Example case: a typical scenario under the Pink Line

Nan, an accountant in her early thirties, rents a unit in an eight-storey condominium deep inside Ram Inthra Soi 23. She chose it because she can walk to the mouth of the soi and catch the train. Life was running smoothly until the night of 25 September 2026, when the rain simply would not stop. By the next morning the ground-floor car park had become a pool, several residents' motorbikes were half-submerged, the mouth of the soi looked like a canal that no saloon car dared to cross, and the curry-and-rice shop where she bought breakfast every day had closed its doors.

Three days later the water in the soi started to drop, but the building still smelled strange. A heavy stench drifted out of the ground-floor bin room the water had reached and hung around the lift lobby. The juristic office had the cleaners wash the car park and the lobby, yet the residents' LINE group would not stop complaining. Some parents said their children had started coughing, a few people reported diarrhoea after eating at a stall near the soi that had just reopened, and Nan caught herself wondering, every time she pressed the lift button, how many people had waded through floodwater and touched the same spot.

Scenes like this played out up and down Ram Inthra Road at the end of September 2026: in the condos and apartments that have sprung up along the rail line, small offices, shops in commercial buildings, fresh markets and houses in side lanes such as Soi 5, Soi 23 and Soi 24. This article sets out where the water stood according to news reports, which germs matter most in buildings where many people share the same space, and where post-flood disinfection spraying on Ram Inthra Road by World Health Disinfection (WHD) fits into the recovery.

Where Ram Inthra Flooded, According to News Reports and BMA Announcements

According to news reports, Bangkok received roughly 300 mm of rain in about 48 hours between 24 and 27 September 2026. The Bangkok Metropolitan Administration declared all 50 districts a disaster zone on 26 September 2026, and according to the Department of Disaster Prevention and Mitigation, around 329,000 Bangkok households had been affected as of 2 October 2026. Ram Inthra Road, which starts at Bang Khen Circle in Bang Khen district, appeared in several of those reports.

A Thai PBS report summarised road-surface water depths at 13:19 on 29 September 2026 and listed flood points in the same piece. The entries relevant to Ram Inthra were:

• Ram Inthra Road at Soi Ram Inthra 5: about 20 cm on the road.
• Ram Inthra Road from Bang Khen Circle to Lat Pla Khao station: listed as a flood point.
• Watcharaphon Road, Soi 8, in the nearby area: about 15 cm.
• Phahon Yothin Road from Bang Khen Circle to the 11th Infantry Regiment: listed as a flood point, with Phahon Yothin at Gate 2 of the 11th Infantry Regiment at about 20 cm. This road meets the head of Ram Inthra at Bang Khen Circle.

A Dailynews report on 29 September 2026 also described high water at Ram Inthra Soi 23 and Soi 24, both densely packed with homes, dormitories and condominium buildings.

Taken together, the flooded stretch at the start of Ram Inthra, from Bang Khen Circle to Lat Pla Khao station, is lined with condos along the rail line, markets, shops, restaurants and older residential lanes. That variety means the problems left behind differ from building to building.

Note: the depths quoted are road-surface levels at the time of reporting, not water levels inside buildings. The reports did not give a depth for Soi 23 or Soi 24, so this article does not give one either.

Why Shared Buildings on Ram Inthra Face a Higher Risk

The key difference between a detached house and a condo or office is how many people use the same space. In a single house, flood germs might affect four or five people. In a condominium with hundreds of units, everyone walks through the same car park, the same lift lobby and the same entrance door, and presses the same lift buttons. If one resident wades home through Ram Inthra Soi 23 and then touches a handrail or lift button, sewage-borne germs can reach dozens of other people within a single day.

Another factor is that the ground floor of mid-rise buildings in this area is usually given over to parking, bin rooms, pump rooms, electrical rooms and storage. These are enclosed, poorly ventilated spaces that rarely get a thorough clean. When water sits there, moisture lingers and musty smells rise up lift shafts and fire stairs. Offices in roadside commercial buildings often have carpet, fabric partitions and plywood furniture, all of which soak up water and make excellent breeding grounds for mould.

