A Vegetable Stall in an Old Riverside Market, and Water That Would Not Leave

A typical scenario, based on situations we see often (example case). Auntie Jit has sold vegetables and curry paste for over twenty years in an old riverside market in Mueang Chachoengsao district. The market is a timber-and-concrete building with narrow aisles, tightly packed stalls and noodle, dessert and old-style coffee shops under the same roof. Most years, when the water rises, she lifts her stock and waits two or three days for it to drop. Not this year.

Water sat in the market aisles for nearly two weeks. Some days it seemed to fall, then more rain or a high tide pushed it back up. Clear water turned murky green and smelly, and market rubbish collected around the pillars.

When it finally receded, vendors swept out the mud and hosed the aisles. But what Auntie Jit saw stopped her from laying out her vegetables. The planks under her stall were dark and soft to the touch, the pillars were coated in slippery slime, and a musty, sewage-like smell filled the building. Regular customers kept asking, "Has the market been disinfected?" She could not answer.

The same picture appears in roadside shophouses, sub-district schools, temple halls and offices across Chachoengsao where water stayed longer than usual.

Flooded Areas in Chachoengsao: All 11 Districts, According to Thai PBS and DDPM

According to Thai PBS, all 11 districts were affected and the Bang Pakong River was draining to the sea too slowly. According to DDPM on 2 October 2026, 47,959 households were affected. The cited reports do not break figures down by district or say whether water in each district was rising, falling or stable, so we show what was reported, plus each area's character for planning.

• Bang Nam Priao. Affected. Water-level status: not stated in the cited reports. Low-lying rice fields, fish ponds, canals and waterside communities.
• Phanom Sarakham. Affected. Status: not stated. A large trading town in the east of the province, with markets, shops and schools serving many sub-districts.
• Bang Khla. Affected. Status: not stated. A riverside community on the Bang Pakong with a market, riverside restaurants and old houses.
• Tha Takiap. Affected. Status: not stated. Farmland and scattered villages where schools and temples are community centres.
• Sanam Chai Khet. Affected. Status: not stated. A wide district of fields, orchards and villages; travel between sub-districts takes time, so combine several sites in one visit.
• Plaeng Yao. Affected. Status: not stated. Communities, housing estates and farmland.
• Mueang Chachoengsao. Affected. Status: not stated. The centre for government offices, markets, shophouses, schools, hospitals and an important temple visited by pilgrims from other provinces.
• Ban Pho. Affected. Status: not stated. Riverside communities, aquaculture ponds and businesses.
• Bang Pakong. Affected. Status: not stated. At the river mouth near the sea, with fishing communities, aquaculture, restaurants and industrial areas.
• Khlong Khuean. Affected. Status: not stated. A small riverside district of farming communities and village temples.
• Ratchasan. Affected. Status: not stated. Farming communities where the school and temple serve as classroom, merit hall and emergency gathering point.

When the Bang Pakong drains slowly to the sea, low-lying areas near the lower river may wait longer for water to recede, while others may dry out sooner. That is why people in Chachoengsao should not wait for the whole province to dry before starting. Plan cleaning and disinfection zone by zone as each area becomes ready.

Nationally, DDPM reported on 2 October 2026 that floods affected 31 provinces plus Bangkok: 1,245,581 households and 3,535,206 people, from heavy to very heavy rain plus northern runoff. Chachoengsao, next to Bangkok and its neighbouring provinces, is recovering alongside many other areas.

Long-Standing Water Makes Disinfection More Important Than After a Flash Flood

A flood that comes and goes in a day or two creates very different problems from water that stands for weeks. Chachoengsao's situation, with the Bang Pakong slow to drain, has some specific features:

• The water gets fouler every day. Still water with food scraps, rubbish and septic overflow builds up microbes, loses oxygen and starts to smell. Surfaces carry a heavier germ load once it recedes.
• Materials soak deeper. Wood, plaster, gypsum and the timber floors of old shophouses absorb water deep inside and release moisture for weeks, so mold regrows easily.
• Slime and biofilm. Surfaces left underwater for long periods develop a thin slimy layer that shelters microbes. It must be scrubbed off, or disinfectant cannot fully reach the germs.
• Water that comes back. In some places, water recedes and then returns. Spray only when you are confident it has really gone, or you may have to repeat the work.

