From: Construction of an environmental quality index for public health research
 |  | Metropolitan - urbanized | Non-metro urbanized | Less-urbanized | Thinly populated | Overall |
---|---|---|---|---|---|---|
 |  | (RUCC1 = 1089) | (RUCC2 = 323) | (RUCC 3 = 1059) | (RUCC4 = 670) | (n = 3141) |
Variable (construct) | Units | Mean (sd) [range] | Mean (sd) [range] | Mean (sd) [range] | Mean (sd) [range] | Mean (sd) [range] |
Impaired stream length in county | percent | 14.004 (16.528) | 14.203 (20.403) | 8.791 (12.682) | 6.537 (9.470) | 10.674 (14.853) |
(Overall water quality) | [0, 92.570] | [0, 94.450] | [0, 95.740] | [0, 98.500] | [0, 98.500] | |
Industrial Permits | permits/1000Â km | 51.139 (96.466) | 27.241 (31.332) | 18.423 (38.732) | 10.080 (22.009) | 28.893 (64.947) |
(General water contamination) | [0, 1195.680] | [0, 280.860] | [0, 674.150] | [0, 337.300] | [0, 1195.680] | |
Number of days of beach closure | days | 3.229 (19.625) | 1.421 (9.859) | 0.143 (1.945) | 0.022 (0.508) | 1.318 (12.118) |
(Recreational water quality) | [0, 365.000] | [0, 116.000] | [0, 55.000] | [0, 13.000] | [0, 365.000] | |
Percent of Public Supply Population on Surface Water | percent | 46.863 (41.736) | 41.922 (41.306) | 33.775 (40.841) | 21.942 (36.526) | 36.627 (41.386) |
(Domestic use water quality) | [0, 100.000] | [0, 100.000] | [0, 100.000] | [0, 100.000] | [0, 100.000] | |
Calcium (Ca) precipitation weighted mean | mg/L | 0.192 (0.120) | 0.217 (0.130) | 0.255 (0.144) | 0.279 (0.144) | 0.231 (0.139) |
(Atmospheric deposition) | [0.040, 0.594] | [0.043, 0.634] | [0.042, 1.183] | [0.047, 0.806] | [0.040, 1.183] | |
Total Mercury (Hg) deposition | ng/M2 | 4.784 (1.249) | 4.635 (1.364) | 4.780 (1.397) | 4.520 (1.405) | 4.711 (1.350) |
(Atmospheric deposition) | [1.101, 9.219] | [1.100, 7.950] | [1.109, 8.473] | [1.103, 8.458] | [1.100, 9.219] | |
Percent of county drought – extreme (D3-D4) | percent | 3.160 (5.273) | 3.522 (6.215) | 3.908 (6.931) | 5.030 (8.577) | 3.848 (6.777) |
(Drought) | [0, 46.900] | [0, 42.430] | [0, 40.400] | [0, 48.800] | [0, 48.800] | |
Alpha Particles | PCl/L | 1.034 (2.333) | 1.113 (1.851) | 1.364 (3.517) | 0.781 (2.053) | 1.099 (2.711) |
(Chemical contamination) | [0, 35.800] | [0, 11.390] | [0, 51.450] | [0, 18.100] | [0, 51.450] | |
Selenium | mg/L | 3.13E-03 (4.73E-03) | 2.93E-03 (3.65E-03) | 3.00E-03 (5.12E-03) | 2.25E-03 (4.45E-03) | 4.72E-03 (2.88E-03) |
(Chemical contamination) | [0, 5.00E-02] | [0, 3.00E-02] | [0, 9.40E-02] | [0, 4.70E-02] | [0, 9.40E-02] | |
Silvex | ug/L | 0.384 (1.020) | 0.579 (1.836) | 0.384 (1.087) | 0.184 (0.633) | 0.362 (1.096) |
(Chemical contamination) | [0, 5.000] | [0, 25.250] | [0, 12.500] | [0, 5.000] | [0, 25.250] | |
Chlordane | ug/L | 0.088 (0.100) | 0.099 (0.096) | 0.090 (0.097) | 0.068 (0.094) | 0.086 (0.098) |
(Chemical contamination) | [0, 0.950] | [0, 0.273] | [0, 0.267] | [0, 0.200] | [0, 0.950] | |
Tetrachloroethylene | ug/L | 0.460 (0.584) | 0.397 (0.376) | 0.407 (0.771) | 0.325 (0.300) | 0.407 (0.595) |
(Chemical contamination) | [0, 8.000] | [0, 5.110] | [0, 23.750] | [0, 4.330] | [0, 23.750] | |
1,2-Dichloropropane | ug/L | 0.360 (0.232) | 0.364 (0.243) | 0.368 (0.217) | 0.313 (0.240) | 0.353 (0.231) |
(Chemical contamination) | Â | [0, 1.270] | [0, 1.900] | [0, 0.560] | [0, 0.620] | [0, 1.900] |