Life in Ratchaburi has been tied to the Mae Klong River for generations: riverside communities, old markets, floating markets and orchards. In early October 2026, that same river burst its banks. According to the Department of Disaster Prevention and Mitigation (DDPM) report of 2 October 2026, seven districts of Ratchaburi province were affected: Photharam, Bang Phae, Damnoen Saduak, Mueang Ratchaburi, Ban Pong, Wat Phleng and Chom Bueng, covering 3,663 households, with the Mae Klong overflowing its banks. These figures can change daily, so keep following DDPM and provincial announcements.

Nationally, DDPM reported the same day that 31 provinces plus Bangkok were flooded, affecting 1,245,581 households or 3,535,206 people, after sustained heavy to very heavy rain and northern runoff. Ratchaburi's household count may look small next to some provinces, but for each family whose home went under water the damage and health risk are no smaller, especially for homes and businesses right on the riverbank.

This guide is for Ratchaburi residents whose homes, homestays, cafes, shops or small workshops were flooded by the Mae Klong or its canals. It explains every kind of germ the flood brings (bacteria, viruses, mold and musty odor), the right recovery order, and how ozone disinfection serves as the final step after washing and drying.

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

A Mae Klong homestay in Photharam that must be ready before the cool season

Ann and her husband returned to their hometown in Photharam district several years ago and turned the family's old wooden riverside house into a small homestay: six guest rooms, a timber deck over the Mae Klong, and a ground-floor coffee corner popular with locals. Most guests are Bangkok residents driving down for weekends, and from late in the year, when the weather cools, rooms are full almost every night.

In late September the river kept rising until it spilled over the bank onto the property, flooding the coffee corner and three ground-floor guest rooms to mid-shin for several days. Mattresses, sheets, curtains and doormats were soaked. The wooden bar counter swelled; the fridge and espresso machine were lifted in time, but the glassware cabinet was not. Ann had to postpone every booking and take her mother, in her seventies, to stay with relatives on higher ground.

When the water dropped, the couple shoveled mud, hosed floors, threw out mattresses and opened every window. A week later the rooms looked clean, but a smell of river mud and mustiness lingered, especially on humid mornings. Dark blotches appeared low on the folding wooden wall panels, and green mold spots grew under the bar counter that could not be removed. Ann worried that if guests walked in and smelled this, years of online reviews could be damaged overnight. She also worried about her mother, who has allergies and wants to come home.

Ann's story mirrors many riverside homes and businesses in Photharam, Ban Pong and Mueang Ratchaburi. Beyond health, income and reputation need restoring too, so recovery must be done in order and finished properly, not just made to look clean.

The Mae Klong overflow: what the Ratchaburi flood brings indoors

The Mae Klong runs through the heart of Ratchaburi, from Ban Pong and Photharam through Mueang Ratchaburi and down toward Bang Phae, Damnoen Saduak and Wat Phleng, where many branch canals connect. Both banks hold old communities, markets, temples, wooden houses, shophouses, riverside restaurants and orchards. When the river overflows, water goes straight into places where people live and work.

Overflowing water lifts fine silt from the riverbed and mixes with water that has run over roads and through drains, household septic tanks, fresh markets, restaurants and farmland. In Bang Phae and Damnoen Saduak, with dense canals and raised-bed orchards, water may cross vegetable plots, orchards and animal pens. Chom Bueng lies farther from the river, so flooding there may come from heavy rain and local waterways, which still carry mud and contaminants indoors.

River silt is fine and sticky, working into wood grooves and tile joints. Once dry it turns to dust that rises when swept and may carry microbes, so wash or wet-wipe instead of dry-sweeping, and wear a mask.

Many traditional Ratchaburi riverside homes have timber walls, folding panels and plank floors that absorb water readily, while shophouses in town and Ban Pong have plaster walls, gypsum ceilings and built-in cabinets. Both hold moisture for a long time and grow mold if not dried properly.

