







Both COSHH monitoring and health surveillance are requirements under the COSHH Regulations 2002, but they serve different purposes.
| Feature | COSHH Monitoring | Health Surveillance |
|---|---|---|
| Focus | Exposure levels in the environment | Workers' physical health |
| Method | Air sampling and measurements | Medical checks or screenings |
| Goal | Ensure controls keep exposure below limits | Detect early signs of ill health |
| Trigger | Use of hazardous substances with WELs or uncertain control | Use of substances known to harm health (e.g. sensitizers, carcinogens) |