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Stay Compliant with MOM Regulations: Occupational Health Screening Services
Ensuring workplace safety and compliance with Singapore’s Ministry of Manpower (MOM) regulations is critical for employers. For employees exposed to occupational hazards, regular medical examinations are not just a regulatory requirement but a proactive measure to protect health and assess workplace safety.
Understanding Designated Workplace Doctors (DWDs)
These examinations are performed by Designated Workplace Doctors, qualified to assess the unique risks of hazardous occupations. These specific tests go beyond general checkups, targeting hazards linked to industries such as manufacturing, construction, and petrochemicals.
Key Benefits
- Early Detection: Identify occupational diseases before symptoms escalate.
- Workplace Safety Assurance: Evaluate the effectiveness of control measures.
- Fitness for Duty: Ensure employees remain fit to perform their tasks safely.
Industries and Common Hazards
Here are examples of hazards, affected industries, and required medical tests:
Arsenic Exposure
- Industries: Wood preservation, semiconductor manufacturing, pigment production.
- Tests: Clinical exams, urine arsenic, liver function tests, chest X-rays (pre-placement and annual).
Noise Hazards
- Industries: Shipbuilding, textile manufacturing, engine testing.
- Tests: Audiometry and bone conduction exams (annual checks).
Compressed Air Environments
- Industries: Tunneling, caisson work, medical hyperbaric chambers.
- Tests: Comprehensive checks including chest X-rays, lung function, and cardiovascular assessments.
Wonderhealth Screeners provides guidance and services to ensure compliance with MOM’s regulations, helping your business create safer work environments.
Ready to ensure compliance and protect your workforce? Contact us today to discuss your requirements with our experienced Designated Workplace Doctors.
How Often Should Medical Examinations Be Performed?
For employees exposed to occupational hazards, medical examinations are crucial to ensuring their safety and fitness for work. Here’s what you need to know:
Pre-Employment Medical Examination
Employees entering hazardous occupations must undergo a medical examination before starting work or within the first three months of employment. For work in compressed air environments, the examination should be completed within 30 days prior to commencing the role
Regular Periodic Medical Examinations
Periodic medical examinations are essential for ongoing health monitoring. These should be conducted at intervals specified under the Workplace Safety and Health (Medical Examinations) Regulations to detect any early signs of occupational illnesses
Special Circumstances
In some cases, the Commissioner for Workplace Safety and Health may require additional or alternative medical examinations. These might include tests related to specific occupational hazards or audiometric evaluations for noise exposure
Employers are responsible for arranging and covering the costs of these examinations to comply with statutory requirements. Proactive health checks safeguard both employees and organizations by preventing long-term health issues and workplace incidents.
Our 3-Step Occupational Health Screening Process
At Wonderhealth, we follow a streamlined 3-step occupational health screening process to ensure efficiency, accuracy, and employee well-being. This approach is designed to minimize disruptions while delivering clear insights for employers and their teams.
Step 1:
Pre-Screening Assessment
Before any physical tests are conducted, we begin with a detailed health questionnaire and risk profiling. This step helps us understand the individual’s medical history, lifestyle factors, and potential exposure risks related to their work environment. It sets the foundation for a personalized screening experience.
Step 2:
Medical Examination And Diagnostic Testing
Our licensed medical professionals carry out a comprehensive examination tailored to the job role and industry. This may include vision tests, hearing assessments, lung function checks, blood work, and other diagnostic evaluations relevant to the employee’s occupational exposure. We ensure that every occupational health screening meets regulatory standards and company policies.
Step 3:
Results Review And Advisory
After screening, results are carefully reviewed by our medical team. We provide a clear report along with confidential recommendations for both employers and employees. If necessary, follow-up actions such as specialist referrals, work adjustments, or health education may be advised to support long-term wellness.
Why Choose Wonderhealth Screeners For Occupational Health Services In Singapore
We combine medical expertise with a deep understanding of workplace health regulations to deliver tailored solutions that support both employee well-being and organizational efficiency.
- Experienced Medical Team: Our physicians and health professionals are trained in occupational medicine, ensuring accurate assessments and actionable recommendations.
- Customizable Health Programs: We recognize that each business faces unique challenges. That’s why we offer flexible occupational health services designed to meet the specific needs of different industries and workforce profiles.
