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. 2024 Apr 17;4(4):e0003039. doi: 10.1371/journal.pgph.0003039

Fig 1. The percentage of households connected to sewers in each census division.

Fig 1

Data are from the 2021 American Housing Survey National Survey [12]. The number of sampled households for each census division are 3890 (New England), 7018 (Middle Atlantic), 8703 (East North Central), 2862 (West North Central), 13643 (South Atlantic), 2903 (East South Central), 8051 (West South Central), 4570 (Mountain), and 12501 (Pacific). The map base layer is taken from the U.S. Census 2021 Cartographic Boundary File by U.S. Divisions (https://www2.census.gov/geo/tiger/GENZ2021/shp/cb_2021_us_division_500k.zip). The cartographic boundary files are simplified representations of the U.S. Census TIGER shapefiles (terms of use: https://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2021/TGRSHP2021_TechDoc_Ch1.pdf).