Legionella risk assessment in Grimsby

Updated 15 September 2026

Grimsby's seafood processing cluster is one of the largest in Europe, and its factories, cold stores, and dockside operations run washdown, hygiene, and process water systems on a scale unusual for a town of its size. The Diana, Princess of Wales Hospital provides the main healthcare site, while the port's offshore-energy support activity has brought new industrial and office premises along the docks. Housing includes extensive older terraces and former council estates now widely privately rented, giving landlords clear duty-holder responsibilities. Hot and cold services in food premises need documented control regimes that satisfy both water hygiene and food-safety expectations.

Local water supply

The mains water supplier for Grimsby is Anglian Water (Anglian Water website). The mains supply is treated and controlled by the supplier, so your legionella duties begin where the water enters your premises. Anything downstream of the boundary stop tap (storage tanks, calorifiers, pipework, outlets) is your responsibility.

Anglian Water describes the water it supplies in the Grimsby area as hard to very hard — the company's own statement, not a measured town figure, so no mg/l value is published (source: Anglian Water). Water hardness still matters for scale: scale inside calorifiers, cylinders, and mixing valves gives legionella a foothold while blunting temperature control, so descaling and inspection belong in the written scheme of control. Check the supplier's postcode water-quality checker for the figure for your exact supply zone.

Legionnaires' disease: the national picture

UKHSA does not publish a separate surveillance figure for the Yorkshire & Humber, so no regional number is shown here. The most recent national figure recorded 472 confirmed cases of legionellosis across England and Wales in 2024 — the England & Wales average context, not a count for this region.

UKHSA states figures explicitly for only a handful of regions; a full region-by-region table is not published, and surveillance counts only laboratory-confirmed, reported cases, so the national total is a floor rather than the true number of infections. The full picture, with the trend since 2017, is on the Legionella Data Index. The absence of a regional figure changes nothing about your own duties: a non-domestic water system in Grimsby still needs a risk assessment, a control scheme, and the records to show the scheme is being followed.

Typical cost in Grimsby

Legionella risk assessment costs in Grimsby depend more on the water system than on the location. A rough guide:

• Small premises, mains-fed only, no storage: £150 to £250
• Typical office or shop with a hot water cylinder: £200 to £400
• Care home, hotel, or school with stored hot and cold water: £400 to £800
• Premises with a cooling tower or evaporative condenser: from £800, often much higher

Cooling towers drive the cost up because they are notifiable to the local authority under the Notification of Cooling Towers and Evaporative Condensers Regulations 1992, and they need quarterly sampling and extensive cleaning. Get a tailored estimate with our cost calculator.

Find a legionella risk assessor in Grimsby

We are building a directory of qualified water hygiene assessors in Grimsby and across the UK. In the meantime, look for assessors who:

• Work for a company registered with the Legionella Control Association (the LCA is the main UK trade body for water hygiene)
• Hold a City & Guilds or equivalent qualification in legionella risk assessment
• Can provide references from similar premises in the Grimsby area
• Will quote against a clear scope (number of outlets, inclusion of hot and cold surveys, whether sampling is included)

Legionella testing labs covering Grimsby

Routine temperature monitoring is done on site, but where your risk assessment or written scheme calls for water sampling, the samples go to a laboratory for culture. These UKAS-accredited laboratories cover Grimsby and accept posted samples:

• Eurofins Water Hygiene Testing UK Limited (UKAS no. 9658)
• Feedwater Laboratories (UKAS no. 2234), turnaround ~10 days, from £82.68 per sample
• ALS Environmental (ALS Laboratories (UK) Limited) (UKAS no. 1314)

Methods, turnaround times and published prices for the full directory are compared on the legionella testing labs page. Sampling is not a substitute for day-to-day control: a clear result records what was found at that outlet on that day, it never certifies a system as safe, and it sits alongside the routine checks in your written scheme of control, not instead of them.

Building types in Grimsby

Different building types have specific legionella considerations. Browse the guides most relevant to Grimsby premises:

• Landlords and rental properties
• Offices
• Care homes
• Hotels
• Schools
• Dental practices
• All building types