Citations? Here're mine:
USA uses about 1500 m3/capita/year, which is similar to New Zealand (1200 m3/capita/year) and Canada (1400 m3/capita/year). Compare with California alone, we're at 178 gallons/capita/day which is 245 m3/capita/year. That's lower than most countries.
I'm (reasonably) sure that number the 178 gallons/person/day figure is the "urban" per-capita, not the per-capita of the entire state.
The state's per-capita water use is more like 1390 gallons/person/day.