Fine Quarry Dust Mixed With Dust Mites in the Mattresses of a 128-Worker Camp: A True Saraburi Story and the Dust Mite Removal Service That Fixed the Bedrooms
Last updated: 13 Oct 2026 | 11 Views |
Fine Quarry Dust Mixed With Dust Mites in the Mattresses of a 128-Worker Camp: A True Saraburi Story and the Dust Mite Removal Service That Fixed the Bedrooms
At 5:40 on the morning of Tuesday, 12 May 2026, a dry cough rolled down the second floor of Dormitory 3 in the worker camp of Sila Hin Son Co., Ltd., a mid-sized limestone quarry and crushing plant in Hin Son subdistrict, Kaeng Khoi district, Saraburi province. The pit face was only 900 metres away.
Khun Weerapong Kaewmanee, 46, the company's human resources and safety manager, was making his usual round of the camp. He stopped outside room 3-207 and saw a scene he had watched for months until it stopped looking strange. Two men sat on the edge of their beds. One was sneezing in long bursts until his eyes ran. The other coughed until he had to bend over and hold his knees. Neither had been anywhere near the crusher yet.
"I used to believe it was quarry dust, full stop," Weerapong said. "We run a quarry. Dust is the ready-made answer to everything. But when I sat down with the real numbers, I saw something that quarry dust could not explain."
The camp has 64 rooms in four dormitories, two workers each, so 128 workers. Each bed has a five-inch foam mattress bought in March 2022. In four years and two months none had been washed or properly vacuumed.
The figure that made Weerapong put down his pen was respiratory sick leave. Between December 2025 and February 2026 the camp logged 212 days of it. The three months before that had logged 118. That is an increase of almost 80 percent, with practically the same headcount and the same output.
Inspectors were due to visit in August and the annual worker health checks were set for 20 May, so he needed an explanation and a fix before anyone asked.
This story is about separating two problems that look like one. The first is quarry dust at the work site, which belongs to dust control systems and protective equipment. The second is what was hiding in the bedrooms, which nobody had ever looked at.
What Was Actually Happening in 64 Bedrooms
Weerapong asked Khun Wanida Sukcharoen, 39, the camp clinic nurse, for help. Her daily medicine logs, laid side by side, showed a pattern.
Between 13 and 30 May 2026 she and her team handed a short questionnaire to all 128 workers. A total of 121 answered.
- 47 workers said they sneezed five or more times in a row after waking, especially in the first ten minutes out of bed.
- 38 workers said they had a dry cough in the morning or in the middle of the night that eased once they went outdoors.
What made Wanida stop was the timing: the cough and sneezing was worst in the morning, before the shift, before anyone had met quarry dust, and it was spread across every department.
On 19 May 2026 Wanida took the six most affected workers to an allergy specialist at a hospital in Saraburi city. Skin prick tests showed that all six reacted clearly to house dust mite extract. The largest wheal measured 11 millimetres, and in four of the six the dust mite reaction was larger than the reaction to any other allergen on the panel.
The doctor stressed that each worker must be assessed individually by a physician, since quarry dust may already irritate airways and the two sources are hard to separate.
So Weerapong decided to open up a mattress and look for himself.
On the evening of 21 May 2026 he had a technician carry the foam mattress from room 3-207 out onto the concrete in front of the building and tip it on its side. The top looked fine and the sheet was not torn. But when he wiped the seams and the underside with a white cloth, it turned grey-brown almost at once. A fine powder clung in sheets, mixed with hair and lint.
Why Dust Mites Are Especially Bad in a Quarry Worker Camp
A quarry camp ticks almost every box for dust mites, and not because the workers are dirty. It is the nature of the work and the place.
1) Foam mattresses that were never washed
Foam is full of tiny pores that soak up sweat and the skin cells everyone sheds each night, which is excellent food for dust mites. Mattresses passed between people as shifts rotated, so the skin cells of many workers had piled up for over four years.
2) Fine quarry dust carried back to the bed
The company has a changing room, but after a ten-hour shift many workers walk back in work clothes. Fine limestone dust clings to hair and clothing and falls into the foam. It is not food for mites, but it acts like glue that binds lint, hair and skin flakes into a thick layer, and when a blanket is shaken everything is thrown into the air together.
