A Story from the Field: Bare Feet and a Hand's Depth of Mud

Khun Weera is in his early fifties and lives in a two-storey townhouse off Pracha Uthit Road in Thung Khru, on the southern edge of Bangkok. During the 2026 floods, water from the surrounding canals mixed with rain that the drains simply could not carry away. It crept into his ground floor and sat there, roughly shin-deep, for almost a week. When it finally drained, it left behind a layer of grey-black mud nearly a hand's width thick, a smell like an open sewer, and a dead-straight tide line running across every wall downstairs.

On the first morning back, Khun Weera did what many of us would do. He rolled up his trousers, kicked off his sandals at the door, and started shovelling mud with an old spade and his bare hands. He wanted his home back as fast as possible. Halfway through the morning he stepped on a shard of broken floor tile and cut the sole of his foot. It was a small cut, so he rinsed it under the tap and kept going. Meanwhile his daughter, trying to help, poured a toilet-bowl cleaner and household bleach into the same bucket, thinking the mix would be stronger. Within minutes both of them had stinging eyes and were coughing so hard they had to run outside for air.

A few days later Khun Weera developed a fever and an unusual, deep ache in his calf muscles. At the hospital, the doctor asked detailed questions about wading through floodwater and about the cut on his foot. He was examined and treated early, and he recovered. When he later called our team to disinfect the house, he told us something we hear again and again: "I thought once the water was gone, the danger was gone. Actually, the mud cleanup was the riskiest part."

Stories like this are common in Thung Khru, Bang Mot, Phutthabucha and along Pracha Uthit after a flood. This article is a practical, no-nonsense guide for families who are about to start the cleanup: what to wear, what order to work in, what not to do, and exactly when to hand over to professionals for disinfection fogging and ozone shock treatment.

Why Flood Mud Is More Dangerous Than It Looks

The mud a flood leaves behind is not just soil and sand. It is a mixture of drain water, overflow from septic tanks, canal sediment, rotting organic matter, dead animals, household rubbish, and sometimes chemicals from garages, workshops or small factories upstream. When the water recedes, all of that settles on your floors, in the corners of staircases, under cabinets and inside the cracks between tiles. It looks like dirt. It behaves like a contaminated waste layer.

Here are the main hazards to keep in mind before you pick up a shovel:

• Leptospirosis (rat-urine disease). The bacteria that cause leptospirosis are shed in the urine of rats and other animals and survive in floodwater and wet mud. They can enter the body through cuts, scrapes and skin that has been soaked for a long time, as well as through the eyes and mouth. Early symptoms often include sudden high fever, headache and marked pain in the calf muscles. If you develop symptoms after wading in floodwater or cleaning mud, see a doctor promptly and tell them clearly about your exposure.
• Gastrointestinal illness. Bacteria such as E. coli from sewage can stay on your hands and reach your mouth when you eat a snack, drink from a bottle or smoke during a break. The result can be diarrhoea, vomiting and dehydration, which is especially risky for children and older people.
• Wound and skin infections. Glass, nails, broken tiles and sharp sheet metal are often hidden under the mud. Any wound that comes into contact with flood mud has a higher risk of infection, and tetanus is a real concern if vaccinations are not up to date.
• Mold and airborne spores. As mud dries, mold spores are released into the air every time you sweep or scrub. People with allergies or asthma may find their symptoms flare up quickly. Mold also begins to grow on wet walls, wood and fabric within a day or two.
• Electrical and gas hazards. Sockets, extension leads and distribution boards that were under water can still leak current. Gas cylinders may have tipped over, and regulators or hoses may be damaged.
• Chemical exposure. Floodwater can carry fuel, oil, pesticides and cleaning products. Add the chemicals people use during cleanup, often mixed incorrectly, and the air inside a closed house can quickly become irritating or even toxic.

Beyond health, cleaning the wrong way also costs money. If mud is scrubbed off the surface but moisture and mold remain under skirting boards, walls must be opened up again later. If a family member falls ill, someone has to stay home from work. A careful, well-ordered cleanup is cheaper in the long run.

The Minimum PPE Kit Before You Touch the Mud

PPE stands for Personal Protective Equipment. For a household flood cleanup, you do not need a hazmat suit, but you do need a sensible minimum kit for every person who works inside the house:

1. Rubber boots, at least mid-calf height. Choose thick, non-slip soles. Never work in flip-flops or bare feet. Feet are the main entry point for leptospirosis and the body part most likely to be cut by hidden debris.
2. Long, heavy-duty rubber gloves that reach the elbow. If you need to pick up broken glass, metal or wood with nails, wear cut-resistant or thick cloth gloves underneath the rubber layer.
3. An N95 respirator or equivalent. This matters most when you sweep drying mud, pull up carpets, remove wet mattresses or work near walls with visible mold. A cloth or thin surgical mask offers very limited protection against spores.
4. Splash goggles. Muddy water and cleaning solutions splash more than you expect, especially when you hose down walls or scrub at shoulder height.
5. Long sleeves and long trousers. Thick fabric or disposable waterproof coveralls reduce skin contact. Tuck trousers into boots, or seal the gap with tape, so mud cannot run inside.
6. Waterproof plasters and a basic first-aid kit. Cover every existing cut before you start. Keep clean water, soap and wound antiseptic close to the work area, not buried in a car boot.