- On-Site And Off-Site Screenings: Choose between convenient on-site screenings or assessments at our centrally located clinic—minimizing disruption to your operations while maximizing participation.
- Regulatory Compliance: We help your organization stay aligned with Singapore’s Ministry of Manpower (MOM) health and safety requirements, reducing liability risks and promoting a healthier work culture.
- Confidentiality And Care: Our processes prioritize employee privacy and well-being, fostering trust and encouraging proactive participation in health programs.
Frequency Of Periodical Medical Examination
| Exposed to | Do medical exam |
| Arsenic or any of its compounds | Once a year |
| Asbestos | Once in every 3 years |
| Benzene | Once a year |
| Bitumen | Once a year |
| Cadmium or any of its compounds | Once a year |
| Compressed air environment | Once a year |
| Creosote | Once a year |
| Excessive noise | Once a year |
| Lead or any of its compounds | Once in every 6 months |
| Manganese or any of its compounds | Once a year |
| Mercury or any of its compounds | Once a year |
| Organophosphates | Once in every 6 months |
| Perchloroethylene | Once a year |
| Pitch | Once a year |
| Raw cotton | Once a year |
| Silica | Once in every 3 years |
| Tar | Once a year |
| Trichloroethylene | Once a year |
| Vinyl chloride monomer | Once a year |
Hazardous Substances and Required Medical Surveillance
1. Arsenic and Its Compounds
Industries and Roles at Risk of Arsenic Exposure
Professionals in certain industries may face potential exposure to arsenic through their work. Common roles and activities include:
- Handling pesticides used in wood treatment and preservation
- Involvement in semiconductor manufacturing processes
- Manufacturing of copper or lead alloys
- Smelting operations involving arsenic-rich ores
- Production of pigments containing arsenic
- Manufacturing or application of anti-fouling paints
- Cutting, sanding, or burning wood treated with arsenic-based preservatives
- Use of herbicides, pesticides, defoliants, or animal and poultry feed containing arsenic additives
Recommended Medical Tests for Arsenic and its Compounds
Pre-Placement Health Screening (Within 3 Months of Exposure):
- Comprehensive clinical examination
- Urine arsenic level testing
- Liver function tests via blood samples
- Full chest x-ray for respiratory health
Periodic Testing (Every 12 Months):
Regular clinical examination
Urine arsenic level testing
2. Asbestos
Industries and Roles at Risk of Asbestos Exposure
- Renovation or Demolition: Activities involving structures containing asbestos materials.
- Shipbreaking and Repairs: Working on ships constructed with asbestos-based materials.
- Insulation Tasks: Replacing or removing asbestos insulation.
- Asbestos Product Handling: Managing items such as fireproof cloth and gaskets.
- Automotive Repairs: Mechanics working on asbestos brake linings in cars and buses.
Recommended Medical Tests for Asbestos Exposure
Pre-Placement Health Screening (to be done within 3 months of potential exposure):
- Comprehensive clinical examination
- Full-size chest X-ray
Periodic Testing (every 36 months):
- Clinical examination
- Full-size chest X-ray
3. Benzene
Industries and Roles at Risk of Benzene Exposure
- Petrochemical Workers: Involved in the production of benzene.
- Petrol Retailers: Employees at oil terminals, service stations, and airport terminals (handling aviation gasoline).
- Plastic and Synthetic Fiber Manufacturing: Work with chemicals like cyclohexane, styrene, and butadiene rubber in plastics, nylon, detergents, and pesticides.
- Laboratories: Use of benzene in various analytical methods.
- Solvent Handling: Work involving the use of commercial solvents such as toluene and xylene.
- Vehicle Workshops: Handling fuels that contain benzene.
- Bulk Storage Terminals: Exposure to petrol, benzene, and related products.
- Benzene-Containing Waste: Handling or disposal of waste materials with benzene.
- Wastewater Sampling: Collecting samples from plants that manage benzene-containing materials.