3) Damp rooms in the Saraburi rainy season
The rainy season in Saraburi runs from May to October. In rooms with small windows and ceiling fans, relative humidity sits at around 70 to 80 percent almost all year, which is a very comfortable range for dust mites. Sweat-soaked clothes hung to dry in the room add yet more moisture.
The Damage: Health, Money, Safety and Reputation
Health of the workers
Of the 121 respondents, 69 (about 57 percent) had at least one morning airway symptom, 26 could not sleep for itching and coughing, and 11 bought antihistamines or cough medicine themselves, about 300 baht a month each.
People who do not sleep well cannot operate heavy machinery safely, and there were three near misses between March and April 2026 when a loader reversed into a rock pile with a drowsy driver.
Money
The extra 94 days of sick leave in three months, at 480 baht a day, came to roughly 45,000 baht paid for no work. Adding overtime, clinic medicine and slower production from December 2025 to May 2026, accounting estimated the cost at about 186,000 baht.
Reputation and regulatory risk
A batch of abnormal health check results across a camp makes inspectors ask questions, and without an explanation the company can look as though it ignores accommodation welfare. Weerapong says this worried him more than the money, because skilled workers move jobs easily.
Why What Most Camps Already Do Is Not Enough
The company had not been idle, and every step it took is something other camps do too. It swept and mopped weekly, which clears floor dust but not the foam under the sheet, and sweeping throws fine powder into the air to settle back in the same place. It sun-dried mattresses once, in March 2025, but heat does not reach the core of a five-inch block and dead mites still leave allergen behind. It bought two bagged vacuum cleaners that clogged with quarry dust within months and let fine particles back out of the exhaust, so the more workers vacuumed, the more they sneezed. Masks in bed were unbearable in the heat and air fresheners only left a scent while the allergen stayed put.
Weerapong summed it up. The problem was not the surface of the room and not a lack of effort. It was the deep layer inside the mattress, which calls for different equipment and a different method from ordinary cleaning.
Know the Dust Mite: Biology, Life Cycle and Why It Thrives in Thailand
The dust mite is an eight-legged arthropod only 0.1 to 0.3 millimetres long, too small to see. It does not bite or suck blood; it feeds on shed skin cells. The main trigger is the allergen in its droppings and body fragments, which sensitive people inhale. A female lays dozens of eggs, and a warm, damp mattress can build a large population within three to four weeks.
Why it thrives in Thailand
Thai temperatures of 25 to 30 degrees Celsius and year-round humidity suit dust mites perfectly, and a foam mattress under a sheet is an ideal dark refuge.
What dust mite allergen is associated with
Dust mite allergen is associated with allergic rhinitis, conjunctivitis, eczema-type skin inflammation and headache, and it can trigger asthma symptoms. See the WHO asthma fact sheet and household air pollution fact sheet.
An Honest Limit: This Service Is Not a Substitute for Occupational Dust Control
This must be said plainly, and Weerapong himself asked that it be written into this article.
The World Health Disinfection dust mite removal service takes care of sleeping areas: mattresses, pillows, curtains and carpets in the rooms. It reduces dust mite allergen in bedding. It is not control of quarry dust at the work site and cannot replace any occupational safety and health measure a quarry or crushing plant is responsible for.
Water spraying, extraction at crushers, dust measurement, fitted respiratory protection and health surveillance must all continue. The service can remove one allergen source from the bedroom so workers rest in cleaner air for seven or eight hours a day, and so doctors can see more clearly what comes from the job and what comes from the bedroom.
With expectations set correctly, Weerapong set three conditions: work on site without moving mattresses, finish on a rest day, and throw no dust back into the room.
The Solution: A Complete Dust Mite Removal Service From World Health Disinfection
On 28 May 2026 Weerapong phoned World Health Disinfection after finding the dust mite removal, carpet, mattress and sofa cleaning service with full disinfection, described as the first of its kind in Thailand. He asked directly whether 128 foam mattresses could be done and whether work would have to stop.
The team explained that it works on site without dismantling anything, around the camp rest day. A site survey on 4 June 2026 defined the job: 128 foam mattresses, 128 pillows and 64 curtain sets, with two teams working over two days.
What the service does
- Extracts allergen from mattresses, pillows, curtains and carpets with the SIRENA System dust mite machine.
- Adds deep washing with the MASTER VACUUM for mattresses, sofas and carpets.