General guidance from the WHO and the CDC is to clean and dry out flooded spaces as quickly as possible, usually within 24 to 48 hours, to limit mould growth. In buildings where water stood for days and pumps had to be brought in, recovery often starts later than that, which makes a systematic clean finished with disinfection all the more important.

The Germs That Follow a Flood in Ram Inthra Condos, Offices and Markets

Norovirus and rotavirus: the enemy of common areas

In buildings where many people live together, norovirus is one of the biggest concerns because it spreads so easily through shared surfaces, causing sudden vomiting and diarrhoea. One person falls ill and within days several units can follow. Rotavirus is common in young children and can cause diarrhoea severe enough to lead to dehydration. The points to focus on are lift buttons inside and out, fire-stair handrails, glass entrance-door handles, key-card readers, parcel lockers and the juristic office counter.

E. coli and sewage bacteria

Water that floods car parks and ground-floor bin rooms is usually contaminated with sewage from drains and the building's own treatment tanks. E. coli and other faecal bacteria cling to concrete floors, walls, tyres and shoes. When residents head upstairs, the germs travel along corridor floors and onto doormats, causing diarrhoea, stomach cramps and nausea.

Leptospira (leptospirosis) around markets and bin areas

Ram Inthra has many fresh markets and food stalls, which feed a healthy rat population. When the water rises, rats climb to higher ground: bin rooms, under stairs and ground-floor storerooms. Rat urine in water and mud is the source of leptospirosis, which enters through cuts or skin softened by long soaking. Key symptoms are sudden high fever, headache, muscle pain especially in the calves, and red eyes. Anyone who waded through Ram Inthra Soi 5, Soi 23 or Soi 24 and develops these symptoms must see a doctor immediately and mention the flood exposure. Disinfection spraying reduces germs on surfaces but is not a treatment.

Salmonella in restaurants and office canteens

Restaurants along Ram Inthra, shops in commercial buildings and office canteens whose kitchens flooded need to watch for Salmonella, a cause of food poisoning, especially after fridges and freezers have been without power for hours. Ingredients that touched floodwater must be thrown away, and containers and prep surfaces need a proper wash before they are disinfected.

RSV, influenza and hand, foot and mouth disease

After a flood, many people are packed into small spaces: closed, air-conditioned condo units, offices where everyone returns at once, and trains that are more crowded because roads are impassable. Respiratory viruses such as RSV and influenza, including H1N1, spread easily in these conditions, and homes with young children need to watch for hand, foot and mouth disease. According to the WHD service information, the disinfectant used is listed as covering these, along with COVID-19 and H5N1.

Mould in closed rooms, car parks and carpeted offices

Ground-floor condo units left shut while owners stay elsewhere, storerooms off the car park and carpeted offices are where mould tends to appear first. Mould spores can trigger allergies, asthma, a persistent cough and eye irritation. People who work every day in an office with a musty smell may get headaches or a blocked nose without realising why.

Who is at risk along Ram Inthra

Beyond toddlers, older adults, pregnant women and people with chronic illness, this area has its own at-risk groups: building cleaners who handle floodwater and rubbish directly, security guards posted in car parks, market vendors, and office workers who wade from the mouth of their soi to the station every day.

What Happens When Common Areas Are Not Disinfected Properly

Residents' health: when germs sit on points everyone touches, illness spreads widely rather than staying in one household.

Costs for juristic persons and business owners: new carpet, mouldy wall repairs, repeated cleaning and, for offices, lost productivity when several staff are off sick at once.

Everyone's time: juristic teams field endless questions on LINE, office managers rearrange schedules, and shop owners keep pushing back their reopening date.

The building's image: a condo with a musty lift lobby after the flood can become a topic in online tenant groups, affecting rentals and resale prices. A shop where customers notice a bad smell may lose regulars.

Why Mopping Alone Is Not Enough for Buildings on Ram Inthra

Cleaners only reach what is visible: washing the car park and lobby floor is essential, but lower walls, pillars, door frames, pump rooms and bin rooms are often skipped because nobody sees them.

Wiping lift buttons with a damp cloth: a cloth used on point after point can carry germs from one place to the next unless it is used with a suitable disinfectant and changed often.

Strong bleach in enclosed spaces: under-building car parks and bin rooms have little airflow, so concentrated bleach can irritate workers' airways, and it must never be mixed with other cleaning products.

