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Monday – Friday 08:00 – 17:00

National Hygiene Services, part of the RJ Urmson Group core business activities are maintenance, survey, testing and treatment of commercial and domestic water systems including chlorination, pre-commissioning chemical cleaning and legionella risk assessments

We offer a level of expertise that benefits a vast range of sectors including healthcare, education, offices, retail, manufacturing, commercial and residential buildings.

Quality Guarantee

Quality is paramount in what we do. Our engineers carry out all works to BSRIA, CIBSE, BSI and ACoP L8 HSE guidelines

Why choose us?

Over 30 years of satisfied customers, bespoke service suited to your requirements, national coverage, fully insured and nationally accredited Quality Management System ISO 9001:2015

Our values

We have three core values that inform our behaviour and approach to work: to Excel, Challenge and Inspire

We Are Recruiting! Take A Look At Our Latest Career Opportunities

What services do we offer?

Whatever your water treatment requirements are – maintenance, survey, testing and treatment of commercial and domestic water systems including chlorination, pre commissioning chemical cleaning and legionella risk assessments – contact us on 01257 262 683 to see how we can assist you or click below for further details:

Work & Projects

  • Fact: Chlorination is used to prevent the spread of waterborne diseases such as cholera, dysentery, and typhoid Domestic water disinfection is the process of ...

  • Legionnaires' disease is a potentially fatal form of pneumonia caused by the inhalation of small droplets of contaminated water containing legionella. All man-made hot ...

  • Shower heads deliver water at around 45°C, making them a potential breeding ground for bacteria such as legionella. Limescale is a nutrient, and under the ...

  • TMV or Thermostatic Mixer Valve is a device that is designed to control water temperature for showers, baths and outlets. These devices require servicing on ...

  • All newly installed closed systems, LTHW / LPHW, MTHW, HTHW; chilled water and condenser water circuits should be pre-commission cleaned in line with BSRIA BG ...

  • Chemical dosing treatment is the treatment of closed water systems (CWS) found in many commercial and multi residential properties. These systems provide the heating and ...

  • Domestic water system quality refers to the chemical, physical, biological, and radiological characteristics of water. It is a measure of the condition of water relative ...

  • FACT: Temperature can increase during summer months, taking it above the acceptable temp of 20°C, extra checks may be required Cold water storage tanks (CWST) ...

  • Acid descaling treatment is used to increase efficiency, it is estimated that 1.5mm of scale in a hot water cylinder will reduce efficiency by up ...


“ADT Energy has taken great pleasure in contracting RJ Urmson Group in a number of applications of varying sizes. RJ Urmson Group have been very accommodating with all of ADT’s requirements and requests. Detailed certification and documentation for works carried out have always been issued promptly. Their engineers have always conducted themselves in a friendly and professional manor and their workmanship is of the highest standard. I would happily recommend RJ Urmson Group to any potential client requiring their services”

James Roxburgh
Project Manager
ADT Energy

“Due to programme constraints, a number of other factors it were always going to be a challenging project, and it’s been a huge achievement to get to where we are at. Kirk and his guys came into a pressurised situation but still managed to put in as much effort as possible and carried out their works to an extremely high standard which was also noticed by the clients’ consultant when the witnessing was carried out without any issues. Arthur McKay & ISG really appreciate the efforts Urmson LLP put in, as it helped push the job across the line”

Martin Kerr
Project Manager
Arthur McKay Building Support Services

Interested? Get in touch for a quote!

RJ Urmson Group Accreditations