Every kind of germ the Ratchaburi flood brings

Bacteria from sewage and riverbank mud

Floodwater that crosses communities and markets often carries fecal bacteria such as E. coli and organisms behind food poisoning and diarrhea. They cling to floors, counters, utensils and submerged belongings. For restaurants, cafes and homestays with kitchens this matters greatly, because germs can reach guests through food-contact surfaces. Symptoms include diarrhea, stomach pain, nausea, vomiting and fever; frequent stools, severe weakness or blood in the stool need a doctor.

Leptospirosis is another concern along rivers, markets and orchards. Bacteria from the urine of rats and some animals mix into water and mud and enter through wounds or long-soaked skin. Key signs are sudden high fever, headache, muscle pain especially in the calves and red eyes. Anyone who waded or cleared mud and develops these within a few days to two weeks should see a doctor at once and mention the flood exposure.

Wounds from broken tiles, wood or glass hidden in mud can become infected. Always wear thick-soled boots when cleaning, and get deep or dirty wounds treated.

Viruses spread by hands, food and surfaces in busy places

Norovirus and rotavirus cause sudden vomiting and diarrhea and spread easily through hands, food and contaminated surfaces. Busy places such as floating markets, restaurants and guesthouses must prioritize hand-washing and disinfecting high-touch surfaces. Hepatitis A is linked to unsafe water and food, so use clean water for washing and cooking after the flood.

Mold: the enemy of wooden houses, guest rooms and soft furnishings

Public health agencies such as the CDC note that mold can start growing on wet materials within 24 to 48 hours, so Mae Klong homes that held water for days are at high risk. Aspergillus, Penicillium and some black molds grow on wood, damp plaster, curtains, mattresses, sofas, carpets, books and cardboard. Airborne spores cause sneezing, congestion, itchy eyes and coughing and can trigger asthma or allergies, exactly what worries Ann about her mother. In a guest room, a mold smell is noticed instantly.

In Ratchaburi riverside homes and lodgings, mold hides under wooden counters, behind wardrobes against walls, under beds, along the lower edge of timber walls and folding panels, under carpets, in windowless bathrooms and inside air conditioners.

Odors: river mud, drains and mustiness

River-mud smell comes from organic matter in silt rotting without oxygen; a rotten-egg smell from sulfur compounds in sewage; old-room mustiness from mold; and a sour smell from fabrics that never fully dried. These signal remaining moisture or microbes, so candles and air freshener help only briefly.

At-risk groups to protect first

Elderly people, young children, pregnant women, people with chronic illness, allergies or asthma, and anyone with weak immunity should leave heavy cleaning to others, return only once the house is dry and restored, and see a doctor promptly if unwell. Ozone treats the home environment; it is not a medical treatment.

How recovery differs for Ratchaburi homes and businesses

Wooden homes and homestays along the Mae Klong in Photharam, Ban Pong and Mueang: wood dries slowly. Lift carpets, move wardrobes off walls and let air flow under floors and behind panels. Guest rooms should replace all flooded mattresses and linen rather than simply washing and reusing them.

Shophouses and commercial buildings in Mueang Ratchaburi and Ban Pong: plaster walls, ceilings and ground-floor built-ins are the risk points. Food and drink businesses must discard flooded ingredients, disinfect food-contact surfaces and check grease traps and drains.

Canal-side homes and shops in Damnoen Saduak and Bang Phae: often wooden houses with a shop or storeroom downstairs. Sort flooded goods strictly and prepare the space to welcome visitors again.

Farm and community homes in Wat Phleng and Chom Bueng: flooded fertilizer, pesticide and tool stores must be cleaned separately with protective gear; ask local authorities how to dispose of damaged chemical containers.

Small factories and workshops: Ratchaburi has ceramics works and many small businesses. Flooded offices, staff rooms and stockrooms deserve the same recovery as homes, for workers' health.

What follows the flood in Ratchaburi

Health: the cleanup rush is when illness risk peaks, from wounds, mud dust and living in a damp house. Elders and allergy sufferers often flare up.

Income and the tourist season: late in the year visitors flock to Ratchaburi's riverside lodgings, floating markets and restaurants. Unfinished recovery can cost a whole season.

