I understand. You’re in a slight gray area, but I think you are providing a valuable if not essential service (eg, the OAP example) to the community. People need water.
So I would say you are a key worker.
Sad times, but unfortunately inevitable.
We simply cannot trust joe public to do the right thing.
We’ve known about this crisis for some time, yet too many stoopid basterds just don’t get it. Maybe now they will.