Recommended Medical Tests for Benzene Exposure
Pre-Placement Testing (to be done within 3 months of employment):
- Comprehensive clinical examination
- Haemoglobin (Hb) test
- Full blood count (including white blood cells, red blood cells, and platelets) and Peripheral Blood Film (PBF)
- Urinary tests for tt-muconic acid or s-phenylmercapturic acid
Periodic Testing (every 12 months):
- Clinical examination
- Urinary tests for tt-muconic acid or s-phenylmercapturic acid
4. Cadmium and Its Compounds
Industries and Roles at Risk of Cadmium Exposure
- Handling of Cadmium Waste: Dealing with waste materials containing cadmium.
- Wastewater Sampling: Collecting samples from plants processing cadmium.
- Cadmium Electroplating: Engaging in electroplating using cadmium.
- Plastic Manufacturing: Compounding polyvinyl chloride (PVC) that may contain cadmium.
- Nickel-Cadmium Battery Production: Manufacturing batteries that use cadmium.
- Pigment Manufacturing: Creating and using pigments containing cadmium.
- Alloy Production: Manufacturing cadmium-based alloys.
- Fungicide Production and Application: Using and manufacturing cadmium-based fungicides.
- Silver Brazing and Welding: Welding or brazing cadmium-containing alloys.
- Manufacturing of Electrical Appliances: Producing refrigerators, air conditioners, television tubes, semiconductors, photo-cells, fluorescent lamps, and neutron absorbers for nuclear reactors.
- Jewelry Production: Crafting jewelry that may involve cadmium.
- Automobile and Aircraft Manufacturing: Production in these industries with potential cadmium exposure.
- Metal Smelting and Refining: Smelting and refining of zinc, lead, or copper ores, and processing related scrap.
- Spray Painting: Using cadmium-based paints or removing cadmium paints through blasting or scraping.
- Solar Panel Manufacturing: Producing cadmium telluride solar panels.
Recommended Medical Tests for Cadmium Exposure
Pre-Placement Testing (to be done within 3 months of potential exposure):
- Comprehensive clinical examination
- Blood cadmium level test
- Urine Beta2-microglobulin (U-β2 m) estimation
Periodic Testing (every 12 months):
- Clinical examination
- Blood cadmium level test
- Urine Beta2-microglobulin (U-β2 m) estimation
5. Compressed Air Environments
Industries and Roles at Risk of Exposure to Compressed Air and Pressure
- Tunnelling and Shaft Sinking: Operations involving water-bearing strata.
- Caisson Work: Tasks performed on riverbeds.
- Medical Lock Attendants: Professionals managing medical lock environments.
- Healthcare Workers in Hyperbaric Chambers: Staff overseeing medical treatments in pressurized chambers.
- Leak Detection: Identifying leaks within pressurized compartments.
Recommended Medical Tests for Workers in Pressurized Environments
Pre-Placement Testing (to be done within 30 days before employment):
- Comprehensive clinical examination
- Height, weight, and body fat measurement
- Dipstick urinalysis
- Lung function tests
- Resting electrocardiogram (for individuals aged 35 and above)
- Treadmill exercise tests (if required)
- Audiometry (air conduction); bone conduction and otoscopic examination if abnormal
- Full blood count and peripheral blood film
- Test in lock (to 10 meters)
- Full-size chest X-ray
- Radiographic examination of shoulder, hip, and knee joints
Periodic Testing:
- Clinical Examination:
- At least once every 3 months for working pressures not exceeding 1 bar
- At least once every 4 weeks for working pressures at or above 1 bar
- No more than 3 days before reemployment in a compressed air environment
- After recovery from cold, chest infection, sore throat, or earache
- After illness or injury requiring more than 3 days off work
- After 14+ days of non-employment
Annual Testing (12-Month Frequency):
- Height, weight, and body fat estimation
- Dipstick urinalysis
- Lung function tests
- Resting electrocardiogram (for individuals aged 35 and above)
- Treadmill exercise tests (if required)
- Audiometry (air conduction); bone conduction testing and otoscopic examination if abnormal
Tests before Stopping Work or Every 12 Months (whichever is sooner):
- Radiographic examination of shoulder, hip, and knee joints
6. Excessive Noise
Industries and Roles at Risk of Noise Exposure
- Shipbuilding and Repair: Mechanics involved in ship construction and repairs.
- Quarry Workers: Including crushers, drillers, and other personnel operating in quarries.
- Engineering Tasks: Grinding, sawing, and other activities using high-velocity equipment.
- Heavy Metal Industries: Including iron and steel mills and related sectors.
