Fig. 3
Active UGS wells with 200 m2 well-areas (multi-colored) within focused area of Stark County, OH. Black lines represent census block boundaries, yellow lines represent roadways, grey points represent RHUs, and black symbols represent visually verified RHUs within the 100 ft. setback well-area. Colors of the 200 m radial buffer distances represent over- and under-estimation of populations comparing PPA vs. uncapped ABODE. Blue circles indicate areas where PPA overestimated populations compared to ABODE by at least 50 people, or at least 10% of the entire county distribution. Red indicates where PPA underestimated by at least 50 people, or at least 10%, compared to ABODE