City of Lincoln Council have revealed the levels of legionella bacteria found at a sheltered housing block in Lincoln were almost 12 times the safe level.
The council also says the water system is only checked every six months. They're now chemically flushing out the system, and say it's entirely a precautionary measure.
Legionella can cause Legionnaire's disease if it becomes airborne and water particles are inhaled.
Elderly residents have been told not to turn their taps on and have been provided with bottled water and off site washing facilities.
More top news
Technical problems with the French TV coverage of TDY Women’s race means it is not being shown on ITV4.
Sheridan Smith won a standing ovation as she returned to the West End stage after claims she was 'drunk' during a performance.
The first stage of this year’s Tour de Yorkshire saw four season’s worth of weather before a thrilling sprint finish in Settle.