(a) Plot of distance to the NNN vs. NN for the polarized components in the EC RM catalog. The points are colored according to whether only the NN is polarized (green filled circles), only the NNN is polarized (green open circles), both the NN and NNN are polarized (black filled circles), or neither the NN nor NNN are polarized (black open circles). Dashed lines are plotted at 70″ and 100″ to highlight different populations of sources described in the text. (b) Absolute difference in RM of polarized components in the EC RM catalog and their NN vs. distance. The dashed line at 70″ separates small- and large-separation pairs. The data are colored by polarized fraction, with low polarized fraction components (p < 0.03) in orange and high polarized fraction components (p ≥ 0.03) in green, and the solid colored lines indicate the median value of the two populations of pairs.