Escherichia coli efflux from rangeland ecosystems in the southcentral Great Plains of the United States.

Bacterial contamination of surface water is a public health concern. To quantify the efflux of Escherichia coli into ephemeral and intermittent streams and assess its numbers in relation to secondary body contact standards, we monitored runoff and measured E. coli numbers from 10 experimental watersheds that differed in vegetation cover and cattle access in north-central Oklahoma.

Concentration as a Function of Stream Order and Watershed Size.

This research examines the relationship of concentrations to stream order and watershed size and considers the implications on water quality standards. To assess geospatial effects, data were obtained from 743 monitoring stations in the Central Great Plains, Cross Timbers, and South Central Plains ecoregions of Texas and Oklahoma. Median and geometric mean concentrations were analyzed for correlation with stream order and watershed size at each site.

Consumer water quality evaluation of private and public drinking water sources.

Private water wells have no requirements to be tested or monitored to ensure safe drinking water quality, and yet those receiving their primary drinking water from private supplies are more frequently confident that their tap drinking water is safe. Using data from surveys administered in 2008 and 2014, this study assesses public attitudes and perceptions regarding drinking water. This study examines the results of a random sample survey of Texans to evaluate citizen awareness and attitudes on water issues.