- Metalworking: In industries such as manufacturing ball and roller bearings, fasteners (nuts, bolts, screws), and metal cans.
- Woodworking: Tasks within the woodworking industry.
- Textile Manufacturing: Involved in textile production and processing.
- Paper Manufacturing: Work within paper production industries.
- Engine Testing: Such as testing jet engines and other high-noise machinery.
- Bottling and Metal Packaging: Industries involved in bottling processes and operations with metal cans and boxes.
- Landscaping: Using leaf blowers, lawnmowers, and trimmers.
Recommended Medical Tests for Noise Exposure
Pre-Placement Testing (to be done within 3 months of potential exposure):
- Audiometry air conduction test
- Bone conduction and otoscopic examination if any air conduction result exceeds 30 dB(A)
Periodic Testing (every 12 months):
- Audiometry air conduction test
- Bone conduction and otoscopic examination if any air conduction result exceeds 30 dB(A)
7. Lead or any of its compounds
Industries and Roles at Risk of Lead Exposure
- PVC Compounding: Manufacture and use of lead stabilizers in PVC.
- Lead-Acid Batteries: Production of lead-acid storage batteries (accumulators).
- Welding and Cutting: Activities such as burning, welding, or cutting lead-coated materials, e.g., shipbreakers and welders.
- Ammunition Manufacturing: Production and use of ammunition, including work by firing range instructors.
- Lead-Based Paints: Manufacture and use of lead-containing paints.
- Solder and Alloys Production: Manufacturing of solder and lead-based alloys.
- Porcelain and Tile Production: Manufacturing and use of lead-based glazes for porcelain, enamels, and tiles.
Recommended Medical Tests for Lead Exposure
Pre-Placement Testing (to be done within 3 months of potential exposure):
- Comprehensive clinical examination
- Haemoglobin level
- Urine lead level (for organic lead exposure)
- Blood lead level (for inorganic lead exposure)
Periodic Testing (every 6 months):
- Clinical examination
- Haemoglobin level
- Urine lead level (for organic lead exposure)
- Blood lead level (for inorganic lead exposure)
8. Manganese or any of its compounds
Industries and Roles at Risk of Manganese Exposure
- Milling of Manganese Ore: Activities involving the processing of manganese ores.
- Battery Manufacturing: Production of dry-cell batteries using manganese dioxide.
- Iron and Steel Industry: Using manganese as a reagent for reducing sulfur and oxygen.
- Manganese Electroplating: Electroplating processes involving manganese.
- Manufacturing of Chemical Products: Including paints, varnishes, inks, dyes, fertilizers, feed additives, disinfectants, bleaching agents, and glass and ceramics (for decolourising and coloring).
- Production of Matches and Fireworks: Involving manganese compounds.
- Potassium Permanganate Manufacturing: Production of this chemical compound.
- Welding Operations: Using manganese-coated rods.
- Water Treatment: Manganese-related processes in water purification.
- Fuel Additives: Exposure to methylcyclopentadienyl manganese tricarbonyl (MMT) and mangafodipir for enhancing gasoline octane levels and improving anti-knock properties.
Recommended Medical Tests for Manganese Exposure
Pre-Placement Testing (within 3 months of potential exposure):
- Clinical examination
- Urine manganese level analysis
Periodic Testing (every 12 months):
- Clinical examination
- Urine manganese level analysis
9. Mercury or any of its compounds
Industries and Roles at Risk of Mercury Exposure
- Electrolytic Production: Manufacturing sodium hydroxide, chlorine, and acetic acid using a fluid cathode.
- Manufacture of Scientific Instruments: Including barometers, thermometers, electrical equipment (batteries, meters), mercury vapor and incandescent lamps, X-ray tubes, and radio valves.
- Amalgam Production: Manufacturing amalgams with copper, tin, silver, or gold, and solders containing lead and tin.
- Jewelry Plating: Gold, silver, bronze, and tin plating by jewelers.
- Paint and Pigment Manufacture: Involving mercury-based compounds.
- Tanning and Dyeing: Including felt-making.
- Chemical Catalysts: Mercury used in processes like producing acetic acid and acetaldehyde from acetylene.
- Taxidermy: Use of mercury in preservation.
- Photography and Photogravure: Involving mercury compounds.
