Protecting employee health starts with the right expertise.
Specialist occupational hygiene services – from air monitoring and noise surveys to LEV assessments and COSHH support. Reliable, responsive, and trusted by leading UK companies to reduce exposure risks and safeguard worker health.
Air Monitoring
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Noise Surveys
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LEV Testing
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COSHH Support
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Air Monitoring • Noise Surveys • LEV Testing • COSHH Support •
When you're responsible for worker health, uncertainty isn’t an option.
People rely on you to get it right – timely, clearly, and without excuses. You know action is needed – but not all providers offer the technical detail, clear communication, or turnaround time you need. Poor reporting delays progress. Vague recommendations increase your workload. Some don’t return calls. Others leave you chasing a report months later with no update.
Sound familiar?
We hear it time and time again.
Delayed reports and missed deadlines.
Vague advice with no clear actions.
Unresponsive providers with poor communication.
Your clients, your team, and your leadership need clarity. You need partners you can rely on.
OHSL removes the guesswork.
We deliver clear data, timely answers, and practical advice – so you stay informed, supported, and in control from start to finish.
Independent. Experienced. ISO 9001 Certified.
Meet Your Occupational Hygiene Partners.
OHSL was founded by three senior occupational hygienists – Gareth Ison, Helen Thomas, and Andy Wallace – with over 60 years of combined experience. Our work spans air monitoring, noise exposure, LEV assessments, and hazardous substance control – all delivered with technical accuracy and practical insight.
We know how frustrating it is to work with providers who overcomplicate, overcharge, or under-deliver. We don’t offer box-ticking exercises. We work with you to protect people’s health, demonstrate best practices, and stay ahead of risk.
Here’s how we work
You won’t be left guessing. Our process is thorough, communicative, and built around helping you act with confidence.
You make an enquiry
We would love to help. Get in touch with the issue you’re facing.
We’ll define the scope
We’ll work together to shape a clear and targeted action plan.
We’ll assess
on site
Hazard evaluation and control assessments by qualified hygienists.
We’ll report and advise
Clear results, actionable steps, and a reliable turnaround.
“We have built a strong relationship with OHSL over the past 15+ years and have found them to be a very professional and supportive company.
Customer service is excellent; monitoring proposals and dates are easily agreed, the on-site activities are conducted with minimal interference or disruption to production and reports are written to a high professional standard. They are approachable and feedback from our employees is always positive. We would not hesitate to recommend OHSL to any employer, large or small.”
Comprehensive occupational hygiene services tailored to your workplace.
If you’re not sure which service applies – we’ll help you identify the hazards, define the risks and prioritise what matters.
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Support tailored to your processes, facilities, and budget.
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Compliant with Control of Noise at Work Regulations.
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Thorough examination and testing and reporting for local exhaust systems.
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Advice and assessment to meet internal and external expectations.
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Support tailored to your processes, facilities, and budget.
Clarity over risk, always. Working with OHSL means:
✔ Knowing exactly where you stand on workplace health risks.
✔ Having practical actions you can explain and implement.
✔ Being supported by people who care about outcomes – not box-ticking.
✔ Keeping stakeholders informed with clear, timely data.
Working with the wrong provider means delays, missed issues and unclear reports – and the real risk of people being exposed while you're still waiting for answers.
We help you stay in control, protect your team, and act with confidence. Talk to us directly at mail@ohsl.co.uk or get in touch via our form below.
Let’s identify your risks and get you moving.
We’ll ask the right questions, plan the work carefully and make sure you have the information you need to act with clarity.