Lampang Flash Floods, 2026 (B.E. 2569): When the Water Reached the Pig Houses

According to Matichon, on 12 August 2026 (B.E. 2569), four days of accumulated rain sent flash floods into 8 villages across 5 subdistricts in 3 districts of Lampang: Wang Sai Kham and Rong Kho subdistricts in Wang Nuea district, Mae Suk and Mueang Mai subdistricts in Chae Hom district, and Wiang Tan subdistrict in Hang Chat district. The water flooded homes, farmland and pig houses, and the Mae Luen reservoir overflowed (source: Matichon).

Flooding in 2026 (B.E. 2569) went on to spread across many regions. Data from the Department of Disaster Prevention and Mitigation as of 06:00 on 7 October 2026 (B.E. 2569) showed 27 provinces plus Bangkok affected, covering 123 districts and 984 subdistricts, with 1,154,875 households and more than 3.1 million people affected (source: Government Public Relations Department).

Flash floods in the north behave differently from slow standing floods on the plains. They arrive fast and with force, carrying soil, sediment, branches and contamination from upstream. When they cross a livestock farm, they drive mud onto pen floors, into feed troughs and drinkers, and along the aisles of animal housing, and they can carry germs from one farm to the next.

Example Case: A Mid-Sized Finishing Pig Farm in the Foothills of Chae Hom

This is an illustrative example case drawn from situations common on livestock farms after flash floods. It does not describe any real farm.

Uncle Prasert has raised finishing pigs for almost twenty years on foothill land in Chae Hom. On the fourth night of heavy rain he heard the creek behind the farm roaring louder than usual. Within an hour, muddy water was running into two of his four pig houses. He, his son and the farm workers spent the night moving pigs up to the higher houses.

By morning the water was falling. The flooded houses had several centimetres of mud on the pen floors, feed troughs full of sediment, sacks of feed on the floor soaked and useless, and tide lines of soil on the curtains. Sections of the perimeter fence had collapsed, letting dogs and outside animals wander in, and the footbaths at the house entrances were buried under mud.

What worries Uncle Prasert most is the pigs still on the farm. Moving animals between houses during the flood, workers wading back and forth, and water that had already passed through other land upstream are all possible routes for disease. He owns one small hand-pump sprayer used in the vegetable plot, but looking at four houses tens of metres long, the yard, and the feed-truck entrance, he knows at once that a hand pump will never disinfect it all thoroughly in time.

Flood-Borne Germs That Threaten Both People and Animals

A livestock farm is a place where people and animals live and work closely together, surrounded by manure, feed and moisture. When a flash flood passes through, several groups of germs get the chance to multiply and spread.

• Bacteria such as E. coli and Salmonella, which are found in manure and contaminated water and cause diarrhoea in both people and animals, as well as Leptospira, the cause of leptospirosis. Leptospirosis is a zoonotic disease: farm animals such as pigs can be infected, and farmers who wade through water or have cuts on their hands and feet are at high risk.
• Viruses. For workers, norovirus and rotavirus cause diarrhoea when hygiene breaks down after floods, and respiratory viruses such as influenza and RSV spread easily when exhausted workers rest together. For animals, farms should watch closely for animal disease outbreaks following the advice of their veterinarian and the Department of Livestock Development, because water and mud can carry pathogens across areas.
• Molds that grow in wet feed, rice husk, bedding and the timber in animal housing. Moldy feed should not be fed to animals, and airborne mold spores also affect workers' breathing.

The core of farm disease prevention is biosecurity: separating areas, controlling movement of people, vehicles and animals, and systematic cleaning and disinfection. A flash flood can break all three in a single night, so restoring the system must be fast and thorough.

It must be stressed that the disinfecting effect comes from the disinfectant, not the sprayer. Farms should choose a registered product whose label allows use in animal housing, apply it at the label rate and contact time, and ask their veterinarian or district livestock officer for advice. For general farm buildings such as worker housing, the office and toilets, a product like Chemgene HLD4H disinfectant sold by WHD may be considered, used according to its label. In every area, mud and manure must be removed before spraying, because organic matter greatly reduces how well disinfectants work.

The Pain Points of Livestock Farms After a Flash Flood

Time does not wait. Animals still need feed and water every day. A farm cannot pause like a factory line, so cleaning and disinfection must run alongside daily animal care, stretching every worker.

Large areas, few hands. Each house is tens of metres long, with pens, troughs, pipes, curtains and fans, plus yards, vehicle entrances and feed stores. Most family farms have only a few workers, so covering everything with a hand pump in a short time is impossible.

Disease risk is livelihood risk. An outbreak in the herd or flock after a flood costs more than medicine and treatment. It can wipe out a whole production cycle's income and affect neighbouring farms across the village.

Farmer safety. Workers who wade through water, move animals and shovel manure mixed with mud face a higher risk of leptospirosis and wound infections than most people.

Farm standards and buyers. Farms in certification schemes or supplying integrators must show that biosecurity has been restored after an event. A clear procedure and disinfection records matter.

Flash floods can come every year. Farms in the foothills or near creeks in the north may face flash floods again in future rainy seasons. Durable equipment that lasts for years is a sensible investment.