For shared places such as fresh markets open every morning, schools with hundreds of pupils and temples hosting merit events, these problems mean risks that reach many people.

The Many Germs Floods Leave in Chachoengsao's Markets, Shophouses, Schools and Temples

Bacteria from Sewage and Food

• E. coli and other faecal bacteria arrive with overflowing septic tanks and drains. With long-standing water they spread across market floors, stalls, chopping boards and restaurant tables, causing diarrhoea, stomach pain and vomiting if swallowed via hands or food.
• Salmonella is associated with fresh foods such as meat, eggs and seafood. Flooded market stalls must be cleaned and disinfected before goods go back out.
• Leptospira (leptospirosis) comes from rat urine in standing water. Markets with food waste attract rats. Wear boots and gloves when cleaning, and see a doctor promptly with fever, headache or calf pain after wading. Spraying reduces germs on surfaces but is not a treatment.
• Wound-infecting bacteria. People who wade for days often get cuts on their feet and legs. Wash wounds with clean water and see a doctor if they become red, swollen or pus-filled.

Viruses Where People Gather

• Norovirus and rotavirus cause diarrhoea and vomiting and spread easily via hands, cutlery and surfaces, moving fast through schools, shelters and merit events.
• Hand, foot and mouth disease viruses and RSV are common in young children. Kindergartens and childcare centres the water reached must focus on toys and nap mats.
• Influenza spreads where people are close together, such as halls used as temporary shelters or meeting rooms where residents register for assistance.

Mold That Grows Deep After Long Soaking

• Mold on walls, timber floors, ceilings and furniture can start within 24 to 48 hours of materials getting wet, and after days of soaking it penetrates deep into wood and plaster. The CDC advises cleaning and drying as quickly as possible and removing materials that cannot be dried.
• Airborne spores cause coughing, sneezing, congestion and flare-ups of allergies and asthma. Older people in poorly ventilated old shophouses are often affected first.
• Musty and sewage smells signal moisture and active microbes. In a food market, they directly affect how customers feel.

Those most at risk are young children, pregnant women, older adults, people with diabetes or chronic illness, and anyone with open wounds from wading.

What Chachoengsao's Shared Places Risk by Reopening Without Disinfection

• Markets and restaurants: customers lose confidence and sales fall. One story of people getting sick after buying food damages the whole market, not one stall.
• Schools: clusters of sick pupils, teachers off work and parents unwilling to send children back, further delaying lessons already lost to the flood.
• Temples and shrines: older worshippers face mold-related breathing problems, and merit days or annual festivals have to be postponed.
• Shophouses and stores: mold regrows on goods and shelves, meaning more stock thrown away, more repainting and more closures.
• Offices and district halls: staff fall ill just when the public needs services most.

Why Usual Methods Fall Short When Water Has Stood for Weeks

• Hosing down and stopping there does not strip slime left by long-standing water, and kills nothing.
• Pouring bleach on market floors at the wrong strength fails against organic dirt or damages surfaces and bothers vendors with fumes. Never mix it with other cleaners.
• Waiting for things to dry naturally is very slow in shaded shophouses and indoor markets, and mold grows meanwhile.
• Lime powder or air freshener helps a little with smell but misses vertical surfaces such as walls, pillars and stalls.
• Painting over mold fails because deeply soaked walls keep releasing moisture.
• Wiping only what you can see cannot cover the hundreds of stalls, pillars, rails and corners in a market.

WHD's Disinfection Spraying for Chachoengsao: Zone by Zone as the Water Recedes

World Health Disinfection (WHD) provides disinfection spraying by trained technicians. According to the service information, the team uses standard spraying and ULV (Ultra Low Volume) fogging, a very fine mist. The disinfectant is CHEMGENE HLD4H, a medical-grade product from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride.

The Zone-by-Zone Approach

Because Chachoengsao's water does not recede everywhere at once, waiting for a whole building or community to dry can let mold spread in the parts that cleared first. A better approach:

1. Divide the site into zones, for example fresh food, cooked food, toilets and the market office; or classrooms, canteen and first-aid room at a school.
2. Remove mud, scrub off slime and dry the zones where water has gone first.
3. Book spraying only for zones that are ready, and block mud or water from unready areas flowing back.
4. Repeat for the next zone once it has receded and been cleaned.

