They have plumbing as in the toilets flush and there’s a tap on the outside of the loo with a gutter, not a sink (to deter bathing etc). I think they have electricity via solar panel — it’s dim-ish blue lighting to ensure it’s harder to find veins to shoot up. Oh, and there’s a hose connection so someone can hose down the whole thing to clean it if it gets bad.

The restrooms are really well-optimized for public safety, used one in Burlington, VT, it did the job well!