Water Testing, Analysis & Sampling

Water Testing | Water Hygiene | UKAS Laboratories

Water testing, analysis, sampling


uRisk provides water testing, analysis and sampling for a wide range of bacterias from all ranges of water systems including: drinking water, hot and cold domestic supply, cold water storage tanks, swimming pools and spa’s, closed systems, lakes and reservoirs and anywhere else there is water.

Water testing, analysis, sampling strategy


Water testing appears to be a simple process of filling a sample bottle, but it can become extremely problematic as the method and process of sample taking can have an important effect on the final sample results.

For instance, there are two types of sampling. Pre-flush and post-flush. A pre-flush is a sample taken before the tap is flushed, and a post-flush is a sample taken after the tap is flushed. Depending on how long the tap is run will determine how far into the system the sample is taken from. This is why all sampling should be undertaken in accordance with BS 7592 as a simple change in how the sample is taken can have a significant impact on the results.

Also, it is important not to mix samples from two taps into a single bottle. This will dilute any positive results. It is also more costly should you have a positive because you will need to take further water samples to identify where the bacteria is present.

The appropriate techniques must be used to ensure the validity of the sample results. These techniques may include:


  • Appropriate use of PPE
  • Sampler cleanliness
  • Cross contamination
  • Speed of delivery from time taken to delivery to laboratory

Water systems we sample


  • Drinking Water (including water dispensers and coffee machines)
  • Hot and Cold Water Systems
  • Cold Water Storage Tanks
  • Hot Water Cylinders
  • Water Heaters
  • Dental Units
  • Swimming Pools
  • Spa Baths
  • Cooling Towers
  • Eye Showers
  • Eye Wash Units
  • Fountains and Features
  • Vending Machines
  • Closed Water Systems

Microbiological Testing


Total Viable Count (TVC)

Pseudomonas Aeruginosa




Chemical Testing




Dissolved Oxygen




Total Dissolved Solids (TDS)



Physical Testing

Effluent Analysis


Suspended Solids




Why carry out routine water sampling?


Routine water sampling is the most effective way to determine water quality. Without water testing, analysis, sampling you are unable to identify water quality and therefore you are unable to determine whether your water management and legionella control is sufficient.

With periodic water testing you are able to demonstrate that your water management and legionella control procedures are suitable and the water in your water system is fit for purpose.

All our water samples are tested in UKAS accredited laboratories as standard. We are able to carry out tests on a wide range of microbiological samples and chemical testing services.

Flexible Water Sampling Services


uRisk provides a range of water sampling services from DIY test kits to one off sampling services (where a trained engineer carries out the sampling) or a routine water sampling programme carried out by trained engineers.

All sampling visits are inclusive of full water system inspections, results explanation, recommendations and certification.


Water Sampling Bottles


Water sampling bottles are sterile bottles treated with sodium thiosulphate which aims to neutralise the effects of residual chlorine in the sample bottle.

All samples should be labelled with the sample number, date, sample type, company name, sample location, sample system (hot or cold), water temperature. Chemical samples will also need to be taken using the appropriate bottles.

Water Sampling Competence


All water hygiene engineers have been trained to take samples in a manner that is least likely to contaminate the sample. It is important that the person undertaking sampling has been trained and is competent in sample taking.

There is more to sampling than filling up a bottle of water. The sample locations are crucial to ensure a true representation of your water system is analysed. Pre and post flush sampling can impact your results. Knowing whether the sample should be taken immediately (pre-flush) or if a sample should be taken post-flush can have an important impact on the results too. Contamination may also impact your sample results and water system if incorrectly taken.


Service Process

Get a Quote

Get a quote today by phone, email, or complete our contact form to receive a quotation within 24 hours.


Our coordinator will be in touch to confirm a Date That Suits You, along with estimated time of arrival.

Your Appointment

On the day of your appointment, you will receive a 30 min Curtesy Call from an engineer to confirm they're on route.


Your report is then Quality Checked and emailed in PDF Format, with Next Day Delivery.

Support Call

Our support team will be in touch to arrange your free 30 min Support Call to help explain your report.