- Offers optional disinfection spraying against viruses, bacteria and fungi.
- Finishes with two free gifts: WELLGIENIC disinfectant wet wipes and CHEMGENE HLD4H disinfectant.
The Technology Behind the SIRENA System
The SIRENA System is a dust mite machine designed in Canada, driven by a 1200-watt cyclonic motor from Italy. Four things set it apart from an ordinary vacuum cleaner.
1) Water filtration
Air drawn in passes through water. Dust, fine powder and allergen are trapped in the water 100 percent and are not thrown back into the room. This matters a great deal in a bedroom contaminated with fine quarry dust, because bagged vacuums tend to blow fine powder back out of the exhaust.
2) A HEPA filter
After the water, the air passes through a HEPA filter that captures particles down to 0.02 micron.
3) 99.99 percent allergen removal
According to the service information, the system removes 99.99 percent of allergens. It is certified by the Asthma Society of Canada, and carries marks from TUV Rheinland, Certified Vacuums, Quality Tested, Certified Space Technology, Dust Mite Proof and Go Green.
4) The water in the tank is the evidence
After each job the technician shows the customer the grey-brown water in the filter tank. More about the machine is on the SIRENA dust mite machine page.
10 Reasons to Choose the World Health Disinfection Dust Mite Removal Service for Camps and Worker Housing
- On site at the camp. No need to move 128 mattresses off the property.
- No dismantling. Mattresses, curtains and carpets are treated in place.
- No dust thrown back. Water filtration traps dust 100 percent.
- Filtration to 0.02 micron with a HEPA filter after the water stage.
- 99.99 percent allergen removal, according to the service information.
- A 1200-watt Italian cyclonic motor that reaches deep into foam.
- Scheduled around the camp rest day.
- Complete in one visit, with optional disinfection spraying.
- Visible results in the filter tank water.
- Gifts you keep using: WELLGIENIC wipes and CHEMGENE HLD4H.
How the On-Site Service Works at a Camp
- Site assessment of room count, mattress type, humidity and access.
- Plan the days around a rest day and split the buildings into zones.
- Prepare the rooms: belongings up high, sheets and pillowcases to the laundry.
- Extract allergen with the SIRENA System from both sides of each mattress, the frame edges and the pillows.
- Deep wash with the MASTER VACUUM where build-up is thick, and clean curtains and carpets without taking them down.
- Optional disinfection spraying.
- Inspect the filter water together and summarise the work room by room.
- Hand over the gifts with aftercare advice.
Comparison: Ways of Dealing With Dust Mites in Worker Bedrooms
Saturday, 11 July 2026 at the Sila Hin Son Camp
At 7:00 on Saturday, 11 July 2026, the camp rest day, two World Health Disinfection teams arrived at Dormitory 1 with several SIRENA System machines each. Workers had put valuables up high and waited in the canteen.
Weerapong watched the first room. The technician lifted off the sheet, set the suction head on the mattress and drew it slowly in rows, then turned the mattress over and repeated it, then worked around the seams and the steel bed frame. The suction was heavy and firm, a world away from the vacuum cleaners the camp had bought.
The job took two days, 11 and 12 July. All 128 mattresses, 128 pillows and 64 curtain sets were done, and the rooms were ready before the Monday, 13 July morning shift. Weerapong kept the room-by-room report and filter tank photographs as evidence for the safety team.
Before and After at the Sila Hin Son Camp
Before (December 2025 to June 2026)
- Respiratory sick leave of 212 days in three months, up from 118
- 47 of 121 respondents sneezing hard on waking, 38 with a dry cough
- 5 room-change requests in three months
- Total cost of about 186,000 baht
- 128 foam mattresses never washed in 4 years and 2 months
After (July to September 2026)
- Respiratory sick leave averaging 29 days a month, down from 71 in January
- Repeat survey on 21 September 2026: hard sneezing on waking down to 14 of 119
- Dry morning cough down to 12
- No room-change requests over three months
- Near misses linked to drowsiness down to 1
The result was not zero. Some workers still cough or sneeze, and doctors and the safety team follow them individually, because the cause may be work-site dust, smoking or other illness. The dust mite service never claimed to fix those.
Common Myths About Dust Mites in Worker Camps
Myth 1: A clean-looking mattress has no dust mites
Mites are invisible. A tidy mattress can hold a great deal of allergen inside.
