A story from the field: the canal-side café that went quiet for two weeks

Ton and Mint run a café and home-style bakery in an old shophouse on Ko Mueang, the island at the heart of Phra Nakhon Si Ayutthaya, just a short walk from the temples and ruins where visitors stop for photos. The place is decorated with reclaimed wood. There is a linen sofa by the window, a wooden bar counter, an espresso machine, a cake display fridge and a small kitchen at the back where they bake bread and croissants every morning before sunrise. At the end of September 2026, the Chao Phraya, Pa Sak and Lopburi rivers all rose at once. Roads around the island flooded and water came into the café at roughly knee height, staying for almost two weeks.

When the water finally went down, the couple pushed open the glass door. The smell that used to greet them, roasted coffee and warm butter, was gone. In its place was a damp, musty odor mixed with river mud. The linen sofa had turned a dull brown, with patches of black mold. The laminate floor had swollen and buckled. The legs of the wooden tables carried water stains and fluffy white mold. In the storeroom at the back, bags of flour had soaked through and set into lumps, and the fridge, which had been without power for days, released a sour smell of spoiled milk the moment the door opened.

What worried Mint most was simple: this is a food and drink business. Guests eat and drink what comes out of this kitchen. The end of the year is Ayutthaya's peak tourist season, and regulars were already messaging the café's page: "When are you reopening? I miss your croissants." But if they reopened too soon and guests smelled damp, or someone got an upset stomach after eating a pastry, the reputation they had built over years could collapse with one post.

Ton and Mint are not alone. All over the old city and along the rivers, from Hua Ro market to the guesthouse lanes near the night market, small food and drink businesses are facing the same decision: how do we reopen quickly, but properly? This guide explains why cafés and bakeries need a more careful recovery than many other businesses, why the common shortcuts fall short, and how World Health Disinfection (WHD) uses disinfection fogging and ozone treatment as part of a sensible reopening plan.

Why food and drink businesses must recover more carefully than others

Floodwater is never just water. It carries sewage, waste, dead animals and germs from drains and canals. When it flows through a café or bakery, all of that settles on floors, walls, table legs, under counters and into the gaps around kitchen equipment. If cleaning does not reach every surface, and food preparation starts again, those germs have a path into food and drinks.

The kitchen and dry store. These are the highest-risk areas. Flour, sugar, coffee beans and any dry goods that touched water, or sat for days in a closed, humid room, should all be thrown away. Shelving and storeroom floors must be cleaned and disinfected before any new stock comes in. Paper packaging, cardboard boxes and cake boxes that were stored low are also a breeding ground for mold.

Espresso machines, fridges and ovens. These are expensive pieces of equipment. If water reached the base or the electrical parts, a technician must check them before they are switched on. Fridges that were without power for a long time often hold a spoiled smell in the door seals and inner walls that ordinary wiping cannot remove.

Fabric and wooden furniture. The things that make a café feel warm and inviting, such as sofas, seat cushions, throw pillows, curtains and old wooden tables, absorb a great deal of water and odor. Mold grows easily on the surface and deep inside.

Old shophouses on Ko Mueang. Many have aging plaster walls and wooden ceilings. Moisture wicks up the walls well above the actual flood line, so the musty smell is not only at floor level; it fills the whole room. Wooden ceilings and the space between floors can hold damp for weeks.

Water supply and filters. Coffee and baking depend on clean water. Tanks, pumps and filter systems that were flooded may be contaminated and need to be cleaned, disinfected and fitted with new cartridges before use.

The full picture of the impact on a café owner

Health. Bacteria from floodwater can cause diarrhea and food poisoning if they find their way into food. People cleaning out the café need to be careful about leptospirosis, which can enter the body through cuts when skin touches contaminated water or mud. Mold spores in the air can trigger allergies and asthma, both in staff who spend the whole day in the shop and in guests who sit for hours working on laptops or chatting over coffee.

Money. Cafés have high fixed costs: rent, wages and ingredients that must be thrown away. Reopening fast but unprepared can force a second closure, which hurts far more than spending an extra day or two recovering properly. Replacing equipment, furniture and stock already strains cash flow; avoiding repeat work matters.

Reputation. Cafés in Ayutthaya rely heavily on online reviews and tourists. A photo showing mold on a wall, or a review that says "the café smelled musty", stays online for a long time and influences new customers who have never visited. Visitors comparing cafés on a map app will simply pick another one.

Time. After the water recedes, every builder and technician has a long queue. Owners need to put the work in the right order: clean and disinfect first, then repair and decorate. Otherwise, new paint and new flooring may have to be torn out again when mold returns underneath.

Why the shortcuts many shops use do not work

Pouring bleach and scrubbing the floor. This helps some hard surfaces, but it does not reach under the counter, behind the display fridge or into the fabric of the sofa. A lingering chlorine smell also interferes with the aroma of coffee and baking, which is the heart of a café, and bleach can stain and damage old wood.

