The City of Weslaco's South Wastewater Treatment Plant has been getting attention for its 302 kW solar array: On most days, the plant runs completely off the grid in the daytime, saving the city $16,500 in electrical costs annually.
Located five miles north of the Mexican border in the Rio Grande Valley of Texas, Weslaco has seen 15 percent growth in the past 10 years to a population of 37,000.
The city is split into two watersheds and has wastewater treatment plants on the north and south sides of town.
The 2.5 mgd South plant and the recently
