Skip to main content
U.S. flag

An official website of the United States government

E. coli dataset at from the Outfall of the Nogales International Wastewater Treatment Plant, geographic NAD83 (Water Years 2009–2015)

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: May 05, 2026 at 08:17 PM | Dataset Last Updated: August 07, 2020 at 12:00 AM
This dataset contains E. coli data collected at the Outfall of the Nogales International Wastewater Treatment Plant (NIWTP; SC6, 312724110580501) by U.S. International Boundary and Water Commission (IBWC) personnel. The IBWC collects discrete samples at the Outfall of the NIWTP daily or weekly by dipping a 100 mL sterilized IDEXX bottle in the centroid of flow. Samples are kept chilled and shipped to Turner Laboratories Inc. or Legend Technical Services Inc. Both laboratories use standard method 9223B for E. coli analysis, which uses the Colilert™-24 (Colilert) and Quanti-Tray®/2000 (Quanti-Tray) system. The holding time specified for wastewater is 30 hours. The dataset is a compilation of multiple paper records. E.coli concentrations reported as 0 most probable number (MPN) per100 mL were qualified as less than the 1 MPN/100mL specified by the Colilert test. The datasest includes E. coli concentration data for the period of June 01, 2009 to March 31, 2015.

Resources

2 resources available

Find Related Datasets

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov