Is the city just going to fine each building $25 every time an inspector checks?
From the city's website, it looks like a fine of $300 can be assessed for buildings with more than 9 units (and for multiple infractions).
I assume this would incentivize owners to inform their tenants of the policy, and make composting more easily accessible to them. I can think of a dozen loopholes and unforeseen consequences of this law, but however imperfect, I still believe it's a step in the right direction. Food waste is a massive issue, as is nutrient loss from our soils, and ultimately I think that inconvenience is a small price to pay for addressing that. I realize that not everyone feels the same way, which is why incentives are needed.
This law is a negative incentive, so I would hope that some positive incentives could be implemented as well.
Water is essential to human survival, so I would consider that a primary problem. Trace pharmaceuticals in drinking water aren't great, but I would consider that a secondary (or even tertiary) problem, and a solvable one at that.
To start, the vast majority of water use is agricultural (nearly 90% in Colorado, for example), and soil & plants provide 2 more layers of biofilters for any contaminants that might remain. This paper delves into that, although from the cursory glance I gave it's not clear whether the concentrations are anywhere near an effective dose. My guess is no:
If recycled water was used purely for agriculture (drawing on watersheds & aquifers for drinking water), I imagine that would solve the scarcity issue while further diluting pharmaceutical contamination. When it comes to recycling drinking water, Harvard Health Publishing says that not much research has been done in this area, and I do think that's important to look into if (when?) water recycling becomes more of a necessity.