A typical scenario (an illustrative situation to help you picture the problem, not a review or the medical history of any real person)

Three days of shovelling mud, and one pair of boots that had been on five people's feet

Ot, a 29-year-old office worker, took three days' leave to volunteer cleaning homes in a community in eastern Bangkok once the water began to fall in late September 2026. His group of eight met at a temple pavilion that had become a donation centre. In one corner lay a heap of donated rubber boots, along with shovels, hoes, buckets, squeegees, a cement wheelbarrow and rubber gloves that anyone passing picked up and used.

On day one they waded through mud halfway up their shins, house by house: shovelling it into buckets, wheeling it to the mouth of the soi, hosing floors and dragging out ruined furniture. At dusk everyone pulled off their boots and left them in a pile outside the pavilion, some still holding muddy water. The next morning people grabbed whichever pair fitted. Ot stuffed his muddy clothes into a bag and threw it in the back of his car. At home his four-year-old daughter ran to hug his legs while his trousers were still damp, and the clothes went into the washing machine with the rest of the family's laundry.

On day three a friend stepped on a nail hidden in the mud that went straight through his sole. Two days later the wound on his foot was red, swollen and throbbing. Another volunteer developed a fever and calf pain after going home. Both went to a doctor, who asked carefully about their time wading through floodwater. Ot himself had an itchy, peeling rash between his toes, and the boots he brought home smelled so bad they had to stay outside.

No one in the group did anything wrong on purpose; they came because they wanted to help. What was missing was a routine for the gear. Boots, shovels, gloves and clothing that spend all day in floodwater are perfect vehicles for carrying germs from one house to the next, from one person to another, and from the flood zone back into volunteers' own homes. This article explains what rides along on that gear, who is at risk, why a quick rinse is not enough, and how to set up a gear-wash station with the medical-grade disinfectant Chemgene HLD4H.

When a whole city picks up a shovel

According to news reports, around 300 mm of rain fell in about 48 hours between 24 and 27 September 2026, flooding wide areas of Bangkok. On 26 September the Bangkok Metropolitan Administration declared all 50 districts a disaster zone. Eastern Bangkok was hit hardest, with Khlong Chan and Bueng Kum mentioned in coverage. Governor Chadchart said the canals were full and drainage would take two to three days after the rain stopped. As of 30 September, roads such as Si Burapha and Lat Phrao still had 20 to 40 cm of standing water.

Thai media compared the event with the great flood of 2011. One Thai business report cited a Chamber of Commerce estimate of about 12,300 million baht in damage, and news reports recorded three deaths. Our condolences go to every family who lost someone.

As the water recedes, an enormous amount of mud removal and house washing follows: homeowners, relatives, neighbours, volunteer groups, students and company teams all pitch in. Large numbers of people are in contact with mud and floodwater for long stretches over several days, using shared and rotated equipment. That is where proper gear care becomes a health issue for the whole community.

What travels on boots, shovels and muddy clothing

Urban floodwater is not clean rainwater. It mixes with sewer overflow, septic tank contents, rubbish, animal carcasses and the waste of rats and other animals. When the water drops, all of this settles into the mud and clings to whatever touches it: boot rubber, shovel handles, bucket walls and fabric.

Leptospira, the cause of leptospirosis

Leptospirosis, known in Thai as "rat-urine disease", is caused by bacteria in the urine of rats and other animals. The bacteria survive in standing water and wet soil and enter the body through cuts, scrapes, the eyes, nose and mouth, and skin softened by long soaking. Common symptoms are a sudden high fever, headache, muscle pain especially in the calves, and red eyes. Thailand's Department of Disease Control urges anyone who has waded through water or mud and develops these symptoms to see a doctor promptly and mention the wading, because delayed treatment can lead to serious illness.

Sewage bacteria and wound infections

Sewage-laden mud carries many kinds of bacteria. When they enter a wound from a nail, broken glass or sheet metal hidden under the mud, the wound can become inflamed, swollen, red and pus-filled, and the infection can spread. Deep puncture wounds also carry a risk of tetanus, so a doctor should assess whether a booster shot is needed.