Why Hand Pumps and Hoses Fall Short in Animal Housing

• Hand-pump sprayers are designed for vegetable plots and small gardens. Reach is short, droplets are coarse, and the operator must stop to pump often. Across several long houses, walls, ceilings, roof frames and curtains, operators tire and coverage suffers.
• Hoses and pressure washers are good for removing mud and manure, but used to apply disinfectant they dilute it, run it onto the floor wastefully, and leave pens wet for longer.
• Pouring disinfectant from buckets works for footbaths and small areas but cannot reach high walls and roof structures.

Farms need a tool that reaches the length of a house, lifts mist up to roof frames and curtains, uses chemical economically, and lets one worker cover a lot of ground quickly.

Many farms know the term "thermal fogger", a machine that uses heat to make fog. The SOLO PORT 423 is not a thermal fogger. It is an air-blast mistblower driven by an engine fan, with no heat, which makes it suitable for applying disinfectant to the surfaces of houses, pens and equipment.

The Answer for Farms: the SOLO PORT 423 Backpack Mistblower from Germany

The SOLO PORT 423 is made by SOLO Kleinmotoren GmbH in Germany, which lists applications for this machine line including pest control, agriculture and plant care. A single-cylinder two-stroke engine drives a fan that produces strong airflow, breaking the liquid into fine mist and carrying it a long way. Key facts for farms:

• Displacement 72.3 cm³ and power 3.0 kW / 4.1 HP, according to SOLO manufacturer data.
• 12 L spray-liquid tank, according to SOLO manufacturer data, for long stretches of spraying between refills.
• Maximum airflow of 1,400 m³/h, according to SOLO manufacturer data, carrying mist up to roof frames and curtains.
• Horizontal reach of about 12 m, according to SOLO manufacturer data, suited to walking the central aisle of a house.
• Dry weight 11.0 kg and 97 dB(A) at the operator, according to SOLO manufacturer data.
• ULV-type droplets below 30 microns that save chemical, according to WHD product information; actual droplets depend on the nozzle and settings.
• 1.4 L fuel tank, BING float carburettor, electronic ignition and Nikasil cylinder, according to WHD product information.

In animal housing the advantage is clear: one worker can walk the central aisle and cover the pens on both sides, the walls and the overhead structure in a single pass. The rotatable spray tube makes it easy to swing from floor to ceiling. The built-in engine works even when farm power is still off or unsafe after the flood, which is common in rural areas.

According to WHD product information, the unit has a long nozzle and a wide-angle diffuser, a translucent UV-resistant tank that shows the liquid level, a wide filler that reduces spills, and a one-hand lever combining throttle, dosing and stop, plus a padded harness and four-point anti-vibration mounts. For other optional kits in the SOLO range, ask the dealer directly.

10 Reasons Pig Farms, Poultry Farms and Livestock Pens Should Own a SOLO PORT 423

1. Restore biosecurity quickly. Disinfect empty houses, yards and vehicle entrances as soon as the mud is cleared, without waiting for a service from town.
2. Cover long houses with one person. About 12 m of horizontal reach, according to SOLO manufacturer data, cuts the number of trips into the pens.
3. Reach ceilings, curtains and roof frames. 1,400 m³/h of airflow, according to SOLO manufacturer data, lifts mist where a hand pump cannot.
4. Save disinfectant. Fine ULV-type droplets, according to WHD product information, coat surfaces evenly without flooding pen floors.
5. No electricity needed. Ideal for rural farms where power often fails or needs checking after a flash flood.
6. Year-round disease prevention. Disinfect houses between batches, farm entrances and perimeter areas as part of the biosecurity plan your vet recommends.
7. An engine built for hard work. MAHLE and BING parts and a Nikasil cylinder, according to WHD product information, suit farm conditions.
8. Easy one-hand control. Adjust dosing instantly in areas that need care, such as equipment rooms or farrowing rooms.
9. Disinfection records. Set your own spray schedule and log each treatment for farm-standard audits or buyer inspections.
10. Local supplier advice. Ask questions and request a SOLO PORT 423 quotation by phone or LINE.

Before and After: Disinfecting Animal Housing With a Backpack Mistblower

Step by Step: Disinfecting Animal Housing After a Flash Flood

1. Talk to your vet or district livestock officer first. Explain the farm's situation and ask about suitable disinfectants, local animal-disease concerns and recommended procedures.
2. Check building safety. Cut power to flooded houses and check structures, roofs and pens that the water may have damaged before workers go in.
3. Move animals out of the house to be treated. Disinfect empty houses only. Never spray animals unless the product label and your vet say it is allowed.
4. Remove contaminated materials. Take out wet feed, rice husk, bedding and soaked sacks and dispose of them as advised by the authorities. Never feed moldy feed to animals.
5. Clear all mud and manure. Scrape, sweep and wash pen floors, troughs, pipes and walls, using water with detergent to lift grease and organic matter. This is the most important step in disinfection.
6. Let it dry. Open the curtains for airflow and use fans to speed drying.
7. Prepare product and machine. Mix a disinfectant registered for animal housing at the label rate, refuel only with the engine off and cool, and put on full PPE.
8. Spray from the far end toward the door. Work top to bottom: roof frame, curtains, walls, then pens, troughs and floor, always backing out toward the door. Avoid spraying directly into electrical panels and motors.
9. Treat the surroundings. Vehicle entrance, yards, feed store and wheel-wash point. Restore footbaths and hand-wash stations.
10. Rest the house before restocking. Wait out the contact time and the downtime advised on the label and by your vet, rinse drinkers and feeders with clean water if the label requires, then bring animals back and log the date, product and operator.