All payments are due prior to booking completion unless agreed in writing for 30 days from the date of invoice. We will hold your booking time for 24 hours whilst we await payment. Reports are typically next day delivery, but please allow for up to 5 working days delivery.

Your Dedicated Water Hygiene Team

Legionella Monitoring


Customer Service

Legionella Control Services



Legionella Control


Quality Control

water hygiene monitoring



Legionella Remedial Work FAQs

Do uRisk provide ongoing sampling contracts?

Yes we do. We can provide ad-hoc water sampling/analysis or ongoing sampling as part of a contract so that you don’t need to worry about your next visit, helping you to stay compliant with up to date feedback on your legionella control and management.

Are uRisk qualified?

Yes, all of our assessors are fully qualified and accredited by City & Guilds legionella control association and can help assist you in meeting compliance today for HSE (ACoP L8), and provide landlords with guidance for hot and cold water low risk systems. We are also Safe Contractor and Construction Online approved so you can rest assured that you are working with a trusted water hygiene service provider who put health and safety first.

All our engineers are DBS Checked to ensure suitable people are entering your premises and to safeguard vulnerable people. We are committed to maintaining the highest standards.

Do uRisk service my area?

Yes, our services are nationwide. Whether you have one or multiple water systems and one or multiple sites, we provide services across the country, with qualified engineers scattered throughout the UK and offices based in Hertfordshire which is a 30-minute train journey to London King’s Cross. Get in contact with us and book an appointment where we can carry out a legionella risk assessment. We will look at factors like your water temperature, redundant pipework, where your water is stored and test for bacteria in water systems.

Why choose uRisk?

25 Years Experience

Over 25 years of water hygiene and legionella control experience.

Customer Service Excellence

Friendly and simple advice by phone, email & online at your convenience.

City & Guilds Qualified

All staff are trained water hygiene consultants and engineers.

Nationwide Coverage

With engineers located all across the UK, we're never too far away.

UKAS Accredited Testing

Our labs are UKAS approved providing you with quality assurance.

Full Compliance Services

Your one stop shop for Legionella control, no need to go elsewhere.

Extremely happy with our legionella risk assessment carried out by uRisk, easy to understand and great customer service. Thanks again
Nickayla Robertson
Nickayla Robertson
21:22 15 Jan 19
uRisk have been helping us with our Legionella Control for a number of years now. We've recently had a CQC audit and they were very impressed with our legionella compliance! Thank you for all your help.
Mike Port
Mike Port
20:41 07 Aug 18
Brilliant company, customer service was great! And engineers were fantastic. Thanks again uRisk! Will definitely be using them for all future work.
Nikesh Gohil
Nikesh Gohil
12:49 12 Mar 18
Brilliant service! Thanks a lot for the hard graft
Leon Macauley
Leon Macauley
21:12 15 Jan 19
Brilliant Service, efficient, professional, punctual and friendly.
Alex Windsor
Alex Windsor
18:21 15 Jan 19
Fantastic training courses and we've found the legionella risk assessment very easy to read and far more detailed than any we have previously had. 5 star service!
Gemma Pond
Gemma Pond
20:37 07 Aug 18
A fabulous company, excellent customer service, they try to accommodate appoitments, and do there utmost in emergencies, been with them a few years now,  honestly cant fault them. Coming out of Covid 19, having our building urgently disanitised,  big thank-you to Luke and Lee for staying so late to get the job done!! Thank you Devon, for juggling the diary to fit us in so soon. A Team 🙂
Jo Maskell
Jo Maskell
18:02 15 Jun 20
We're a small GP practice and started using uRisk for legionella risk assessments. We opted to use their remedial and monitoring services and they've been absolutely great. We cannot recommend them enough! Thank you so much!
Amanda Pates
Amanda Pates
18:30 07 Aug 18
Incredibly detailed and professional team. Have been beyond helpful with with our CQC legionella compliance for our Safety. They’ve found solutions to fit around how we work and our budgets. We are always advised with reference to HSE which has been brilliant.
Amy Thorne
Amy Thorne
20:29 07 Aug 18

We want to help you comply!