Complex sentence: In 1978, a water treatment plant was constructed in the towns east, which services other nearby towns including Mornington, Mount Eliza, Mount Martha, Somerville, Pearcedale and Baxter, and provides treated water to local vineyards, a tree plantation and lawns.
Split into simpler sentences: In 1978, a water treatment plant was constructed in the towns east. It services the nearby towns of Mornington, Mount Eliza, Mount Martha, Somerville, Pearcedale and Baxter, and provides treated water to local vineyards, a tree plantation and lawns.