Running fans for days. Floors may dry faster, but moisture inside old plaster walls and wooden ceilings stays high. Fans can also spread mold spores across the shop and into the kitchen, which is the last place you want them.

Lighting candles or roasting coffee to cover the smell. Many owners think of this first. But the musty smell comes back as soon as the shop is closed overnight, and guests with sensitive noses notice it immediately when they walk in the next morning.

Repainting and wallpapering straight away. If the wall is still damp and mold is still alive, it grows again under the paint or wallpaper within a few weeks. The owner ends up paying to decorate twice, and may have to close again to do it.

Reusing everything that "looks fine". Sealed tins and bottles may be saved after cleaning, but opened packets, paper cups, napkins and anything porous that sat in a damp storeroom should not be trusted. Saving a little now can cost a lot later.

The solution: Chemgene HLD4H disinfection fogging + ozone treatment before you reopen

World Health Disinfection uses our disinfection spraying service with Chemgene HLD4H, a high-level disinfectant, applied with ULV fogging equipment. The very fine droplets drift under counters, behind display fridges, around table legs, along storeroom shelves and into corners a cloth cannot reach, helping to reduce bacteria, viruses and fungi on surfaces throughout the café.

Next comes our ozone treatment service. Ozone gas spreads through the whole shop and penetrates sofa fabric, cushions, wood and every joint and gap. It helps destroy mold spores and breaks down odor molecules instead of masking them. After treatment, ozone breaks back down into oxygen, so the café is left with clean air, ready for coffee and pastries to be the star again.

For a food business, the order of work matters as much as the tools. Our team plans the job so that food, ingredients and utensils are out of the way first, disinfection and ozone happen while the shop is empty, and food-contact surfaces are rinsed or wiped afterwards before any cooking resumes.

Our step-by-step process for cafés and bakeries

1. Site survey. We look at the front of house, kitchen, dry store, flood height, furniture materials and air conditioning to plan the amount of disinfectant and the ozone treatment time.
2. Clean-up and sorting advice. Wash out the mud, throw away any ingredients that were wet or stored in damp conditions, move food, drinks, cups and crockery out of the area, and unplug the espresso machine, ovens and fridges.
3. ULV disinfection fogging. We fog floors, flood-affected walls, counters, table legs, chairs, shelving and the storeroom.
4. Ozone treatment. The shop is sealed and the generator runs for a time matched to the space. No people, pets or plants may be inside.
5. Ventilation. Doors and windows are opened and fans used until the ozone has broken down, before anyone goes back in.
6. Re-check and food-contact surfaces. We check the smell and any damp spots, advise you to rinse or wipe food-contact surfaces with clean water according to product instructions before preparing food, and help plan ongoing humidity control.

Ozone safety: No people, pets or plants may be in the café during treatment, and the space must be ventilated adequately before anyone returns. All food, ingredients and drinks must be removed first. Our team controls the ozone dose to suit the room size. Electronics that are sensitive to moisture or ozone, such as POS terminals, ordering tablets and speakers, and any artworks or paintings on display, should be covered or moved out beforehand, as should fridge door seals and other sensitive rubber parts where possible.

10 reasons Ko Mueang cafés choose a professional recovery

1. Lower contamination risk before food goes back on sale, thanks to thorough disinfection fogging.
2. Coffee becomes the hero again. Ozone treatment breaks down musty odors at the source.
3. It reaches into sofa fabric and cushions, which surface wiping cannot do.
4. No chlorine smell to spoil the taste and aroma of drinks.
5. A high-level disinfectant. Chemgene HLD4H works on a wide range of surfaces.
6. ULV fog reaches under counters and behind fridges that are hard to clean.
7. The right order of work. Disinfect before repairing and decorating, so you are less likely to redo work.
8. Reopen sooner, with confidence. Most jobs finish in a day including ventilation.
9. Easy daily care afterwards with the Chemgene HLD4H spray for guest tables and high-touch surfaces.
10. A clear story for guests. Tell them the café has been disinfected and ozone-treated; read more about ozone deodorizing.

In the owner's words

"We wanted to reopen as fast as possible, but every morning when we opened the door it still smelled musty. We didn't dare bake in those conditions. After the team fogged and ozone-treated the café, and we rinsed the kitchen surfaces as they advised, the air felt so much better. On the first day we roasted coffee again, the smell of coffee really filled the whole shop."

