So my PC's are getting close to Krakow, and I thought of and interesting encounter for them, City Water as the city dose not have reliable power to provide water to the whole city and the city infrastructure is not up to carry any water pressure. Any habitation is going to have to buy water or haul it out of the river themselves and somehow clean it. So along comes this group they have some stills to distill and clean the water from the river and the equipment to haul it to people that can pay them.
Some twists you can add
1. They are a mob but not part of the criminal mobs
2. They are part of the criminal mob.
3. They are part of a segment of city government that is looking to help overthrow the current people in control.
4. They want to stay neutral in the ongoing power struggle, they are really trying to help people survive.
5. They are trying to "get rich" off this.
This group also runs the public restrooms along with the city medics, to help cut down on illness, granted people cleaning them are refuges working to gain citizenship to Krakow and are not treated the best.