A Story from the Field: The Market Opens on Saturday, but the Restrooms Are Not Ready

Khun Pranee works in the public health and environment section of a municipality in U Thong District, Suphan Buri. Her responsibilities include the public restrooms in the municipal park, the outdoor exercise area, the children's playground and the community market that opens every Wednesday evening and Saturday morning. On market days dozens of vendors set up stalls, and the lanes fill with families buying vegetables, grilled snacks, sweets and household goods.

During the 2026 floods, water from local waterways and the surrounding fields spread into the park and the market ground and stayed for several days. The restroom block stood in almost knee-deep water, and the septic tank and drains backed up. When the water receded, it left thick mud on the market ground, debris tangled in the fences, wooden benches stained black, and restrooms that smelled so strongly that the cleaning staff wore two masks at once.

The municipal team hosed down the market ground and scrubbed the restrooms several times, but a musty, sewer-like smell still drifted out of the restroom block. Lines of mold appeared along the lower walls and on the ceiling. Several vendors phoned to ask, "When can the market open? Is it safe yet?" Some parents stopped bringing their children to the playground because they were worried about germs from the floodwater.

"People aren't only asking whether we've cleaned," Khun Pranee says. "They're asking how sure we are. We need a process we can explain." Similar situations can arise in public spaces across U Thong District, in subdistricts such as U Thong, Chorakhe Sam Phan, Sa Yai Som, Ban Khong and Don Kha, and in areas managed by subdistrict administrative organizations elsewhere in Suphan Buri. This guide is written for officials like Khun Pranee: it explains why public spaces need a structured recovery, which methods suit which kind of space, and how World Health Disinfection (WHD) can support the work from survey to final report.

Note: this story is an illustrative scenario based on the kind of work commonly found after floods. It does not refer to any specific person or organization.

Why Public Spaces Become Community Risk Points After a Flood

1. Many people share the same surfaces

Public restrooms, benches, handrails, playground equipment and market stalls are touched by large numbers of people every day. If these surfaces remain contaminated after a flood, germs can spread faster and further than they would in a private home. A single contaminated tap in a market restroom may be touched by hundreds of hands in one morning.

2. Health risks worth communicating to the public

• Leptospirosis: the bacteria may be present in mud and puddles in parks and market grounds. People walking barefoot or with cuts are at risk. A high fever, headache or calf pain after contact with floodwater is a reason to see a doctor.
• Diarrhea and food poisoning: markets selling ready-to-eat food must watch for bacteria such as E. coli on stall tables and utensils.
• Skin infections: children playing in playgrounds with leftover mud are at risk of rashes and infections.
• Allergies and asthma: mold in restroom buildings and equipment stores triggers symptoms in sensitive people.
• Mosquitoes and dengue: puddles in parks become mosquito breeding sites within days.

3. Public and vendor confidence

A community market is an important source of income for small vendors. If it reopens late, or reopens but nobody comes, many families lose their earnings. On the other hand, reopening too early without proper restoration, and then seeing people fall ill, would damage trust in the local authority.

4. Workload for local staff

After a flood, local officials must look after many areas at once: roads, drains, evacuation centers and public spaces. A service provider who helps plan and carry out disinfection systematically reduces the burden and helps the work finish on schedule.

Common Approaches That Are Not Enough on Their Own

• High-pressure washing alone: it removes mud, but the spray can spread contamination as aerosol, and it does not disinfect surfaces.
• Pouring concentrated bleach in restrooms: the harsh smell stings users' eyes and noses and does not solve the musty odor embedded in ceilings and walls.
• Spreading lime powder across the grounds: it may help in specific spots, but lime dust irritates skin and airways, especially where children play.
• Perfume and deodorizer blocks in restrooms: they mask the smell briefly, and people still notice mustiness mixed with fragrance.
• Repainting the restroom building straight away: if the walls are still damp, the paint will peel and mold will return, wasting the budget.

What Happens Inside a Flooded Public Restroom Block

Public restroom buildings in parks and markets are usually small, solid structures with limited ventilation, often a single extract fan or a row of high vents. When floodwater fills the building, it soaks into the lower part of the walls, the base of partitions and the wooden or particle-board doors of each cubicle. At the same time, sewage from backed-up drains and septic tanks mixes with the floodwater, leaving a film of contaminated silt on every surface once the level drops.

In the days that follow, three problems develop together. Bacteria survive in the silt and in grout lines that never fully dry. Mold grows on damp ceilings, walls and doors, releasing spores and a musty smell. And disturbed plumbing, such as dried-out traps, cracked pipes or a septic tank that is still overloaded, keeps sending sewer gases back into the room. Scrubbing the floor deals with only part of this. That is why a combination of repairs, cleaning, disinfection, ozone treatment and ventilation is needed to bring a restroom block back to a standard the public will accept.

