The dream might just be turning sour even before the scorching summer sets in. The uncertainty over making the 140 MGD Sonia Vihar water treatment plant operational from May this year continues to haunt the Delhi Government with the Chief Minister, Sheila Dikshit, today refraining from giving any deadline for start of supply to the water-starved areas of Delhi from this plant.In a complete U-turn, the Chief Minister declared in the Delhi Assembly today that 140 MGD water from the Sonia Vihar plant would flow only though the courtesy of the Uttaranchal and Uttar Pradesh governments. It is for the first time that Ms. Dikshit refused to give a clear deadline for making the plant operational as there seems uncertainty over supply of water to this plant from the Tehri dam in Uttaranchal.