Online reputation: for lodgings and restaurants, reviews are capital built over years. A few guests writing that a room smelled musty can affect bookings for a long time.

Paying twice: painting or installing new furniture while walls and floors are still damp lets mold return, meaning a second repair bill.

Family: many Mae Klong households include elders deeply attached to their home. Making it safe to return supports body and mind.

Why the smell stays after cleaning: common mistakes

Dry-sweeping mud: dried river silt turns to dust that spreads germs through the house. Hose or wet-wipe instead.

Bleach alone: fine on hard surfaces, but it barely penetrates porous wood and walls, so deep mold survives. Never mix it with ammonia or other cleaners.

Washing and reusing guest linen straight away: fabrics soaked in dirty water for long should be considered for disposal; usable items need hot washing per label and full sun-drying.

Spraying fragrance in guest rooms: guests then smell perfume plus mustiness, often worse than mustiness alone, and the cause remains.

Painting or varnishing damp wood: it traps moisture and mold beneath the surface, causing rot and regrowth.

Running the air conditioner uncleaned: a unit that pulled in damp air blows odor and spores back out every time.

All of these address only what is visible. Ozone handles germs and odors in the air, in corners and where hands cannot reach, after mud removal, washing and drying.

WHD ozone disinfection for Ratchaburi homes and lodgings

Ozone (O3) is a strongly oxidizing gas. Released in a closed space at a controlled concentration, it spreads through the room, into furniture gaps, under beds, beneath counters and into timber joints, breaking down the cell structures of bacteria, mold and viruses and reacting with odor molecules. It then reverts to oxygen (O2), leaving no chemical residue, so guest rooms have no lingering chemical smell after ventilation.

According to test results certified for the company by Thailand's Department of Medical Sciences and Intertek (UK), the World Health Disinfection (WHD) ozone system eliminates viruses, bacteria and mold by 99.99% under test conditions.

Service steps

1. Consultation and assessment: share your district, building type, number of rooms, flood height and photos via LINE.
2. Readiness check: water gone, mud and damaged items removed, surfaces washed, space reasonably dry.
3. Room preparation: all people, pets and plants leave; cabinets and drawers open; external doors and windows closed. Lodgings and shops should close to customers on treatment day.
4. Ozone treatment: about 30 minutes per zone; multi-room lodgings are treated zone by zone.
5. Rest and ventilation: ozone reverts to oxygen, then the space is aired before use.
6. Ongoing advice: humidity control, spots to watch and when to start repairs.

Safety first: ozone treatment happens only in an empty, closed space with no people, pets or plants inside. Nobody enters during treatment, and re-entry is allowed only after the rest and ventilation period the team specifies.

Travel and coverage: WHD is based in Bang Khae, Bangkok 10160, and has no branch in Ratchaburi. The team can plan visits to Photharam, Bang Phae, Damnoen Saduak, Mueang Ratchaburi, Ban Pong, Wat Phleng and Chom Bueng, with area, timing and travel confirmed by phone at 065-556-6294 or LINE @whd268. Schedules depend on real road conditions, so same-day arrival cannot be guaranteed.

Ozone jobs of 15,000 baht or more include a free medical-grade disinfectant spray, handy for surfaces guests and family touch often.

10 reasons Mae Klong homes and businesses choose ozone after the flood

1. Odor-free guest rooms before the late-year tourist season.
2. It reaches spots you cannot dismantle, like under wooden counters, behind built-in wardrobes and timber joints.
3. No chemical smell left behind, since ozone returns to oxygen.
4. It covers bacteria, viruses and mold through a residential ozone disinfection service tested to 99.99% per company-certified results.
5. Fewer airborne spores for elders and allergy sufferers once ventilation is complete.
6. About 30 minutes per zone, so a shop or lodging closes only briefly.
7. It protects reviews and reputation with rooms that are clean to the eye and the nose.
8. Repairs last: done after drying, it lowers the chance of mold regrowth.
9. Many building types: homes, homestays, hotels, restaurants, offices and factories. See the ozone service page.
10. A team that helps plan recovery from the start. Talk to WHD.