Special Care for the Food Section of the Market

The parts of a community market where cooked food, desserts, fruit and drinks are sold need extra attention, because anything that contaminates a surface there can end up in someone's mouth. Before reopening, food stall areas should be scraped free of mud, washed with detergent and clean water, disinfected and allowed to dry. Shared sinks or water points used by vendors should be checked to confirm that the water supply is safe and that drainage is working.

Encourage food vendors to bring clean containers, cover food on display, keep raw and cooked items apart and wash their hands frequently. Where possible, the authority can provide a hand-washing station with soap at the entrance to the food section. These simple steps, combined with professional disinfection of the shared surfaces, give shoppers good reason to return.

Keeping Children Safe in the Playground

Children touch everything, put their hands in their mouths and sit on the ground, so playgrounds deserve careful treatment. Remove mud from under slides, swings and climbing frames, rake or replace contaminated sand, and wash the equipment before it is disinfected. Check for damage that the flood may have caused, such as loosened bolts, exposed sharp edges or undermined foundations, and repair it before reopening.

After disinfection, follow the team's advice on how long to wait before children use the equipment again. A small sign at the entrance explaining that the playground has been cleaned and disinfected, with the date, reassures parents. Remind families to wash children's hands after playing, especially before eating.

The Solution: A Public-Space Disinfection Plan by WHD

World Health Disinfection (WHD) provides disinfection fogging with Chemgene HLD4H using ultra-low-volume (ULV) foggers, and ozone treatment for enclosed buildings, planned according to the nature of each space.

Matching the method to the space

• Public restroom buildings: floors, walls, toilets, washbasins and ceilings are fogged with disinfectant, then the building is sealed for ozone treatment to break down musty and sewer odors and airborne mold spores.
• Market grounds and stall tables: surfaces are fogged after mud has been washed away, focusing on areas that touch food and shoppers' hands. Open-air areas are not treated with ozone, because ozone works in enclosed spaces.
• Parks and playgrounds: benches, handrails, play equipment and rest pavilions are fogged once mud has been cleaned off.
• Equipment stores and market offices: closed rooms with musty odors receive both fogging and ozone treatment.

Step-by-step process

1. Joint survey with officials: the team walks every site with local staff, noting flood levels, mold spots and priorities, such as restrooms and market grounds that must open first.
2. Clean-up guidance: remove mud and debris, wash surfaces, and have the authority's technicians repair problem pipes or septic tanks.
3. ULV disinfection fogging: Chemgene HLD4H is fogged in restroom buildings, market grounds, stalls, benches, play equipment and equipment stores.
4. Ozone shock in enclosed buildings: restroom blocks and store rooms are sealed and treated with no people, pets or plants inside, with the area cordoned off and warning signs posted.
5. Ventilation: doors and windows are opened until the ozone smell has faded, before reopening to the public.
6. Re-check and work summary: odor and mold are checked again, and a summary of areas treated and dates is provided for reporting and public communication.

Ozone safety: ozone is used only in buildings that can be sealed. During treatment there must be no people, pets or plants in the area. The team cordons off the space and posts signs, and the building must be ventilated adequately before reopening. Electrical equipment such as hand dryers and delicate rubber parts are covered, and the ozone dose is controlled according to room size.

10 Reasons Local Authorities Choose WHD

1. Plans matched to each space: fogging outdoors, ozone only in enclosed buildings.
2. We use Chemgene HLD4H, without the harsh smell of chlorine, suitable for shared public spaces.
3. ULV mist reaches restroom corners, beneath stalls and into play equipment.
4. Ozone treatment breaks down musty and sewer odors in public restroom buildings.
5. Work is sequenced so markets and restrooms can reopen on schedule.
6. A summary of areas and dates supports your internal reporting.
7. Safety first, with clear cordons and warning signs.
8. Add-on mosquito spraying for parks and market grounds.
9. Practical advice on maintaining public restrooms after restoration.
10. Quotations and enquiries by phone, LINE or email.

Before and After Restoring Public Spaces

Customer Voice

"The team walked every site with us and arranged the work so the restrooms and market ground were done before Saturday. After the ozone treatment the restrooms smelled far better. We announced the steps to residents, and the vendors all came back to set up their stalls."
- Khun Pranee, public health and environment officer in U Thong (a character from an illustrative scenario)

Communicating with Residents and Vendors

Public confidence grows from clear information. Use the village loudspeaker, the authority's social media page or the market's LINE group to explain which areas have been cleaned, disinfected and treated with ozone, when this happened, and which areas are still in progress. Post clear signs at restroom buildings during ozone treatment, such as "No entry: disinfection in progress." Remind residents to wash their hands, wear shoes in areas that still have mud, and see a doctor if they feel unwell after contact with floodwater.

For vendors, recommend washing and disinfecting their own tables, containers and equipment before setting up, discarding any stock or ingredients that touched floodwater, and providing hand-washing points for shoppers. More food hygiene guidance is available from the Department of Health.

