Water Chlorination Certificate Services

Water Chlorination Certificates | BS8558:2011 | New Supply Pipework

Water Chlorination Certificate Services


What is a water chlorination certificate and is it different to a disinfection? A water chlorination certificate proves to the local water company or body that you have chlorinated your water system, be it a short length of pipe or a full system and that it is ready to use. A disinfection or chemical disinfection is the same thing. Having a chemical disinfection means you are disinfecting the water system with a chemical, normally chlorine. This is where the term chlorination derives.

When do I need a chlorination certificate?


Where necessary, hot and cold water services should be cleaned, flushed and disinfected in the following instances, as specified in BS 8558:2011:


  • New water system installations or refurbishment of hot and cold water systems;
  • Installation of new components;
  • Systems that have been out of use for long periods of time;
  • Evidence of contamination or stagnation in tanks;
  • Substantial alterations to the systems;
  • Following sample results indicating contamination;
  • During or following an outbreak of legionella;
  • Where indicated by the risk assessment.


If you are uncertain on the actions you need to take then contact our team today.

What type of chlorination services are there?


There are a number of reasons why you might need a chlorination, below are the most common reasons for disinfections:


  • New water supply pipework to property
  • New installation to commercial water systems
  • System chlorination due to positive bacteria results

What happens during a chlorination?


RAMS issued

Water Flush

Water Flush

Water Sampling

Chemical Disinfection

Certificate Sent

How much does a water chlorination service cost? 


Water chlorination services costs vary in price depending on the size of your water system to be chlorinated. Services normally range between £300-£1500+ depending on the requirements and size of the water system.

About water chlorination services and how long will it take?


uRisk’s water chlorination services are carried out by our fully trained engineers, provided with RAMS, method statements and procedures to ensure the work complies with the ACoP L8 (HSG 274) and COSHH regulations. Disinfection works are carried out with the use of chlorine with all RAMS designed to ensure the safety of the water system’s users is paramount.

On average it can take our experience engineers between 3-5 hours to chlorinate your water services. However, the time taken to clean the tank often depends on: how dirty the water system is, how accessible the system is and so on.


What are the water authority specifications?


Every local water authority has different water chlorination specifications. However, the following is a standardised list of the most commonly required features:

  • Flushing/Swabbing
  • Chlorine Level
  • Chlorine Contact Time
  • Microbiological and chemical analysis

We use specialist equipment to ensure accurate dosing to all of the ingoing water whilst ensuring no possibility of back flow contamination.

Can water sampling or testing be included in the water chlorination service?


Yes, water chlorination services can include water sampling from UKAS accredited laboratories. Local water companies normally ask that you provide water sample results for the following: TVC @22°C, TVC @37°C, E.Coli, Coliforms, Total Chlorine, Free Chlorine, Turbidity/Clarity.

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

water quality monitoring


Customer Service

water quality monitoring



water quality monitoring



Legionella Control Services


Sales Manager

Chlorination Certificate FAQs

Do I require samples for my chlorination?

Typically yes, if you have been instructed to undertake a chlorination or water disinfection, then it is likely you will require water analysis or testing of the water quality to confirm the pipe work is clean and clear of bacteria or other contaminants.

Can sampling be included in the service?

Absolutely, they can be included with the chlorination service. Please note that samples are not included as standard because there are many different standards to adhere to, so we prefer to understand your sampling requirements prior to provide a more accurate quote and service.

Is the disinfection or chlorination guaranteed to work?

Unfortunately no. Micro-bacteria and pathogens can work in mysterious ways, but rest assured you’re in good hands. Our experienced team will complete tasks as per industry guidelines in order to provide the best possible outcome on each disinfection.

Is it safe to use my water until the chlorination?

The guidelines when bacteria is present becomes a little hazy. Our recommendation is simply to avoid using the water and remove the risk entirely until water safety is confirmed. Until then, there are filtration alternatives to help reduce and remove the risks as a temporary fix until a resolution is found.

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.

My first time using Urisk for work at multiple sites. Daniel was absolutely brilliant, polite and professional. Highly recommended! 🙂
Claire Keay
Claire K.
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 P.
Daniel did the testing today at PGHC He was really efficient, friendly and so professional. An absolute pleasure to deal with. Thanks Daniel
Lorraine Carruthers
Lorraine C.
Really easy to organise a risk assessment to be carried out at our offices and have had great help from them since to implement the necessary changes to keep the office safe. Would definitely recommend.
Holly Ferguson
Holly F.
Richard & Nick are great. Really good work and nice people.
Joshua Ballard
Joshua B.
We have been working with Urisk for best part of year now. I could not recomend their services highly enough. They always promptly respond to our requests promptly and manage the job from start to finish seamlessly. I would highly recommend.
Sam Guest
Sam G.
My experience with URisk Water Hygiene from my initial enquiry, to their site visit to undertake a Legionella Water Risk Assessment at my office (MDG), to providing me with the report and aftercare has been superb! Efficient response times, excellent customer service, friendly, helpful advisors and assessors who are always ready to help and provide guidance. An absolute pleasure to deal with, I highly recommend!
Lauren Wakeman
Lauren W.
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 P.
Extremely happy with our legionella risk assessment carried out by uRisk, easy to understand and great customer service. Thanks again
Nickayla Robertson
Nickayla R.
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 T.
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 P.
This is by far the best service I have received in a long time.Lloyd who we spoke to was super helpful and very thorough with everything.I would def recommend using this company, they are not just out for money they put their customers needs first.Thank you
Coral Dawkins
Coral D.
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 M.
Brilliant service! Thanks a lot for the hard graft
Leon Macauley
Leon M.
Brilliant Service, efficient, professional, punctual and friendly.
Alex Windsor
Alex W.
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 G.

We want to help you comply!