To learn more about water quality issues faced by those areas, we talk with Dr. Stephanie Glenn, a senior research scientist at Houston Advanced Research Center (HARC).
And we talk with Dr. Jean Brender, a professor emeritus of epidemiology and biostatistics at Texas A&M University School of Public Health. Her research looked into the link between birth defects and three particular chemicals in drinking water: nitrate, atrazine and arsenic.
Dr. Brender tells Houston Matters producer Maggie Martin the main concern with contaminates in drinking water is in places where the supply isn't tested and regulated.
MORE: Texas Well Owner Network (Resources for Rural Well Owners)