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. 2021 Jun 23;129(6):067004. doi: 10.1289/EHP7813

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Figure 3 is a line graph plotting Depth to water in meters, ranging from 2.0 to 0.0 in decrements of 0.5 (y-axis) across November, 2015 to April, 2017 in unit increments for depth to water, total coliform per nitrate, pathogen or fecal indicator, and manure application ban. — Sampling periods in relation to groundwater level in Kewaunee County monitoring well KW-183 (USGS 443535087345401; USGS 2020). Sampling times indicated by red circles (total coliforms and nitrate) and green triangles (pathogens and fecal indicators). Boxes indicate the number of wells positive for human-specific or bovine-specific markers; $n = total number of wells sampled$ . Gray shaded areas designate seasonal manure application ban for fields with bedrock depths $< 6.1 m$ .