Running air conditioning to dry an office: air conditioning lowers humidity somewhat, but if carpets and partitions still harbour microbes, the system can circulate smells and spores across the whole floor.

No clear sequence: many buildings do everything at once, so areas that have just been disinfected are walked over again by shoes fresh from the mud.

WHD Post-Flood Disinfection Spraying for Ram Inthra and Bang Khen

World Health Disinfection (WHD) provides a disinfection spraying service for condominiums, apartments, offices, commercial buildings, shops, restaurants and homes. According to the service information, trained technicians spray and/or apply a ULV (Ultra Low Volume) fine mist. The very small droplets spread evenly across large spaces such as car parks and lobbies and reach vertical surfaces like walls and pillars better than wiping by hand.

The disinfectant is CHEMGENE HLD4H, a medical-grade disinfectant from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. The service information lists coverage of viruses, bacteria and fungi, including COVID-19, RSV, H1N1, H5N1 and hand, foot and mouth disease virus, with a stated efficacy of 99.99%.

The service page also lists approvals and references from the Department of Medical Sciences, Mahidol University, NHS England and the EN 14476:2013+A2:2019 standard, and names customers such as hospitals, schools, malls, airports, offices, airlines, banks and residential buildings, the same kinds of buildings found all along Ram Inthra.

Key principle: disinfection spraying is done only after mud has been removed and surfaces washed and wiped. It does not replace cleaning. During application, residents, staff and pets must leave the zone being sprayed and return at the time the technicians give. In condominiums, the juristic office should notify residents in advance and cordon off the area while work is under way.

The Spraying Process for Ram Inthra Condos and Offices

1. Book and divide into zones: call 065-556-6294 or add LINE @whd268. Give the location, such as Ram Inthra Soi 5, Soi 23 or near Lat Pla Khao station, plus the area and the floors the water reached. A juristic office might split the job into car park, lift lobby, bin room and ground-floor units.
2. Prepare the area: remove mud, wash floors, take wet rubbish out of the building, move cars out of the zone to be sprayed, put away documents and electronics in offices, and tell residents when to avoid the area.
3. Technicians spray: in protective gear, the team applies CHEMGENE by spraying and/or ULV, working from the innermost area towards the exit and focusing on floors, lower walls, pillars, doors, lift buttons, handrails and shared touch points.
4. Wait about 30 minutes: according to the service information, wait about 30 minutes after spraying, with everyone outside the zone.
5. Reopen the space: open doors to ventilate and resume normal use when the technicians say so.

According to the service information, customers receive a CHEMGENE spray bottle and WELLGIENIC wet tissues for ongoing care of high-touch points such as lift buttons and the juristic counter, and a tax invoice is available, which suits condominium juristic persons and companies.

10 Reasons Buildings on Ram Inthra Should Book Disinfection After the Flood

1. Many people share the same touch points. One lift button may be pressed hundreds of times a day, so a building-wide treatment is better value than spot-wiping.
2. Ground-floor car parks take the sewage first. Post-flood car park disinfection helps break the chain from tyres and shoes.
3. ULV mist covers large areas. Ideal for big lobbies, pillars and tall walls.
4. A medical-grade disinfectant. CHEMGENE HLD4H from the UK, according to the service information.
5. Respiratory virus coverage. The service information lists RSV, H1N1 and COVID-19, relevant for offices where everyone returns at once.
6. Only about 30 minutes' wait. It can be done at quiet times, such as weekday late mornings or after office hours.
7. Less burden on building cleaners. Technicians bring protective equipment and expertise, so cleaners do not handle concentrated disinfectant themselves.
8. Referenced standards. The service page cites EN 14476:2013+A2:2019 and several endorsing bodies, useful when explaining the work to residents.
9. Supplies for ongoing care. A CHEMGENE spray bottle and WELLGIENIC wet tissues under the promotion, ready for the juristic counter or reception desk.
10. Tax invoices available. Juristic persons, companies and shops in Bang Khen can account for it properly. Request a disinfection quote.

Before and After Disinfection: A Condo in a Ram Inthra Soi

Example Case: A Ground-Floor Accounting Office Near Ram Inthra Soi 5

An illustrative example to explain the process, not a verified customer review.

