Legionella bacteria has been found in the water supply at the MoD Abbey Wood.
Bosses at Filton's Defence Equipment and Support unit confirmed no employees had showed symptoms of the serious lung infection yet.
Specialists are now being brought in to locate the source.
A DE&S spokesperson said: “We have detected legionella bacteria in parts of the water supply at DE&S Abbey Wood.
"To date, no member of staff has reported symptoms.
“We are working closely with contractors to resolve the issue and ensure that any risk to employees is minimised.”
What are Legionnaires' Disease symptoms?
- Headache
- Muscle aches
- Fever that may be 40 C or higher
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By the second or third day, you'll develop other signs and symptoms that can include:
- Cough, which might bring up mucus and sometimes blood
- Shortness of breath
- Chest pain
- Gastrointestinal symptoms, such as nausea, vomiting and diarrhea
- Confusion or other mental changes
See your doctor if you think you've been exposed to legionella bacteria.
Diagnosing and treating Legionnaires' disease as soon as possible can help shorten the recovery period and prevent serious complications.
For people at high risk, such as smokers or older adults, prompt treatment is critical, according to MayoClinic.
