Water Hygiene & Legionella Control in Derry and the West
Water Hygiene & Legionella Control for offices, shops, schools and industrial units throughout Derry and the West: Derry~Londonderry, Omagh, Enniskillen, Coleraine and beyond.

What is water hygiene and legionella control?
Water hygiene is the control of Legionella and other bacteria in a building's hot and cold water systems. It starts with a Legionella risk assessment, followed by a written scheme of monthly temperature checks, flushing of little-used outlets and periodic cleaning.
What is included in Derry and the West?
- Legionella risk assessment and written scheme
- Tank inspections, cleaning and disinfection
- Weekly flushing of little-used outlets
- TMV servicing and shower head descaling
- Monthly sentinel tap temperature monitoring
Rules that apply in Northern Ireland
The HSE Approved Code of Practice L8 and HSG274 set out how duty holders must assess and control Legionella risk. Hot water should be stored at 60°C and distributed at 50°C or above, with cold water below 20°C. In Northern Ireland, fire safety in workplaces is governed by the Fire and Rescue Services (Northern Ireland) Order 2006 and the Fire Safety Regulations (Northern Ireland) 2010, with health and safety enforced by HSENI rather than HSE.
Water Hygiene & Legionella Control prices in Derry and the West
| Example site (Derry and the West) | Guide price per month |
|---|---|
| Small office, about 2,000 sq ft | £40 – £60 |
| Medium office, about 10,000 sq ft | £40 – £120 |
| Large office, about 40,000 sq ft | £150 – £450 |
Guide prices for water hygiene and legionella control only, excluding VAT, based on 2026 UK market rates. Your fixed price follows a free site survey.
Towns we cover in Derry and the West
Questions from Derry and the West customers
What are sentinel outlets?
The taps nearest to and furthest from the water heater or tank. Checking their temperatures monthly shows whether the system is in control.
How often is the risk assessment reviewed?
Whenever something significant changes, and at regular intervals. Many organisations review every two years.
Which towns in Derry and the West do you cover?
We cover Derry~Londonderry, Omagh, Enniskillen, Coleraine, Dungannon, Limavady, plus the surrounding towns and business parks.
Is pricing different in Derry and the West?
Prices in Derry and the West follow our standard UK rates, confirmed after a free site survey.
Other services in Derry and the West
Get a fixed-price facilities proposal
A free site survey, a written specification and a monthly price, with no obligation.