The DEP in NYC has the words SAVE WATER printed on all their envelopes. I don’t know if you’d consider it a big push, but these words are something you see/hear pretty often. And I’d say it’s mainly for environmental purposes. The city sometimes has what they consider droughts, but it’s usually exaggerated and water levels bounce back pretty quickly.
As an aside, when total water usage goes down, as in the start of metered water in NYC, the rates invariably increase. The city gets its water for free from Hashem, although they have to “process” it. So ironically, overall less water usage means higher rates for everyone, so across the board conservation doesn’t exactly translate into individual savings. The city still needs to cover its infrastructure and maintenance costs regardless of consumption.