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

To get a quote you can phone, email or complete our ‘Get a Quote!’ form to receive a quotation within 24 hours.

Book an Appointment

Once you’re happy with your quote we’ll confirm a suitable date and estimated time of arrival for your appointment.

Your Appointment

An engineer will be with you on your scheduled date, and will call you prior to arrival (when safe and possible).

Report & Support

Our team will quality assess your report for PDF distribution, typically within 2-10 days of the site visit.

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 wait for payment.

Your dedicated water hygiene team

Legionella Monitoring


Customer Service

Legionella Control


Quality Control

water hygiene monitoring



Legionella Control Services

Luke V

Business Manager

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.

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
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 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
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
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
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
Brilliant service! Thanks a lot for the hard graft
Leon Macauley
Leon Macauley
21:12 15 Jan 19
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

We want to help you comply!