Fig. 4: Field validation of the WaterScope system.
From: Expanding access to water quality monitoring with the open-source WaterScope testing platform
Validation field trials were conducted using WaterScope systems in Juba (May 2022), Kawangware (September 2022), and Addis Ababa (June 2023), with slight modifications made between each trial. a Maps showing water sample types and locations for each trial. Scale bars are 10 km, 1 km and 5 km from left to right. b Compiled E. coli counts split into risk categories for WaterScope and Compact Dry testing methods. c ROC curves plotted for each field trial, generated by calculating binary classifications as the limit of detection is varied stepwise from 0 to 20, using Compact Dry results as reference. Legend values correspond to Area Under Curve (AUC) calculations.
