In this sense, cities upstream of drinking water intakes are already providing water reclamation in their wastewater treatment facilities&#151;for they treat the water, then release it into the raw water supply used by downstream communities.
(the raw water supply; used; by downstream communities) (they; treat then; the water) Context(they treat then,List([147, 173))):(cities upstream of drinking water intakes; are providing; water reclamation in their wastewater treatment facilities&#151; T:In this sense; T:already) Context(they treat then,List([147, 173))):(they; treat then release; it; into the raw water supply; T:then)
they treat then,List([147, 173)) they treat then,List([147, 173))
the raw water supply they cities upstream of drinking water intakes they
used treat then are providing treat then release
by downstream communities
the water
water reclamation in their wastewater treatment facilities&#151 T:In this sense T:already
it into the raw water supply T:then