Fig. 1From: Longitudinal borehole functionality in 15 rural Ghanaian towns from three groundwater quality clustersBorehole functionality (%) across study towns in control [towns 1–5 on the left], high salinity [towns 6–10 in the center], and high iron [towns 11–15 on the right] water quality clusters. Three bars for each town represent years (2014, 2015, and 2016) from left to rightBack to article page