It was during the night towards Thursday that the first water leak occurred.
It affected important societal functions and affected residents in both Nyköping and Oxelösund.
The municipality of Nyköping has earlier on Friday announced that it will need to boil the drinking water for several days to come.
On its website, the municipality writes that they will notify when it is no longer needed.
Elderly people should receive water delivery
At the same time, there is still low pressure in the cranes in both Nyköping and Oxelösund.
The plan is for preschools and schools to be able to reopen as usual on Tuesday.
You are forced to a lower level in elderly care, a level called basic nursing.
There will be staff who go out with water to those who have home care, in Oxelösund municipality.
A solution that is also being looked at in Nyköping.
Uses drones - appeals for help
The new leak that they are trying to locate with the help of drones and personnel.
The municipality also appeals to the public to tell if they see any large body of water.
- As soon as we have found the leak, we start repairing it, says Madeleine Jansson, VA manager in Nyköping.