Foot fungus and "water-bitten" feet

Feet sealed inside wet boots all day with sweat create the perfect conditions for skin fungi. Signs include itching, flaking skin, soggy white skin between the toes and foot odour. When boots are passed from person to person, fungus from one foot travels to the next. Softened, cracked skin also gives bacteria and Leptospira an easier way in.

Gut germs

Peeling off a muddy glove to grab a boxed lunch or water bottle is the most direct path for faecal germs from sewage to reach the mouth. Diarrhoea and vomiting among volunteers are a familiar sequel to house-cleaning days.

Who is most at risk

• Volunteers with cuts on hands or feet, since even a small wound is an entry point.
• People with diabetes, whose foot wounds heal slowly and infect easily.
• People with weakened immunity and older adults, whether helping or cleaning their own homes.
• Pregnant women, who should not wade or work in mud themselves.
• Children and family members of volunteers, who may be exposed through clothes, boots and tools brought home uncleaned.

Anyone who develops fever, calf pain, red eyes, a red swollen or pus-filled wound, or severe diarrhoea after flood work must see a doctor and say they waded through water or mud. An equipment disinfectant is not a treatment and does not replace wound care or medical care.

The impact when volunteer gear is neglected

Health

Infected wounds, foot fungus and leptospirosis risk turn would-be helpers into patients. Some lose more days off work; some may need hospital care.

Money and resources

Boots so smelly and fungal nobody will wear them, gloves torn from reuse without washing, shovels and wheelbarrows stored muddy until they rust or crust over: all of this burns through limited donations faster, forcing volunteer centres to keep buying replacements.

Time and manpower

As team members fall ill one by one, capacity drops just when many homes are still waiting. Community recovery slows even though everyone is willing.

Reputation and trust

For volunteer groups, foundations, companies running CSR days or communities acting as rally points, news that several volunteers fell ill can dent the confidence of donors and would-be helpers.

Family

Muddy clothes in the family washing machine, boots left inside the house and shovels in the car boot are how germs reach volunteers' small children and elderly parents, people who never waded through any water.

Why common gear-care habits are not enough

1. Hosing only the outside of boots

Hosing knocks mud off but does not disinfect, and most people only rinse the outside. The inside, which touches the foot directly, stays damp with sweat and muddy water that ran in. Tread grooves remain packed with mud that plain water cannot shift.

2. Piling wet boots together

Boots heaped overnight in a stuffy corner never dry inside. Fungi and bacteria keep growing, and the next morning someone new slides their feet into that dampness.

3. Reusing gloves without washing and removing them wrongly

Pulling off rubber gloves finger by finger with a bare hand puts your skin straight onto the muddy outside. Single-use gloves that get reused often have tiny holes you cannot see.

4. Washing mud clothes with the family laundry

A short cold wash may not remove all the mud and germs from the fabric, and it contaminates everything else in the load.

5. Spraying alcohol on muddy tools

Alcohol evaporates quickly and works poorly on surfaces covered in mud or organic matter. Spraying it on a muddy shovel handle feels safer than it actually is.

6. Soaking gear in strong bleach

Over-strong bleach can harden, crack and degrade rubber, corrode some metals, blotch clothing and fill a crowded work area with fumes. It is also dangerous if mixed with toilet cleaners or other chemicals people bring to a shared washing point.

Chemgene HLD4H and the volunteer gear-wash station

Chemgene HLD4H is a medical-grade high-level disinfectant made in England. According to the product information, it is listed against bacteria, fungi, mycobacteria, Salmonella and many viruses including norovirus, influenza H1N1, RSV, hand-foot-and-mouth virus and SARS-CoV-2. It is stated to kill within one minute and to provide residual surface protection for up to 14 days.

What makes Chemgene a good fit for volunteer gear is that the product information states it is non-corrosive to rubber, plastic, stainless steel, aluminium and fibreglass, matching rubber boots, plastic buckets, rubber squeegees, stainless shovel blades, wheelbarrows with metal parts and rubber tyres, and PVC raincoats and waders. It can be diluted at 1:30, 1:50, 1:60, 1:100 and up to 1:200, is biodegradable, and is stated to be safe for people and animals when used as directed. Tests and approvals listed include Mahidol University, NHS England, ISO 9001:2015, ISO 13485, SGS, Intertek, CE and EN 13727 / 14348 / 13624 / 14476.

