How did the aztecs carry fresh water across lake texcoco

They built aqueducts

Explanation:

The Aztecs had the best technology in the Americas. Aqueducts, palaces, pyramids and temples rose to their gods and as testimonies of power to humanity. The greatest achievement of the Aztecs was their capital that was called the Venice of America by the Spanish conquerors, this city was called Tenochtitlan, its most striking feature was its aqueducts.

Its aqueduct had two channels, each with 1.20 meters high and 1 meter wide. One was kept with clean water and in the other water flowed. In the city, water was distributed to public sources and reservoirs and distributed in clay jugs.

They built aqueducts that retrieved water from the mountains