
Luis Beltran looks at a sample from a wastewater plant in South Central Texas. Courtesy Photo.
Luis Beltran looks at a sample from a wastewater plant in South Central Texas. Courtesy Photo.
Luis Beltran looks at a sample from a wastewater plant in South Central Texas. Courtesy Photo.
Luis Beltran looks at a sample from a wastewater plant in South Central Texas. Courtesy Photo.