Neighboring Block Groups:
Block Group 181720-1,
Block Group 181703-1,
Block Group 181825-1,
Block Group 181826-1,
Block Group 181704-1,
Block Group 181821-1,
Block Group 181822-1,
Block Group 181703-2,
Block Group 181825-2,
Block Group 181826-2,
Block Group 181704-2,
Block Group 181811-2,
Block Group 181809-4