Before and after: a Mae Klong home and homestay restored in order

Note: results depend on damage, initial cleaning and humidity control afterwards. Rotten or deeply moldy materials still need replacing.

Example case (a hypothetical scenario to explain the process, not a real customer review)

A souvenir shop in a canal-side wooden house in Damnoen Saduak

Auntie Sri and her daughter run a souvenir and Thai sweets shop on the ground floor of a canal-side wooden house in Damnoen Saduak district, with the family living upstairs. Most customers are tourists arriving by boat for the floating market. When the canal rose and flooded the shop almost knee-deep for several days, wooden shelves, woven trays, cardboard stock boxes and the glass sweets display were all submerged.

Once the water receded, Auntie Sri discarded all flooded goods and sweets in line with food-safety advice. Her daughter hosed the plank floor and walls, threw out moldy trays and left the shop open for days. Still, it smelled musty with a canal-mud note. Not wanting returning tourists to meet that smell, the daughter contacted WHD on LINE.

The team advised waiting until the floor was truly dry, running dehumidifiers overnight while the shop was closed, removing all goods and food, and closing up the shop's openings as far as possible on treatment day. Ozone was then scheduled for the shop and storeroom, with the family staying with relatives during treatment and ventilation. Afterwards the smell dropped clearly. Auntie Sri switched to raised shelving and lidded plastic boxes, reopened, and now wipes surfaces with disinfectant every morning. For food sellers, discarding and cleaning always come first; ozone is the finishing step that readies the space for customers.

Ratchaburi flood recovery checklist

Before going back in

• Follow DDPM and Ratchaburi announcements and Mae Klong water levels.
• Cut power at the main; have flooded systems checked by an electrician.
• Wear thick-soled boots, rubber gloves and a mask; watch for glass and venomous animals.

During cleanup

• Hose or wet-wipe mud, do not dry-sweep; wash with detergent, then disinfect per label.
• Discard flooded food, medicine, mattresses and long-soaked fabrics.
• Lift carpets, move furniture off walls, ventilate and run dehumidifiers.
• Check drains, grease traps and septic tanks; clean air conditioners before use.

Ozone day and after

• Everyone, pets and plants out; return only when the team confirms ventilation is complete.
• Open cabinets, close external openings, remove food and goods.
• Ventilate daily, control humidity, watch former mold spots; wait for full dryness before painting.
• See a doctor promptly for fever, calf pain, diarrhea, persistent cough or an inflamed wound.

FAQ: ozone after the Ratchaburi flood

Must a multi-room homestay close entirely on treatment day?

The team can treat zone by zone, but the zone being treated and any connected areas must be empty. Plan it for a period without guests.

Does WHD have a branch in Ratchaburi?

No. WHD is based in Bang Khae, Bangkok, and plans visits to Ratchaburi, confirmed by phone at 065-556-6294 or LINE @whd268.

If we use ozone, can we skip washing?

No. Ozone follows mud removal, washing and drying, and does not replace cleaning or removing damaged materials.

How long does it take?

Typically about 30 minutes per zone, plus preparation and ventilation time, depending on area and number of rooms.

Can we stay inside during treatment?

No. Everyone, pets and plants must leave the treated area and return only after the rest and ventilation period.

Does ozone prevent post-flood illness?

It reduces germs in the air and on indoor surfaces but does not treat or prevent disease in the body. See a doctor for any symptoms after flood exposure.

Is your Ratchaburi home or riverside business still musty after the flood?

Talk to WHD about post-flood ozone disinfection for homes, homestays, restaurants and shops in Photharam, Ban Pong, Damnoen Saduak and every affected district.

See the Residential Ozone Disinfection Service

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

Ozone jobs of 15,000 baht or more include a free medical-grade disinfectant spray.

Related pages

• Residential and Building Ozone Disinfection
• Disinfection service
• Test certificates
• Contact us

References

• Bangkokbiznews: DDPM flood situation report
• Thai PBS: flood situation
• CDC: Floods
• WHO fact sheets