The water emergency has been announced after reservoirs in the region fell below 16 per cent of their full capacity.
The stricter water-saving measures will apply six million people in the region.
"Catalonia is suffering the worst drought in the last century," said Catalonia's regional government chief Pere Aragones."We have never faced such a long and intense drought since rainfall records began."
Water-levels in some reservoirs have gone so low that old submerged structures like bridge, churches have resurfaced.
The fresh measures may mean that swimming pools will not be able to use water as reservoirs struggle to maintain water levels.
The situation is feared to get worse.