The team can help plan the order of zones and the number of visits to suit each site.

How the Mist Reaches Surfaces After Cleaning

After scrubbing and wiping the main surfaces, ULV fogging creates very small droplets that drift through the space and settle evenly, including spots wiping misses: under market stalls, on timber pillars and low roof beams, on shophouse shelving, under school desks and in the corners of temple halls. Standard spraying is used where clear, direct contact matters, such as fresh-food floors, sinks and toilets.

Spraying works only after mud removal, slime scrubbing, washing and wiping. It is never sprayed over mud.

Disinfectant and Approvals, According to the Service Information

According to the service information, the disinfectant covers viruses, bacteria and fungi. The service page names organisms such as COVID-19, RSV, H1N1, H5N1 and hand, foot and mouth disease virus, claims 99.99% effectiveness, and lists approvals or endorsements from Thailand's Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019. WHD's customers, according to the service information, include hospitals, schools, shopping malls, airports, offices, airlines, banks and residential buildings.

The Service Steps

1. Book by calling 065-556-6294 or LINE @whd268 with your district, type of site, size and which zones have dried out.
2. Assess and zone. The team helps decide which zones go first and when to schedule the next round.
3. Prepare the area. Remove mud, scrub, wash, wipe and dry; store food, goods, utensils and personal items.
4. Technicians spray. Everyone not involved leaves the zone during application.
5. Wait about 30 minutes, according to the service information, then use the space normally, following the technicians' re-entry and ventilation advice.

Service Area Note

WHD is based in Bang Khae, Bangkok, and has no branch in Chachoengsao. Service in any of the 11 districts is planned in advance; the team confirms travel, coverage and timing by phone or LINE, and same-day arrival cannot be promised. Tax invoices are available, and according to the service information, the promotion includes a free CHEMGENE spray and WELLGIENIC wet tissues.

10 Reasons Chachoengsao Markets, Shops, Schools and Temples Choose Post-Flood Spraying

1. Made for long-standing water, which leaves more germs on surfaces, when done after slime has been scrubbed away.
2. Zone-by-zone scheduling, with no need to wait for an entire building or community to dry.
3. Mist reaches market and shophouse corners: under stalls, on pillars, beams and shelves that wiping misses.
4. Several germ groups covered: bacteria, viruses and fungi, as listed on the disinfection service page.
5. Medical-grade disinfectant from the UK, CHEMGENE HLD4H, with listed approvals you can check.
6. Back to trading quickly: according to the service information, you wait about 30 minutes before normal use.
7. Rebuilds customer trust: markets and restaurants can tell shoppers they have been cleaned and disinfected.
8. Suited to schools and childcare centres: it reduces germs on shared desks, chairs and items before children return, when the advised waiting time is followed.
9. Pairs with ozone for closed shophouse rooms where a musty smell lingers: see ozone disinfection.
10. Tax invoice and extras: according to the service information, a CHEMGENE spray and WELLGIENIC wet tissues for ongoing care of high-touch points. See details and book

Before and After: What Chachoengsao Markets and Shophouses Often See

Rotten timber, sagging ceilings and goods that sat in water should be removed or discarded. Spraying cannot restore damaged materials. Results depend on remaining moisture and ongoing care.

Example Case: A Sub-District School in Bang Nam Priao After Nearly Three Weeks Under Water

A typical scenario, based on situations we see often (example case). Director Arun runs a medium-sized school in Bang Nam Priao district surrounded by rice fields and fish ponds. When the water rose, the school field became a large pond and the ground floor of the classroom building stayed flooded for almost three weeks, because water on the low plain drained so slowly.

When it receded, teachers and the caretaker found the ground-floor classrooms coated in slippery slime, waist-high water marks and lines of black mold on the plaster walls, most of the library's lower shelves ruined, and a sewage smell in the canteen that feeds several hundred pupils. The upper floors were dry and usable, but everyone had to pass through the ground floor every day.