- Mining and Extraction: Extracting gold and silver from ores.
- Laboratories: Handling mercury in scientific research.
- Dentistry: Use of mercury in amalgams.
- Brewery: Analysis for protein content in malt.
Organic Mercury Exposure
- Pharmaceutical Manufacturing: Production of antiseptics, germicides, diuretics, and contraceptives containing organic mercury.
- Pesticide Production: Including algicides, fungicides, and herbicides.
- Paint and Wax Manufacturing: Involved in antifouling paints, preservatives, latex paints, and fabric, paper, and wood fungus-proofing.
- Chemical Catalysts and Alkylating Agents: Use of organic mercury in the chemical industry.
Recommended Medical Tests for Mercury Exposure
Pre-Placement Testing (to be done within 3 months of potential exposure):
- Comprehensive clinical examination
- For inorganic mercury exposure: Estimation of urinary mercury
- For organic mercury exposure: Estimation of blood mercury concentration
Periodic Testing (every 12 months):
- Clinical examination
- For inorganic mercury exposure: Estimation of urinary mercury
- For organic mercury exposure: Estimation of blood mercury concentration
10. Organophosphates
Industries and Roles at Risk of Organophosphate Exposure
- Horticulture: Gardeners and greenhouse workers.
- Agriculture: Garden pest control operators and farmers.
- Vector Control: Operators involved in pest control.
- Chemical Formulation and Manufacturing: Production of organophosphate insecticides and sprays.
- Laboratory Work: Workers analyzing organophosphates.
- Packing and Redistribution: Distribution of organophosphates.
Recommended Medical Tests for Organophosphate Exposure
Pre-Placement Testing (to be done within 3 months of potential exposure):
- Comprehensive clinical examination
- Red blood cell acetylcholinesterase level test
- Plasma cholinesterase level test
Periodic Testing (every 6 months):
- Clinical examination
- Red blood cell acetylcholinesterase level test
11. Perchloroethylene
Industries and Roles at Risk of Exposure to Trichloroethylene (TCE)
- Dry Cleaning: Laundries using cleaning solvents.
- Metal Parts Cleaning: Degreasing and cleaning metal components in industries such as metalworking, automotive, aerospace, and shipbuilding.
- Optical Industry: Cleaning lenses in the optical sector.
Recommended Medical Tests for TCE Exposure
Pre-Placement Testing (to be done within 3 months of potential exposure):
- Comprehensive clinical examination
- Mid-week, end-of-shift urinary trichloroacetic acid (U-TCA) test + Liver function tests (including serum bilirubin, alkaline phosphatase, aspartate aminotransferase, alanine aminotransferase, and gamma-glutamyl transferase)
- For irregular or intermittent exposure, testing should be conducted at the end of the exposure period.
Periodic Testing (every 12 months):
- Clinical examination
- Urinary trichloroacetic acid (U-TCA) test
12. Cotton Dust
Industries and Roles at Risk of Exposure to Cotton Dust
- Textile Industry: Processing raw cotton, including carding, opening, spinning, winding, drawing, twisting, weaving, and harvesting. (Involves separating fibers and forming them into bundles of roughly parallel fibers.)
- Other Cotton Processing Industries: Activities like preparing substrates for mushroom cultivation using raw cotton.
Recommended Medical Tests for Cotton Dust Exposure
Pre-Placement Testing (to be done within 3 months of potential exposure):
- Clinical history and examination
- Pre-shift lung function test on the first day of the working week
- Post-shift lung function test (to be done after at least 6 hours of exposure on the same day)
Periodic Testing (every 12 months):
- Clinical history and examination
- Pre-shift lung function test on the first day of the working week
- Post-shift lung function test (to be done after at least 6 hours of exposure on the same day)
13. Silica
Industries and Roles at Risk of Silica Exposure
- Mining, Quarrying, and Tunneling: Activities involving siliceous rocks like granite, sandstone, slate, mica, and silica-containing ores.
- Abrasive Blasting: Using siliceous grains such as sandstone, sand, quartzite, and flint.
- Stone Work: Cutting, dressing, polishing, cleaning, and monument engraving (e.g., tombstones) using granite and sandstone.
- Construction: Tasks such as jackhammering and drilling through silica or silicon dioxide-rich materials like sand, sandstone, quartz, and granite.