Ek runs a small bookkeeping firm from a rented three-storey commercial building near the mouth of Ram Inthra Soi 5. The ground floor holds the client reception room and the file store; the second floor seats eight staff. When the road water reached about 20 cm, as the news reported, it seeped in under the glass door and flooded the ground floor. The large reception carpet was soaked and the bottom drawers of the steel filing cabinets were caked in mud.

After the water receded, Ek had staff move salvageable files upstairs, threw away the wet carpet and cardboard boxes, and hired people to wash the floor and walls. The ground floor still smelled musty, though, and two staff developed a blocked nose and cough. He contacted WHD to spray the entire ground floor, including the stairs and toilet.

The team booked a Saturday when the office was closed and asked Ek to move computers and key documents upstairs. They then sprayed and misted the ground floor, waited about 30 minutes as per the service information, and opened the doors to ventilate. On Monday the office reopened to clients. Ek put the CHEMGENE spray bottle on the document counter, and because a faint musty smell lingered in the file store, he later asked about ozone treatment as an additional step.

Checklist for Juristic Offices, Office Owners and Homes on Ram Inthra

Before disinfection

• Have an electrician inspect electrical rooms, pump rooms and any sockets that were under water before use.
• Cleaners and workers wear boots, rubber gloves and masks, with all cuts covered.
• Clear all mud and wet rubbish out of the car park and bin room.
• Wash floors, lower walls, pillars and doors with clean water and detergent.
• Discard soaked carpets, fabric partitions and cardboard boxes.
• Tell residents or staff in advance when spraying will happen and which areas to avoid.

After disinfection

• Re-enter at the time the technicians give and ventilate.
• Set up hand-wipe points with spray bottles at the lift lobby, counters and office entrances.
• Check for areas that stay damp, especially storerooms and car-park walls.
• If closed rooms still smell musty, consider ozone disinfection as an add-on. It must be done in a closed room with no people, pets or plants inside.
• Anyone with fever, calf pain, diarrhoea or vomiting should see a doctor immediately.

FAQ: Post-Flood Disinfection on Ram Inthra

Q: Our condo is on Ram Inthra Soi 23 and only the car park flooded. Which areas should be sprayed?
A: Cover the car park, the route from the car park to the lift lobby, the lifts and their buttons, the fire stairs and the bin room, because that is the path residents use to carry germs inside on their shoes. The team can help set the right scope.

Q: Do we have to close the whole building?
A: No. Work can be done zone by zone, cordoning off the area being sprayed, keeping residents out of it, and waiting about 30 minutes as stated in the service information before reopening.

Q: Can we spray before clearing the mud?
A: No. Remove mud and wash first, because dirt reduces the effectiveness of disinfectant.

Q: Can you spray an office full of computers?
A: Yes. Put away or cover documents and electronics first and tell the technicians about any equipment that needs special care.

Q: Is there no residue at all afterwards?
A: We do not claim that. Follow the technicians' guidance on re-entry time and on food-contact surfaces.

Q: I waded through Ram Inthra Soi 24 for days and now have a fever and calf pain. What should I do?
A: See a doctor immediately and mention the flood exposure, as these can be signs of leptospirosis. Disinfecting your home cannot replace treatment.

Make Ram Inthra Buildings Safe Again for Everyone Who Shares Them

Condos, offices, shops and homes on Ram Inthra Soi 5, Soi 23, Soi 24 and from Bang Khen Circle to Lat Pla Khao station can book WHD Chemgene disinfection spraying today.

Book Disinfection on Ram Inthra

Call 065-556-6294 · LINE @whd268

Related Links

• World Health Disinfection spraying service
• CHEMGENE HLD4H disinfectant
• Residential and building ozone disinfection

References

• Thai PBS, water depths and flood points, 29 Sep 2026: thaipbs.or.th/news/content/558830
• Dailynews, high water at Ram Inthra Soi 23 and 24, 29 Sep 2026: dailynews.co.th/news/6232155
• Post Today, Bangkok flood summary: posttoday.com/blogs/general-news/749418
• CDC, Floods: cdc.gov/floods
• World Health Organization fact sheets: who.int/news-room/fact-sheets
• Thailand Department of Disease Control: ddc.moph.go.th