The region, comprising eight districts, is getting water through 635 tankers.
Of these, 438 have been pressed into service in Aurangabad district alone, officials said.
In Beed district, population of 2.14 lakh is receiving water through 113 tankers, whereas Jalna district has 59 tankers providing water to 1.39 lakh people.
A senior official from the revenue department said on Saturday that over 565 wells have been acquired from different parts of Marathwada to fill water tankers.
“Maximum wells (251) have been seized in Aurangabad district, followed by Beed (129), Osmanabad (96), Jalna (87) and Nanded (2).
The water from these acquired wells is strictly reserved for drinking purposes only,” he said.
The demand for tankers is increasing rapidly.
Among eight districts of the region, Beed district reported the lowest (47%) average annual rainfall, followed by Aurangabad (51%) and Jalna (60%).
Gangapur tensil is the worst affected with 113 tankers, followed by Vaijapur (92), Sillod (78), Paithan (70) and Aurangabad (42).
In Beed district, tehsil limits of Beed is receiving maximum number of tankers (32), followed by Georai and Ashti (both 26).