NOSA Occupational Hygiene Certified Services
Protect your workforce and stay compliant with South Africa’s occupational hygiene regulations.
At NOSA, our occupational hygiene services are delivered through Aspirata Auditing Testing and Certification (Pty) Ltd — a SANAS-accredited Occupational Hygiene Inspection Body (OH0246) and a Department of Employment and Labour (DoEL) Approved Inspection Authority (OH0246 – CI 067) for occupational hygiene.
Our goal is simple: to help you prevent occupational disease by identifying and monitoring health risks before they impact your employees.
Why Occupational Hygiene Matters
Under the Occupational Health and Safety Act (Act 85 of 1993), every employer has a legal responsibility to protect their employees from health risks in the workplace. That includes proactively identifying, measuring, and managing potential exposures to harmful agents, substances, and conditions.
The occupational hygiene process typically follows these steps:
- Health Risk Assessment
Identify processes, activities, or agents that could lead to ill health or occupational disease. - Exposure Monitoring
Quantify employee exposure to identified risks through formal Occupational Hygiene Surveys. - Review and Control
Use results to determine compliance and implement practical workplace controls for continuous improvement.
Occupational Hygiene Surveys
A critical part of compliance, control, and continuous improvement Occupational Hygiene Surveys are formal assessments used to evaluate worker exposure to health hazards such as noise, hazardous chemical agents, thermal stress, vibration, and ventilation.
Some surveys may require the involvement of an Approved Inspection Authority (AIA), depending on legal and industry-specific requirements.
At NOSA, we offer comprehensive hygiene surveys tailored to your specific industry risks and working environment, including noise, illumination, thermal stress, hazardous chemical agent exposure, and vibration.
Our surveys are conducted in line with applicable SANS standards and relevant industry guidelines or best practices. You’ll receive a detailed technical report outlining compliance status, measured exposure levels, and actionable recommendations to support continuous improvement.
When are Occupational Hygiene Surveys required?
Surveys may be required:
- At least once every two years for certain regulated hazards
- Whenever workplace processes or conditions change significantly
- Following a health risk assessment that identifies new or ongoing hazards
Need to update your surveys or unsure whether your current documentation meets compliance standards? Contact us to schedule an assessment.
A Legally Compliant, Expert-Driven Approach
Our highly skilled and professional team supports your compliance with South African occupational hygiene regulations. We don’t just identify risks — we offer clear, practical recommendations to help you address non-compliances and continuously improve your workplace health standards.
Whether you operate in manufacturing, food production, healthcare, or logistics, we tailor every quotation to your specific risk profile and operating environment.
Our Occupational Hygiene Services
| Service
|
Legal Reference
|
Legislated/Proposed Frequency Or sooner if there has been a change in process, production, activities, after accident or incident |
Who May Conduct Service
|
| WORKPLACE ASSESSMENTS | |||
| Occupational Hygiene Risk Assessment | OHSA 8 | 24 Months | Legislated Competent Person |
| Hazardous Chemical Substance Risk
Assessment |
OHSA 8
HCS 5 |
24 Months | Legislated Competent Person |
| Asbestos Risk Assessment & Inventory | AR 14 | 24 Months | Legislated Competent Person |
| Ergonomics Assessments | ER 6 | 24 Months | Legislated Competent Person |
| WORKPLACE SURVEYS | |||
| Noise Surveys
– For Hearing Conservation Purposes: Demarcating Noise Zones and /or – Personal Exposure Monitoring |
NIHL 7 & 9 SANS 10083 |
24 Months
|
Legislated AIA |
| Illumination Surveys
– Daytime and/or – Night time |
ERW 3 SANS 10114-1 |
24 Months |
Legislated Competent Person |
| Emergency Illumination Surveys | ERW 3(4) & 3(5)(C) SANS 10114-2 | 3 Monthly | Legislated Competent Person |
| Ventilation & IAQ Surveys | ERW 5 HCS
SANS 10400 |
24 Monthly | Legislated Competent Person |
| Local Extraction Ventilation Surveys
– Spray Booths – Fume Cupboards – LEV Hoods, etc. |
HCS 12 GSR 4 |
24 Monthly |
Legislated AIA |
| Hazardous Chemical Substances Surveys
– Air Monitoring of wide variety of chemicals |
HCS 6 LR 7 |
12 Monthly for a HCS with an OEL – Control Limit
24 Monthly for a HCS with an OEL – Recommended Limit |
Legislated AIA |
| Thermal Stress Surveys
– Heat Stress – Cold Stress |
ERW 2 |
24 Monthly |
Legislated Competent Person
|
| Vibration Surveys
– Whole Body and/or – Hand Arm Vibration Surveys |
OHSA 8 |
24 Monthly |
Legislated |
| Facilities and Hygiene Surveys | FR
SANS 10400 |
24 Monthly | Legislated Competent Person |
| Potable Water Sampling | FR 7
SANS 241 |
24 Monthly | Legislated Competent Person |
| Hazardous Biological Monitoring (swab sampling and air plates) | HBA 7 | 24 Monthly | Legislated Competent Person |
Acronyms
AR Asbestos Regulations
ERW Environmental Regulations for Workplaces
FR Facilities Regulations
GSR General Safety Regulations
HBA Regulations for Hazardous Biological Agents
HCS Hazardous Chemical Substance Regulations
LR Lead Regulations
NIHL Noise Induced Hearing Loss Regulations
OHSA Occupational Health and Safety Act, 85 of 1993
SANS South African National Standard
ER Ergonomics Regulations
Additionally, NOSA can also assist companies in limited environmental monitoring surveys, supported by our chemistry laboratory capabilities.
The services include:
| Service
|
Legal Reference
|
Legislated/Proposed Frequency Or sooner if there has been a change in process, production, activities, after accident or incident |
Applicable to this site
|
| ENVIRONMENTAL MONITORING | |||
|
Environmental Noise Surveys |
Environmental Conservation Act and Local By-Laws | Annually | Competent Person |
| Environmental Dust Fallout Surveys | National Environmental Management: Air Quality Act and National Dust Control Regulations | Annually | Competent Person |
| Effluent Water and Storm Water Sampling | National Water Act and Local By-Laws | Specific permit requirements | Competent Person
|
| Soil Sampling | The National Environmental Management: Waste Act | As required especially after any environmental incidents | Competent Person |
Ready to Get Started?
Join the growing number of companies using NOSA 5 Star Audits to drive true HSE excellence.
Complete the form below to book your Occupational Health, Safety and Environmental Audit.
Contact Information
Block E, Lakefield Office Park,
84 Lenchen Ave,
Die Hoewes,
Centurion,
0163,
South Africa