Legionella risk assessment in Colchester

Updated 7 September 2026

Colchester's garrison, its university, and Colchester Hospital give the town an unusual spread of legionella-relevant premises for its size: military accommodation and welfare blocks around Merville Barracks, student residences on the University of Essex campus, and a full district general hospital estate. The historic Dutch Quarter and the older streets off the High Street contain many buildings converted between uses over centuries, where pipework has accumulated in layers. Drinking water here is supplied by Essex and Suffolk Water, with Abberton Reservoir just outside the town one of its main sources.

Local water supply

The mains water supplier for Colchester is Essex & Suffolk Water (Essex & Suffolk 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.

Legionnaires' disease: the national picture

UKHSA does not publish a separate surveillance figure for the East of England, 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 Colchester still needs a risk assessment, a control scheme, and the records to show the scheme is being followed.

Typical cost in Colchester

Legionella risk assessment costs in Colchester 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.

Legionella enforcement in the East of England

Prosecutions for legionella failings are usually brought under the Health and Safety at Work etc. Act 1974, whether by the HSE, a local authority, or (in Scotland) the Crown Office and Procurator Fiscal Service. These cases, recorded in Colchester and the East of England, are drawn from our legionella enforcement tracker, which records each one against its primary source:

Bupa Care Homes (BNH) Limited, 2018 (Care home) — fined £1.5m. An 86-year-old resident died of Legionnaires' disease at a Brentwood care home in 2015, months after refurbishment. The company failed to flush and disinfect the system, the manager lacked training, warnings were ignored and records were falsified. Fined £3m, reduced to £1.5m by the Court of Appeal.

Tendring District Council, 2018 (Local authority leisure) — fined £27k. A member of the public contracted Legionnaires' disease from the water system at the council-run Walton-on-the-Naze leisure centre. HSE found inadequate risk assessments, insufficient staff training and a lack of monitoring across several council leisure sites. Fined £27,000 plus £7,197 costs and a £170 victim surcharge at Colchester Magistrates' Court in December 2018.

The failings behind these cases are consistent: no suitable risk assessment, no written scheme of control, monitoring not carried out, or records that could not show the controls happened. The full dataset is on the enforcement tracker, and legionella fines and prosecutions explains how the courts approach sentencing.

Find a legionella risk assessor in Colchester

We are building a directory of qualified water hygiene assessors in Colchester 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 Colchester area
• Will quote against a clear scope (number of outlets, inclusion of hot and cold surveys, whether sampling is included)

Legionella testing labs covering Colchester

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. None of the UKAS-accredited laboratories in our directory is based in Colchester itself, so the nearest UKAS-accredited labs are listed below — all accept postal samples, and posted sampling is how most premises use them:

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

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

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