Safety When Using a Backpack Mistblower on the Farm

• Hearing protection. 97 dB(A) at the operator, according to SOLO manufacturer data. Wear earmuffs or earplugs every time, and spray empty houses so noise does not stress animals.
• Limit continuous use. Vibration up to 6.3 m/s², according to SOLO manufacturer data. Take breaks and take turns, especially on farms with several houses.
• Chemical PPE as per label and SDS. Chemical-resistant rubber gloves, goggles or face shield, a suitable respirator, long sleeves and trousers, and rubber boots, which also protect against leptospirosis from mud.
• Refuel safely. Engine off and cool before refuelling, in the open, away from straw, rice husk and other flammable farm materials.
• Weight when full. About 11 kg empty and roughly 23 kg or more with a full 12 L tank. Pen floors are slippery after a flood, so move slowly and fit the harness snugly.
• Keep people and animals out of the spray zone. Move livestock out first, keep dogs, cats and children away, never spray into the wind, and never spray into animal drinking water or streams.
• Follow re-entry times for both people and animals, per the label and your vet.
• Train before use. Learn starting, dosing, emergency stop and cleaning the tank and nozzle after use, and read the manufacturer's manual in full.

Farmers and workers who waded through flash-flood water, moved animals or cleared mud should see a doctor promptly if they develop high fever, headache, calf pain, red eyes or infected wounds, and mention their flood and animal exposure. Disinfection is an environmental measure; it does not replace medical care or veterinary care for animals.

Buy a Machine for the Farm or Hire a Service?

Farms with several houses, farms that rest and disinfect houses every batch, and farmer groups or cooperatives wanting shared equipment gain most from owning a SOLO PORT 423, because disease prevention on a farm is year-round work, not only a flood response. A machine on hand means you can act immediately.

For general buildings such as worker housing, the farm office or village shops whose owners do not want to buy a machine, WHD's disinfection spraying service is a separate option in which the team uses its own equipment and products. Ask about service areas before booking.

Frequently Asked Questions

How do I disinfect a pig house after a flood?

Consult your vet or district livestock officer, move animals out, remove contaminated materials, clear mud and manure, let it dry, spray a disinfectant registered for animal housing per its label, and rest the house before restocking.

Which backpack sprayer for farms has the longest reach?

The SOLO PORT 423 offers about 12 m of horizontal reach and up to 1,400 m³/h of airflow, according to SOLO manufacturer data, suiting long houses and farm yards.

What is the SOLO PORT 423 price?

WHD does not list a price online. Request a quote on 065-556-6294 or LINE @whd268. Farmer groups and cooperatives can ask about terms for several units.

Can I spray disinfectant while pigs or chickens are inside?

Generally, spray empty houses only. Never spray animals unless the product label and your vet allow it, and follow the waiting time before animals return.

How is a mistblower different from a thermal fogger?

A thermal fogger uses heat to make fog. The SOLO PORT 423 uses air from an engine fan to create mist with no heat, suiting application onto surfaces of houses and equipment.

Which disinfectant should pig and poultry farms use?

A registered product labelled for animal housing, as advised by your vet or the Department of Livestock Development. For general farm buildings, a product such as Chemgene HLD4H can be used per its label.

Are pig farmers at risk of leptospirosis after flash floods?

Yes, because they wade through water and handle mud and manure. Wear boots and gloves, cover wounds, and see a doctor quickly if fever or calf pain follows.

Can a mistblower be used on a rural farm with no power?

Yes. The SOLO PORT 423 has its own engine and needs no electricity, so work can start even before farm power is restored.

How often should a farm be disinfected after the water recedes?

It depends on your biosecurity plan, the product and your vet's advice. In the early weeks, high-risk points such as farm entrances and wheel-wash areas usually need more frequent treatment.

Restore Your Farm Systematically After the 2026 (B.E. 2569) Flash Floods

Get advice on using a backpack mistblower in animal housing and request a SOLO PORT 423 quotation today.

View SOLO PORT 423 and Request a Price

Call 065-556-6294 | LINE @whd268

Related Reading and References

• SOLO Port 423 backpack mistblower against dengue outbreaks for municipalities and TAOs (Thai)
• Spraying against emerging diseases with the SOLO Port 423 for provincial public health offices (Thai)
• Chemgene HLD4H disinfectant
• WHD disinfection spraying service
• Lampang flash flood report, 2026 (B.E. 2569): Matichon
• National flood summary, 2026 (B.E. 2569): Government Public Relations Department
• Livestock and animal disease information: Department of Livestock Development