- Refractory Maintenance: Repair and upkeep of furnace linings.
- Ceramics Manufacturing: Production of chinaware, porcelain, earthenware, and refractories.
- Foundry Work: Mould breaking and fettling.
- Rubber Milling: Milling processes using calcium carbonate-containing silica.
- Enameling: Using quartz, feldspar, metal oxides, and carbonates in enameling processes.
- Abrasive Soap Manufacturing: Creating abrasive soaps.
Recommended Medical Tests for Silica Exposure
Pre-Placement Testing (to be done within 3 months of potential exposure):
- Comprehensive clinical examination
- Full-size chest X-ray
Periodic Testing (every 36 months):
- Clinical examination
- Full-size chest X-ray
14. Tar, Pitch, Bitumen & Creosote
Industries and Roles at Risk of Exposure to Hazardous Materials
- Manufacturing of Coal Tar and Related Products: Involving industries such as coke oven operations, bitumen, creosote, and pitch production.
- Coal Gasification: Processes involved in the conversion of coal into gas.
- Coke Production: Activities related to the creation of coke from coal.
- Waterproofing and Material Production: Making roofing materials, insulation, and waterproofing wood products.
- Lining Irrigation Canals and Reservoirs: Activities involving the lining of water systems with hazardous materials.
- Dyestuff Manufacturing: Involves products like carbon black and paints.
- Chemical Feedstock Production: Creating chemicals such as benzene, toluene, xylene, and phenol.
- Sealing Agents: Used in industries like battery manufacturing.
- Lubricants for Die Moulds: Chemicals used in die-casting operations.
Recommended Medical Tests for Exposure to Hazardous Materials
Pre-Placement Testing (within 3 months of exposure):
- Comprehensive clinical examination
Periodic Testing (every 12 months):
- Clinical examination
15. Trichloroethylene
Industries and Roles at Risk of Exposure to Solvents
- Metal Fabrication, Automotive, Aircraft, and Aerospace: Workers involved in vapour degreasing and cold cleaning of metal parts.
- Optical Industry: Using solvents for cleaning lenses.
- Wax, Fat, Resin, and Oil Extraction: Solvent use for extracting these substances.
- Printing and Coating Industries: Solvent use in inks, varnishes, adhesives, paints, lacquers, rug cleaners, and disinfectants.
Recommended Medical Tests for Solvent Exposure
Pre-Placement Testing (to be done within 3 months of potential exposure):
- Comprehensive clinical examination
- Urinary trichloroacetic acid test
- Liver function tests
Periodic Testing (every 12 months):
- Clinical examination
- Urinary trichloroacetic acid test
16. Vinyl Chloride Monomer
Industries and Roles at Risk of Vinyl Chloride Exposure
- Polyvinyl Chloride Resin Production: Workers involved in cleaning and maintaining reactors, who face a higher risk.
- Vinyl Chloride-Vinyl Acetate Copolymer Production: Workers engaged in the production of these copolymers.
- Vinyl Chloride Monomer Storage: Personnel managing the storage of Vinyl Chloride Monomer.
- Sampling and Analysis of Vinyl Chloride Monomer: Workers conducting sampling and analysis of the monomer.
Recommended Medical Tests for Vinyl Chloride Exposure
Pre-Placement Testing (to be done within 3 months of potential exposure):
- Comprehensive clinical examination
- Liver function tests
- Hepatitis B and C serology
Periodic Testing (every 12 months):
- Clinical examination
- Liver function tests
Frequently Asked Questions About Occupational Health Services
What Is Occupational Health?
Occupational health focuses on the prevention, diagnosis, and treatment of work-related health conditions. It involves regular assessments to ensure employees’ well-being and safety in their workplace.
Why Is Occupational Health Screening Important For Businesses?
Occupational health is vital to ensure the safety, productivity, and overall health of employees. It helps businesses comply with regulations, reduce workplace injuries, and maintain a healthy work environment, leading to higher employee morale and lower absenteeism.
What Types Of Medical Tests Are Included In Occupational Health Services?
Occupational health services include a range of medical tests, such as clinical exams, hearing tests, vision tests, lung function tests, and screenings for work-related diseases like asbestosis or vinyl chloride exposure.