Taking PPE off correctly matters as much as putting it on. At the end of each work session, rinse your gloves and boots with clean water while you are still wearing them. Remove gloves by peeling them inside out so your bare hands never touch the outer surface. Then wash your hands and forearms with soap for at least twenty seconds. Work clothes should be washed separately from children's and elderly family members' clothes, and boots should be left to dry outside the living area.

It is also worth agreeing on simple house rules: no eating, drinking or smoking in the work zone; a clean "rest area" outside where people take off gloves before touching food; and regular breaks, because tired people make mistakes with sharp tools and chemicals.

A Safe Order of Work: Eight Steps

1. Cut the power before you go in. Switch off the main breaker from a dry spot. If the distribution board was under water, have a qualified electrician inspect it before you turn anything back on. Close every gas valve and move cylinders outside if they were affected.
2. Photograph the damage. Take pictures of the water line on the walls, damaged furniture, appliances and the structure. You may need them for insurance claims or for applying for government flood assistance.
3. Open doors and windows. Let the house air out for at least thirty minutes before heavy work begins. This reduces odours and moisture and helps clear any chemical fumes.
4. Remove what cannot be saved. Mattresses, carpets, fabric sofas, cardboard and paper that have soaked in sewage-contaminated water for days are usually not recoverable. Separate them for disposal in the way your district office specifies, and do not leave them stacked inside the house where they keep releasing moisture and smell.
5. Shovel and push mud out while it is still wet. Wet mud produces far less dust and fewer airborne spores than dry mud. Use plastic shovels and rubber squeegees to push it out through the door. Do not wash thick mud into indoor drains; it will block them and push dirty water back into the house.
6. Wash with clean water and detergent. Scrub floors, tiled and concrete walls, skirting boards and the legs of furniture. Work from top to bottom and from the inside of the house outwards, so you do not drag dirt back over cleaned areas.
7. Never mix cleaning products. Bleach must never be mixed with ammonia, acidic toilet cleaners or vinegar; these combinations release toxic gases. Use one product at a time, follow the label, and rinse the surface before switching products.
8. Dry the surfaces, then stop and call the professionals. Once surfaces are free of mud, this is the ideal moment for disinfection fogging and ozone treatment. Disinfectants and ozone work best on clean surfaces, without thick organic deposits shielding the germs underneath.

If your household includes older people, young children, pregnant women or anyone with a chronic illness, ask them to stay elsewhere during the mud cleanup, and do not let them help in areas with heavy mold growth. Their immune systems and lungs are more vulnerable, and the cleanup period is when exposure is highest.

Why a Clean-Looking Floor Does Not Mean a Safe House

Many families believe the job is done as soon as the floor looks clean. Unfortunately, the most common do-it-yourself fixes have serious limits:

• Pouring bleach everywhere. Bleach loses strength quickly when it meets dirt and organic matter, it does not penetrate porous concrete, plaster and wood well, and its strong fumes irritate the airways. Used in a closed room it can make people feel ill without solving the hidden contamination.
• Running fans and nothing else. Fans dry the surface, but moisture deep inside walls remains. Worse, they can blow mold spores from one room to the rest of the house.
• Air fresheners. They mask odours for a few hours. The source of the smell, whether bacteria, mold or decaying organic matter, is still there.
• Painting over the stains. If walls are still damp and mold is still alive, new paint will blister and black spots will reappear within weeks. You pay twice for the same wall.

There is also the question of timing. Mold can begin to colonise wet materials within roughly 24 to 48 hours, and in Bangkok's heat and humidity it does not wait politely while a family works through the house one room at a time. Every day that walls stay damp and untreated, colonies spread further into plaster, timber door frames and the backs of built-in cabinets. A cleanup that drags on for weeks without proper disinfection often ends with more material having to be removed than if the house had been treated promptly once the mud was out.

Finally, watch your own health in the two weeks after the cleanup. Keep an eye on fevers, persistent coughs, skin rashes and stomach problems among everyone who worked in the house, and see a doctor early rather than late.

Germs and mold spores keep hiding in the air, in the gaps behind wardrobes, under staircases and in joints a mop simply cannot reach. That is why the step after mud removal should be a systematic, whole-house disinfection, not another round of scrubbing.