Myth 2: The cough is only quarry dust
Quarry dust is a real risk and must keep being controlled at the work site. But if symptoms are worst on waking and improve after leaving the room, the bedroom should be checked too. Let a doctor decide.
A Real Customer's Voice
"I have run the conveyor here for three years. Since the start of this year I woke up every morning coughing and sneezing for almost half an hour before I could go and eat. My roommate was the same. We thought it was all quarry dust. The clinic gave me antihistamines now and then.
On the day the team came, I watched them open the filter tank after finishing my mattress. Muddy brown water. About two weeks later I no longer sneezed in a row when I woke up. My last sick day was in June.
The quarry dust at the work site is not gone. We still wear masks and the company still sprays water at the crusher. But the bedroom really is better."
Khun Sommai Srisuk, 41, conveyor operator, Sila Hin Son camp, Kaeng Khoi district, Saraburi
How Weerapong's Story Ended
The annual health check results of 20 May 2026 came back as expected, with several workers needing follow-up for their airways. But when the safety inspectors visited the camp on 18 August 2026, Weerapong had two sets of documents in his hands. The first was the work-site dust control plan the company already ran and meant to keep improving. The second was the record of the corrected bedrooms, with photographs and a room-by-room report.
"I am not trying to use a receipt in place of safety measures," he stressed. "I want everyone to see that we are fixing both things properly."
His advice to fellow quarry managers is short. "If your people cough in the morning before work, do not blame only the quarry dust. Go and look at the mattresses too."
Everything in One Visit, With Gifts You Can Actually Use
After the service, customers receive two gifts.
- WELLGIENIC disinfectant wet wipes, which kill 99.99 percent of germs, for wiping hands, bed edges and handrails.
- CHEMGENE HLD4H disinfectant spray and liquid, which kills 99.85 percent in one minute and protects for up to 14 days. See the CHEMGENE HLD4H page.
To disinfect whole buildings such as the canteen and shared bathrooms, add the disinfection spraying service. For general disease information, see the Department of Disease Control, Ministry of Public Health.
If Your Workers Quarters Have Started to Sound Like a Morning Cough Chorus
Do not wait for sick leave to climb the way it did at Sila Hin Son. Have the team assess and remove dust mite allergen on site: mattresses, pillows, curtains, sofas and carpets, all in one visit and without dismantling anything.
See Full Service Details and Pricing — Click Here
Call now: 065-556-6294
LINE: @whd268
World Health Disinfection Co., Ltd.
88/268 Kanlapaphruek Road, Bang Khae, Bang Khae District, Bangkok 10160
Frequently Asked Questions About Dust Mite Removal for Worker Camps
Can a dust mite removal service replace quarry dust control?
No. The service takes care of sleeping areas to reduce dust mite allergen. Controlling dust at the work site remains the operator responsibility under occupational safety and health practice, and both should be done together.
Do the foam mattresses in a camp have to be taken off site?
No. The team works on site without dismantling anything. For 128 mattresses and 128 pillows, two teams take about two days, best booked on the camp rest day.
How is the SIRENA System different from a vacuum cleaner we bought ourselves?
The SIRENA System is designed in Canada and uses a 1200-watt Italian cyclonic motor with water filtration and a HEPA filter capturing down to 0.02 micron. Dust and allergen are trapped in water 100 percent and do not return to the room, unlike ordinary vacuums, which often let fine particles back out.
Can we be sure morning coughing and sneezing come from dust mites?
You should not conclude that yourself. Symptoms may come from work-site dust, smoking or other illness, so a doctor should assess each person. Symptoms that are worst on waking and ease outdoors are a clue to examine the bedroom as well.
How often should a worker camp book the service?
For heavily used housing in a dusty area, every 3 to 4 months is generally recommended, and the team recommends an interval after assessing the site.
Related Services and Reading
- Dust Mite Removal, Carpet, Mattress and Sofa Cleaning with Full Disinfection
- SIRENA System Dust Mite Removal Machine, Water Filtration + HEPA
- Disinfection Spraying Service for Viruses, Bacteria and Fungi
- CHEMGENE HLD4H Disinfectant
- WHO Asthma Fact Sheet
- Department of Disease Control, Ministry of Public Health, Thailand
Send this to a camp manager, a safety officer, or anyone who runs a quarry or crushing plant.
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