Important: Chemgene is for surfaces and equipment. It is not a wound antiseptic or a skin product, so never spray it on wounds or your body. Clean hands with soap and water, and treat wounds according to medical advice.

Set up a three-step wash station at the exit of the work zone

1. Step one: scrape and hose off mud. Use a stiff brush and hose to clear mud from boots, treads, shovel blades and wheelbarrow tyres. Make sure runoff goes into the drain, not back into a house just cleaned.
2. Step two: wash with detergent. Scrub in a bucket of detergent solution, then rinse with clean water. Disinfectants work best on surfaces that are already clean.
3. Step three: disinfect with Chemgene. Fill a pump sprayer or spray bottle with Chemgene diluted per the label and clearly marked. Spray all washed surfaces, leave for the label contact time, then set items on a rack or rail to dry.

How to care for each type of gear

• Rubber boots. Wash the outside and soles, tip out any water inside, wipe or spray Chemgene inside and out, leave for the contact time, then hang upside down on a rail in moving air. Ideally give each person two pairs to alternate so one can dry fully. If boots must be shared, disinfect the inside before every handover and have everyone wear their own socks.
• Shovels, hoes, rakes and squeegees. Scrape mud from blades and handle joints, wash, disinfect with extra attention to handles, and stand them up to dry before storage.
• Buckets and wheelbarrows. Wash inside and out, including handles and wheels, disinfect, and turn buckets upside down to dry.
• Reusable rubber gloves. Wash them while still wearing them, disinfect the outside, peel them off inside-out without bare skin touching the outside, and hang to dry. Throw away single-use gloves every time.
• Raincoats, waders and PVC aprons. Hose off mud, wash with detergent, disinfect with Chemgene per the label and hang to dry.
• Clothes worn in the mud. Change before getting into a vehicle or going home. Bag them separately, wash apart from the family's laundry with detergent in the warmest water the fabric allows, and dry fully in the sun. Then disinfect the basket or bag used to carry them.

Read the label and safety data sheet before use, wear gloves when mixing and spraying, work in a ventilated area, never mix with bleach or other chemicals, and store the product away from children who may be playing around the volunteer centre.

10 reasons volunteer centres and mud-clearing households should disinfect gear with Chemgene

1. Compatible with mud gear materials. Stated non-corrosive to rubber, plastic, stainless steel, aluminium and fibreglass, helping boots and tools last longer.
2. Broad coverage. Listed against bacteria, fungi and viruses, matching the varied contamination in flood mud.
3. Fast action. A stated one-minute kill time lets a wash station handle many volunteers at the end of a shift when the label contact time is followed.
4. Helps tackle boot fungus. Fungi are among its targets, and it is tested to EN 13624 for fungicidal activity.
5. Residual protection. Stated surface protection for up to 14 days helps with gear that is picked up and used every day.
6. Economical at community scale. Dilutions up to 1:200 for suitable tasks per the label mean one container of concentrate goes a long way. See pack options on the Chemgene HLD4H product page.
7. Biodegradable. Suitable for outdoor wash points draining into community sewers.
8. Stated safe for people and animals when used as directed, a plus at centres with elders, children and community dogs around.
9. Verifiable testing and certification from Mahidol University, NHS England, SGS, Intertek and ISO 13485 for medical devices.
10. Useful at home once the volunteering is over. Keep using it on household surfaces, bathrooms and high-touch points all year. Order Chemgene here.

Example case: a Si Burapha community volunteer base with a wash station outside the pavilion

Example case (an illustrative scenario, not a real customer review)

Daeng, chair of a community in a soi off Si Burapha Road, turned the community pavilion into a volunteer base after the water went down. In the first days the base had about thirty pairs of donated boots plus a stock of shovels and buckets. After three days, volunteers complained of smelly boots and itchy feet, half the gloves had disappeared, and someone had cut a foot on hidden debris.

Daeng reorganised the front of the pavilion into a mud-scraping point, a detergent wash point and a Chemgene disinfection point using a clearly labelled pump sprayer diluted per the label. Bamboo rails went up for hanging boots upside down, each pair got a name in waterproof marker, and a rule was set: everyone passes through the wash station before entering the pavilion to eat. A handwashing basin with soap and a changing corner with bags for dirty clothes completed the setup. Anyone with a wound was cleaned up by a volunteer nurse and advised to see a doctor about tetanus and any unusual symptoms.

