Our Bedford laboratory partnered with Atkins to deliver comprehensive water quality analysis—processing thousands of samples and pioneering ultra‑trace PFAS testing to help Thames Water and Severn Trent ensure safe, resilient water supplies.
Challenge
Thames Water and Severn Trent Water, together provide clean water solutions to almost 20 million customers, from the Midlands and Wales to London and the Thames Valley. OFWAT, the water regulator for England and Wales, is working hard to ensure water resource supplies are resilient against droughts. Climate change, population growth, societal expectations and increasing environmental aspirations are all making this more challenging.
In response to this challenge, they have identified the potential for water companies to jointly deliver strategic water resources on behalf of customers, while also protecting the environment.
Solution
Working in partnership with Atkins, we coordinated collection and delivery of all sample media. Water samples were collected from several rivers, reservoirs, and canals across the UK, by taking samples from a range of catchments helps to identify and pinpoint the presence of specific contaminants.
Our state-of-the-art laboratory in Bedford, provided comprehensive analysis of various parameters, including priority pollutants and emerging substances. Both are a growing concern due to their toxicity potential to aquatic organisms and the effect they can have on human health.
Over the last 3 years, we have received over 3,000 samples for analysis, and have completed over 201,000 individual tests. The type of analysis ranged from simple inorganics, such as metals, to very complex trace organics, such as sub nanogram levels in PFAS.
With its state-of-the-art equipment and extensive experience, the Tetra Tech’s Bedford laboratory has been supporting the UK water industry for over 10 years. We continue to invest in our people and our facilities to ensure we consistently provide our clients with quality analysis. We remain at the forefront of trace analysis at ultra-low levels including the forever chemicals.
Jonathan Tucker, Divisional Director
Result
After successfully completing and submitting results, we have extended our contract with Atkins until the end of 2022. We aim to continue providing high-level consultancy, particularly on emerging substances. We strive to push the boundaries for limits of detection and types of analysis, which will include the ‘forever chemicals’ such as PFAS (Perfluoroalkyl-and polyfluoroalkyl substances).
We can carry out analysis of PFAS chemicals in line with the European Drinking Water Directive list of 20 and the UK Drinking Water Inspectorate list of 47, now extended to include 51 targeted PFAS chemicals as 0.1ng/L.
Our quality and experience
Tetra Tech has been accredited for a range of PFAS analysis since 2005 and has years of expertise in analysing chemicals at ultra-low levels. This includes 12 years producing data analysis for the UK Chemical Investigation Programme, as well as years of successful participation in external Performance Testing in schemes such as AQS, Aquacheck and Quasimeme.
What our clients say
Helen Withers, Practice Manager at Atkins had this to say about our efforts on this project:
“We have been working closely with Tetra Tech’s Bedford laboratory for a comprehensive and complex water quality analysis service. Analytical suites have been created to provide cutting edge scientific analysis with cost effective solutions for multiple stakeholders and projects.
These projects have been geospatially and logistically challenging, but with excellent communication and agility, Tetra Tech have been a great support and made tough challenges possible, their technical excellence has been a benefit for our projects, and ultimately for our clients.”
Benefits
- 3,000 samples received for analysis
- 600,000 tests completed
- 3-year project duration
- 16 expert extractors and analysts involved
At a glance
Client
Multiple Atkins
Location
UK-wide
Services
Analytical solutions, consultancy services
The project featured in this article was undertaken by RPS, A Tetra Tech Company and originally published on RPSgroup.com. In March 2026 RPS rebranded to Tetra Tech.