Maintenance Checklist for Public Restrooms and Markets

• Set restroom cleaning rounds and post a log sheet by the door.
• Disinfect high-touch points such as taps, door handles, handrails and flush buttons.
• Inspect septic tanks and drains regularly; top up floor drains with water to prevent sewer smells.
• Clean the market ground after every market day; never leave food waste overnight.
• Turn over containers and remove standing water in the park to cut mosquito breeding.
• Inspect restroom ceilings and walls weekly while the rain continues.

Setting priorities

When there are many sites but limited time and budget, start with the places the public uses most and where the risk is highest: public restrooms, food sections of the market and the children's playground. Then move on to rest pavilions, exercise areas and equipment stores. A clear order of priorities allows you to announce reopening dates for each area with confidence.

Planning, Procurement and Reporting

Local authorities work within procedures, and a good service provider should make those procedures easier rather than harder. After the joint survey, WHD can provide a written scope of work describing each site, the method to be used (fogging, ozone treatment or both), the sequence and the estimated time needed. This helps officials compare options, prepare internal approvals and follow their own procurement rules.

Once the work is complete, a simple summary listing the areas treated, the dates and the methods used gives the authority a record for internal reporting and for answering questions from residents or councillors. It also provides a baseline if further work is needed later in the rainy season, and it gives the authority a clear answer when a resident asks what was done to make the park and market safe again.

We do not quote prices in articles, because every site is different. Please contact the team with the locations and approximate sizes of the areas you need treated, and a survey can be arranged.

Working Alongside Other Agencies and Volunteers

After a flood, many groups want to help: health volunteers, school groups, temple committees, local businesses and other government units. Coordination ensures that their effort adds up. A practical sequence is for volunteers and municipal crews to handle mud removal, debris clearing and initial washing, while specialist disinfection and ozone treatment follow once the surfaces are clean and reasonably dry. Fogging over thick mud wastes disinfectant and gives poor results, so timing matters.

Make sure volunteers have boots, gloves and masks, know not to enter buildings marked for ozone treatment, and understand basic hygiene such as washing hands before eating. Public health volunteers are also well placed to share health messages with households, including the warning signs of leptospirosis and dengue.

Preparing for the Next Flood Season

Recovery is also a chance to reduce damage next time. When restroom buildings are repaired, consider moisture-resistant finishes on lower walls, raised electrical sockets and hand dryers, and better ventilation fans. Check that septic systems have working backflow protection where appropriate. In the market, plastic or stainless-steel stall tables are easier to disinfect than wood. In the park, improving drainage around play areas reduces standing water and mosquito problems.

Keep the records from this year's recovery: which areas flooded, how deep, what was damaged and what worked. That information makes the next response faster and helps justify preventive investment.

Frequently Asked Questions

Q: Can ozone treatment be used in an open-air market?
A: We do not recommend it. Ozone works in enclosed spaces. Open-air market grounds are treated with disinfection fogging after mud has been washed off, while ozone is used for restroom buildings, store rooms and market offices.

Q: When can vendors set up again after fogging?
A: The team will advise on timing based on the product label and site conditions. Food vendors should wipe their stall tables with clean water before placing food on them.

Q: Can the public use the restrooms during ozone treatment?
A: No. The building must be closed and cordoned off until ventilation is complete. The authority may provide temporary toilets or treat one building at a time.

Q: How can an authority request a quotation?
A: Contact the team by phone, LINE or email with the locations and scope of work. The team will arrange a survey and prepare a quotation in line with the authority's procedures.

Q: Can plastic and metal playground equipment be disinfected?
A: Yes. Once mud has been washed off, the team fogs the equipment and advises how long to wait before reopening it to children.

Q: Do you also handle mosquito control in parks?
A: Yes, our mosquito spraying service can be scheduled alongside disinfection, together with advice on removing standing water.

Q: Should we disinfect the market ground before every market day from now on?
A: Not necessarily. Once the post-flood restoration is complete, routine cleaning after each market day is usually enough, with spot disinfection of high-touch and food-contact surfaces. A further professional treatment can be considered if the area floods again or if odor and mold return.

Q: Our restroom block has wooden cubicle doors that soaked. Should they be replaced?
A: Wooden or particle-board doors that swelled, delaminated or show deep mold are best replaced, ideally with moisture-resistant materials. Disinfection and ozone treatment help the rest of the building, but they cannot restore materials that have physically broken down.

Q: Do you serve U Thong and other districts of Suphan Buri?
A: Please call 065-556-6294 or message LINE @whd268 to check the service area and book a survey.

Give Your Community Safe Public Spaces Again

Talk to WHD about disinfection fogging and ozone treatment for public restrooms, markets and parks.

View Disinfection Service - Click Here

Book Ozone Treatment - Click Here

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

Related Links

• Mosquito spraying service
• Ozone treatment for odors and chemical residue
• Chemgene HLD4H 750ml spray
• All articles

Health references: World Health Organization (WHO): Floods · Department of Disease Control, Thailand