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Table 2 Overall and RUCC-stratified domain variable means, standard deviations, ranges for select variables in the water domain

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/1000 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)

 

[0, 1.270]

[0, 1.900]

[0, 0.560]

[0, 0.620]

[0, 1.900]

  1. Complete list of variables is available in Additional file 2.
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Environmental Health

ISSN: 1476-069X