Over the past quarter-century, water quality and pesticide issues affecting farmworkers in Mexico have been identified in peer-reviewed literature. The following examples are of interest, but are not necessarily broadly representative. In the Mezquital Valley of central Mexico, in the early 1990s, about 85,000 acres were irrigated with wastewater. A study of the implications found that important outcomes were diarrheal disease and parasitic infections in farmworkers and their families. Pesticide issues were investigated in 200 farmworkers in a small area of northwestern Mexico in the 1990s. Of those workers, 59% could read at the third-grade level, few had received information about pesticides; 30% did not wear personal protective gear; and 20% had experienced acute pesticide poisoning at least once during the season investigated. A study was conducted comparing 25 farm workers engaged in pesticide spraying with a control group of 21 workers not exposed to pesticides, from the Nextipac community in Jalisco, Mexico. The exposed group showed acute poisoning in 20 percent of the cases.