— Mint (pseudonym), café and bakery owner, Ko Mueang, Phra Nakhon Si Ayutthaya, a scenario from the field

A 7-point checklist before reopening your café

1. Have an electrician check wiring, sockets and breakers before switching on any equipment.
2. Have a technician inspect the espresso machine, grinder, ovens and any fridges that water reached.
3. Throw away all ingredients, packaging and food that touched water or sat in damp conditions.
4. Clean and disinfect water tanks and filters, and fit new filter cartridges.
5. Wash every glass, plate and piece of cutlery before use, even items stored in closed cabinets.
6. Clean the air-conditioner filters and consider a full AC service if it blows out a musty smell.
7. Plan rodent and cockroach control, as pests often move in after a flood, and if mosquitoes are a problem around the shop consider our mosquito spraying service.

Once you reopen, keep a simple routine: wipe guest tables and door handles with disinfectant between busy periods, keep the dry store off the floor and away from walls, check corners and the back of the fridge weekly for new mold, and run the air conditioner or a dehumidifier to keep humidity down during the remaining rainy weeks.

Telling guests you are back

Your reopening announcement is a chance to rebuild trust. Keep it honest and practical: say that the café was cleaned out, disinfected and ozone-treated, that all ingredients are new and that equipment has been checked. A few photos of the clean, bright shop help more than any slogan. Inside, let guests see the small habits that show you care: tables wiped between guests, pastries kept covered, staff washing hands and a fresh, neutral smell when they walk in.

Many regulars are genuinely happy to support a local business that has been through a flood. When they can see that you took safety seriously, they become your best ambassadors, posting photos and sending friends your way during the tourist season. A small reopening menu, with your best-loved drinks and a few signature pastries, also makes the first weeks easier to manage while staff settle back into their routine.

Special notes for bakeries and dessert shops

Bakeries face a few risks that a coffee-only shop does not. Flour, sugar, cocoa, nuts and dried fruit are all porous or powdery and pick up moisture and odor from the air very easily. Even sacks that were stored on a high shelf, well above the flood line, may have absorbed humidity during the days the shop was closed and sealed. If you open a bag and notice clumping, a stale or musty smell or any discoloration, do not use it. Mold in baking ingredients is not always visible to the eye.

Proofing cabinets, dough mixers and sheeters have motors, seals and small gaps where silt and moisture can hide. They should be inspected by a technician, cleaned thoroughly and dried completely before use. Wooden proofing boards, cloth couches used for baguettes, banneton baskets and wooden rolling pins that touched floodwater are very hard to sanitize properly and are usually better replaced.

Display fridges for cakes and desserts need extra attention. If power was off for days, any remaining stock must be thrown away, and the inside should be washed, disinfected and aired out with the door open before it is switched on again. Pay special attention to the drain hole and drip tray at the bottom, where spoiled liquid tends to collect and produce persistent odor.

Finally, think about packaging. Paper bags, cake boxes, labels and napkins stored in a damp storeroom can carry mold spores and a musty smell straight to the customer. Order fresh supplies and store them in sealed plastic containers off the floor until the building is fully dry. These small details are what customers notice when they open a box at home.

If you are unsure whether an item is safe to keep, the simple rule used by many food businesses after a flood is this: when in doubt, throw it out. Ingredients and packaging are far cheaper to replace than a damaged reputation or a guest who falls ill.

Frequently asked questions

Q: Is disinfection fogging safe in a kitchen where food is prepared?
A: Our team will ask you to move food, ingredients and utensils out first, and will advise you to rinse or wipe food-contact surfaces with clean water before you start preparing food, in line with the product's instructions.

Q: Will ozone affect the coffee beans in my hoppers?
A: Do not leave coffee beans, tea, milk or any ingredient in the café during treatment; move everything out. Beans that sat in a damp shop during the flood should be replaced anyway.

Q: Will ozone remove the black mold stains on our fabric sofa?
A: Ozone helps destroy spores and reduce odor, but black stains embedded in fabric may still be visible. If staining is heavy, we recommend replacing the cover or the cushions.

Q: How many days do we need to close?
A: The disinfection and ozone part usually finishes within one day including ventilation, depending on the size of the shop. Other repairs depend on the damage.

Q: Should we do this before or after repairing floors and repainting?
A: Clean out mud and disinfect first, let the walls dry, then repair and paint. Once decorating is finished, a second ozone session can help reduce paint smells and any remaining mustiness.

Q: Which parts of Ayutthaya do you cover?
A: Ko Mueang and the rest of Phra Nakhon Si Ayutthaya district, plus Bang Pa-in, Bang Ban, Bang Sai, Uthai, Wang Noi and nearby areas.

Ready to reopen, with the smell of coffee filling the room

Talk to World Health Disinfection about disinfection fogging and ozone treatment for your coffee shop, café or bakery on Ko Mueang, Phra Nakhon Si Ayutthaya.

See Disinfection Service – Click Here

Book Ozone Treatment – Click Here

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

Related services and articles

• Ozone odor and chemical residue removal
• Mosquito spraying service
• Master Ozone Generator
• Read all articles

Sources: WHO – Floods and health and Department of Health, Ministry of Public Health, Thailand