Hand Over to WHD: Chemgene HLD4H Disinfection Fogging and Ozone Shock Treatment

World Health Disinfection (WHD) offers two complementary services for flood-hit homes:

1. Disinfection fogging service. Our team applies CHEMGENE HLD4H disinfectant as an ultra-low-volume (ULV) fine mist. The tiny droplets drift into corners, under furniture and onto surfaces that hands and mops never reach, covering floors, walls, skirting, doors, stair rails and bathrooms in a single, consistent pass.

2. Ozone treatment service. We run high-output ozone generators in a sealed, empty space. Ozone is a strong oxidiser. At treatment concentrations it helps destroy mold spores in the air and on surfaces and breaks down odour molecules, including the sewer smell, mud smell and musty odour that soak into curtains, wood and plaster.

How the service works, step by step

1. Site survey. We check how high the water rose, what the walls are made of, how damp they still are, and where mold is already visible.
2. Cleanup and removal advice. We tell you which areas need another wash, which items are not worth saving, and which gypsum or board sections should be cut out rather than treated.
3. ULV disinfection fogging. Every room is fogged, with extra attention to areas that sat under water and to high-touch surfaces.
4. Ozone shock treatment. Rooms are closed and the generator runs for a period suited to the volume and odour level. Sensitive electronics, artworks and rubber items are covered or removed first, and the ozone dose is controlled for the space.
5. Ventilation. Doors and windows are opened so the ozone can break down to safe levels before anyone goes back inside.
6. Re-check. We walk through again to check odours and risk points and give you advice on keeping humidity under control in the weeks that follow.

Ozone safety: during ozone treatment there must be no people, pets or plants inside the treated area. The space must be ventilated until the ozone smell has faded before anyone re-enters. Our team manages this timing for you.

10 Reasons to Do the Mud Safely Yourself and Let WHD Finish the Disinfection

1. Your family spends less time in contaminated rooms, because the whole-house disinfection is handled by a fully equipped team.
2. ULV disinfection fogging reaches the gaps and corners that wiping cannot.
3. We use CHEMGENE HLD4H, the disinfectant WHD relies on in real service work, instead of home-mixed solutions in guessed ratios.
4. Ozone treatment tackles the mud smell and musty odours trapped in walls and fabrics.
5. Fewer airborne mold spores means a more comfortable return home for anyone with allergies or asthma.
6. You get honest advice about what to keep and what to throw away, so you do not pay to repair items that cannot be saved.
7. Electronics are covered or moved before treatment, and the ozone dose is controlled for the size of the space.
8. The work follows a clear process, from survey through to a final re-check.
9. Walls are left ready for repair and repainting at the right moment, so you do not have to repaint again when mold returns.
10. We are easy to reach by phone and LINE, including follow-up questions about topics such as residential ozone disinfection.

Customer Voice

"The first time, I cleaned the mud with no protection at all and ended up sick. When the WHD team came to survey, they told us to wear boots and gloves, wash out the wet mud first, and then they would fog and ozone the whole house in one visit. Afterwards the sewer smell was much weaker, and my daughter could sleep downstairs again."

— Khun Weera, townhouse owner off Pracha Uthit Road, Thung Khru (a story from the field)

Frequently Asked Questions

Q: How clean does the house need to be before I book disinfection?
A: Shovel out the thick mud and rinse floors until you can see the surface material. It does not need to be perfect. Our team will assess the site and point out anything that needs another wash.

Q: Can I use a cloth mask instead of an N95?
A: A cloth mask stops some coarse dust but very few mold spores. If you are working near moldy walls or sweeping dry mud, use an N95 respirator or equivalent.

Q: I already waded through water with a cut on my foot. What should I do?
A: Wash the wound with clean water and soap and watch for symptoms. If you develop fever, headache or calf pain after flood exposure, see a doctor immediately and mention that you were in floodwater.

Q: How long do we need to stay out during ozone treatment?
A: It depends on the size of the space and how strong the odours are. We tell you the timing before we start. No people, pets or plants may be inside during treatment, and the space is ventilated before re-entry.

Q: Do we need to move the TV, fridge and computer?
A: We cover sensitive electronics or ask you to move them out beforehand, and we control the ozone dose to suit the space.

Q: Do you serve Thung Khru, Bang Mot and Phutthabucha?
A: Call 065-556-6294 or add LINE @whd268 to check availability and book a site survey.

Q: Should I disinfect before or after the walls are repaired?
A: Disinfect after the mud is gone and before any repainting or new boards go up. Treating first means you are not sealing contamination behind fresh materials.

Mud Gone? Let the Professionals Finish the Disinfection

The WHD team is ready to survey and plan the recovery of homes in Thung Khru and nearby areas.

See Our Disinfection Service – Click Here

Book Ozone Treatment – Click Here

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

Related Services and Reading

• Residential ozone disinfection
• Ozone treatment for odours and chemical residue
• Mosquito spraying after the water recedes
• All articles
• External sources: WHO fact sheet: Floods and Department of Disease Control, Thailand