Khaosod English (29 Sep 2026): More than 2.6 million people affected by floods across Thailand
• World Health Organization: WHO fact sheets
• CDC: Floods and your health
• Department of Disease Control, Thailand: ddc.moph.go.th

Situation details follow news and DDPM reports as of the dates stated; figures may change daily.