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Table 7 Overall and RUCC-stratified loadings for select variables in the water domain

From: Construction of an environmental quality index for public health research

Constructs indented Metropolitan - urbanized Non-metro urbanized Less-urbanized Thinly populated Overall
  (RUCC1 = 1089) (RUCC2 = 323) (RUCC 3 = 1059) (RUCC4 = 670) (n = 3141)
Water Domain      
  Overall water quality      
% of stream length impaired in county 0.0078 0.0063 −0.0067 −0.0172 0.0031
  General water contamination      
Industrial permits −0.0214 −0.0394 −0.0078 0.0084 −0.0114
  Recreational water quality      
# of days of beach closure −0.0019 −0.0072 0.0085 0.0092 0
  Domestic use water quality      
% Population which is on surface water supply 0.0190 0.0175 0.0098 0.0346 0.0220
  Atmospheric deposition      
Calcium (Ca) precipitation weighted mean 0.0325 0.0179 0.0231 −0.0055 0.0154
Total Mercury (Hg) deposition −0.0413 −0.0359 −0.0293 0.0072 −0.0228
  Drought      
% of county drought – extreme (D3-D4) 0.0035 0.0337 0.0234 0.0242 0.0164
  Chemical contamination      
Selenium 0.1123 0.1196 0.1044 0.1071 0.1103
Silvex 0.1217 0.1209 0.1204 0.1270 0.1226
Chlordane 0.1314 0.1344 0.1343 0.1346 0.1336
1,2-Dichloropropane 0.1451 0.1452 0.1512 0.1461 0.1473
Alpha Particles 0.0620 0.0794 0.0703 0.0704 0.0691
  1. Complete list of variable loadings is available in Additional file 3.