Director Arun contacted WHD on LINE. The team suggested two rounds. Round one would cover the canteen, toilets and main walkways, which dried first and which teachers and the community scrubbed and washed. Round two would cover the ground-floor classrooms on the field side, which were still damp and needed time to dry and the sagging ceilings removed.

On the first appointment, technicians sprayed the canteen floor, hand basins and toilets, then ULV-fogged the walkways and stairs while teachers and student volunteers waited outside. After the advised waiting time, the canteen reopened for upper-floor classes. A week later, the second round treated the ground-floor classrooms.

The school reopened partially sooner, without waiting for the whole building, and could tell parents clearly which areas had been cleaned and disinfected. This case illustrates the process; it is not an identified customer review.

Recovery Checklist for Chachoengsao Markets, Shops, Schools and Temples

Before Spraying

• Follow provincial and district announcements and wait until water has truly receded in the zone you will work on.
• Cut power to flooded areas until an electrician checks them.
• Wear boots, rubber gloves and a mask when clearing standing water and mud.
• Remove mud and rubbish, scrub slime from floors, pillars and stalls, then wash with water and detergent.
• Remove rotten timber, sagging ceilings, mattresses and goods that sat in water.
• Open doors and windows and use extractor fans if available, so surfaces are as dry as possible.
• Store food, goods, utensils, children's toys and important documents securely.
• Divide the site into zones and send photos for assessment.

During and After Spraying

• Everyone leaves the zone being sprayed, including children, older people and pets.
• Wait about 30 minutes per the service information and follow the technicians' advice.
• Rinse utensils, chopping boards and food-contact surfaces with clean water as usual before trading.
• Keep ventilating, because long-soaked walls release moisture for weeks.
• Wipe high-touch points daily, and remove standing water around the building to reduce mosquitoes.
• See a doctor right away with fever, calf pain, severe diarrhoea, red swollen wounds or breathing difficulty.

FAQ: Post-Flood Disinfection Spraying in Chachoengsao

Does WHD have a branch in Chachoengsao?

No. WHD is based in Bang Khae, Bangkok. For service in any of the 11 districts, call 065-556-6294 or LINE @whd268 to plan. The team confirms travel and timing; same-day arrival cannot be promised.

The water has not left the whole building. Can we start?

Yes, zone by zone, in areas where water has truly receded and cleaning is done. Block water or mud from unready areas flowing back, and expect another visit for the rest.

When can the market trade again after spraying?

According to the service information, wait about 30 minutes and then use the space normally. Follow the technicians' advice and rinse utensils and food-contact surfaces with clean water before putting goods out.

Must the slime be scrubbed off before spraying?

Yes. Slime from long-standing water shelters microbes and stops the disinfectant reaching the real surface.

Does spraying deal with mosquitoes after the flood?

This service disinfects surfaces; it is not mosquito control. To reduce mosquitoes, remove standing water in containers, tyres and puddles around buildings.

A shophouse still smells musty after spraying. What now?

Check for remaining moisture in walls or timber floors and keep ventilating. For closed rooms where the smell is in the air, consider ozone disinfection, done in an empty room with no people, pets or plants.

A family member got sick after wading. What should we do?

See a doctor immediately, especially with high fever, calf pain, red eyes or severe diarrhoea. Spraying reduces germs on surfaces; it does not treat illness.

Book Post-Flood Disinfection in Chachoengsao, Zone by Zone, Without Waiting for the Whole Province to Dry

Whether you look after a market in Mueang Chachoengsao, a riverside restaurant in Bang Khla, a shophouse in Phanom Sarakham, a school in Bang Nam Priao, Ratchasan or Tha Takiap, a temple in Khlong Khuean or Sanam Chai Khet, or a business in Ban Pho, Bang Pakong or Plaeng Yao, start with the zones where the water has gone. Scrub, wash and dry, then contact WHD to plan spraying in rounds that follow the water.

Book Post-Flood Disinfection in Chachoengsao

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

Related Links

• World Health Disinfection spraying service

• CHEMGENE HLD4H disinfectant

• Residential and building ozone disinfection

References

• Thai PBS: 2026 flood situation report

• Bangkok Biznews: DDPM flood summary, 2 October 2026

• Department of Disease Control, Ministry of Public Health

• CDC Floods: Clean Up Safely After a Flood

• WHO Fact Sheets