"We did not want the people who came to help to go home sick," Daeng says in this example. "Once there was a clear wash station, everyone followed it easily, the boots stopped smelling, and our donations lasted longer." It is an approach many volunteer bases can adapt.

Checklist for volunteers and households clearing mud

Before you go

• Check hands and feet; cover any wounds with waterproof dressings or avoid direct mud work.
• Pack thick-soled boots, heavy rubber gloves, spare socks, a change of clothes and plastic bags for dirty clothing.
• Bring clean drinking water and soap for handwashing.
• People with diabetes, weakened immunity, or who are pregnant should take tasks that do not involve wading.

While working

• Watch for sharp objects under the mud; probe with a tool before stepping where you cannot see the floor.
• Do not remove gloves to grab food or touch your face; wash hands with soap before every meal.
• If water gets into your boots, change socks and dry your feet when you can.
• Beware of submerged cables and sockets; never touch electrical equipment while wet.

At the end of each day

• Go through the three-step station: scrape mud, wash with detergent, disinfect with Chemgene per the label.
• Hang boots upside down and let tools dry before storing them.
• Change before getting in a vehicle, wash hands, arms and feet with soap, and shower as soon as you get home.
• Wash mud clothes separately from family laundry and disinfect the bag or basket used to carry them.
• Keep boots out of the house and away from small children.

Watch for symptoms over the next two to three weeks

• Fever, headache, calf pain or red eyes: see a doctor and mention wading.
• A wound that is red, hot, swollen or oozing, or any deep puncture wound: see a doctor.
• A foot rash that does not improve: ask a pharmacist or doctor.

FAQ: disinfecting boots, mud tools and volunteer clothing

1. Can I spray Chemgene on my hands or a wound?

No. Chemgene is a disinfectant for surfaces and equipment, not a skin or wound product. Wash hands with soap and clean water and have wounds cared for as medical staff advise.

2. How often should boots be disinfected?

Wash and disinfect them at the end of every working day and every time before passing them to someone else. Equally important is letting the inside dry fully before the next use.

3. Can I use it on leather boots or trainers?

The product information lists rubber, plastic, stainless steel, aluminium and fibreglass. Leather and fabric are not listed, so test on a hidden area first. That said, trainers or leather shoes soaked in floodwater are hard to clean inside and are not suited to mud work in the first place.

4. Do I have to throw away clothes worn in the mud?

Not usually. Wash them separately with detergent in the warmest water the fabric allows and dry them fully in the sun. If they are heavily soaked with sewage or too torn to clean, throwing them away may be safer.

5. Can Chemgene replace a tetanus shot or leptospirosis medication?

No. An equipment disinfectant only reduces germs on surfaces. Tetanus vaccination and any preventive or treatment medication for leptospirosis must be discussed with a doctor.

6. How much Chemgene does a volunteer centre need?

It depends on the number of volunteers, the amount of gear and the dilution the label specifies for the job. Volunteer centres and companies sending staff can contact WHD by phone or LINE to ask about pack sizes and quantity planning.

7. My boots still smell after washing. What now?

The smell usually comes from an inside that has not dried. Wash, disinfect and hang them upside down in moving air long enough; stuffing them with newspaper that you change often helps absorb moisture, and alternating two pairs helps more. For a large storage room with lingering odour, consider WHD's ozone disinfection service in the empty storeroom.

Help others at full strength when your gear is clean and safe

Set up a three-step station: wash first, then disinfect with a medical-grade product that is kind to rubber, plastic and metal. Volunteer centres and organisations can ask about bulk orders.

Order Chemgene HLD4H for Volunteer Gear

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

Related pages

• Chemgene HLD4H medical-grade disinfectant
• About Chemgene
• Professional disinfection service by WHD
• Test certificates
• Contact us

References

• 2026 Bangkok floods (Wikipedia)
• Al Jazeera: Disaster zone declared across Bangkok
• Department of Disease Control, Thailand (leptospirosis)
• CDC: Floods (cleanup worker safety)