- Home
- Publications & Products
- New analyses reveal WUI growth in the U.S.
- State by state summary of WUI
Publications & Products
Wildland Urban Interface (WUI) areas in the U.S.
Area of Wildland-Urban Interface (WUI) by State
|
State |
Total area |
Area of WUI (km2) |
km2 |
1990 |
2000 |
2010 |
Expansion of WUI Area
(km2)
1990-2010
| Percent Change in
WUI Area
1990-2010 |
Alabama | 135,767 | 22,877 | 28,552 |
31,044 |
8,167 |
35.7% |
Arizona | 295,235 | 5,695 | 7,118 |
8,814 |
3,118 |
54.7% |
Arkansas | 137,732 | 10,977 | 14,554 |
16,393 |
5,415 |
49.3% |
California | 423,967 | 22,618 | 24,375 |
27,026 |
4,407 |
19.5% |
Colorado | 269,602 | 5,713 | 7,600 |
9,438 |
3,725 |
65.2% |
Connecticut | 14,358 | 8,026 | 8,232 |
8,512 |
486 |
6.1% |
Delaware | 6,446 | 692 | 882 |
980 |
288 |
41.6% |
Florida | 170,310 | 18,504 | 22,570 |
26,159 |
7,655 |
41.4% |
Georgia | 153,911 | 29,667 | 37,165 |
41,853 |
12,186 |
41.1% |
Idaho | 216,442 | 2,451 | 3,318 |
4,220 |
1,769 |
72.2% |
Illinois | 149,995 | 3,539 | 3,944 |
4,286 |
747 |
21.1% |
Indiana | 94,326 | 7,638 | 9,254 |
10,491 |
2,853 |
37.4% |
Iowa | 145,746 | 1,331 | 1,625 |
1,779 |
448 |
33.7% |
Kansas | 213,100 | 1,932 | 2,258 |
2,539 |
608 |
31.5% |
Kentucky | 104,656 | 18,874 | 23,858 |
25,691 |
6,818 |
36.1% |
Louisiana | 135,659 | 13,235 | 15,006 |
16,468 |
3,232 |
24.4% |
Maine | 91,634 | 13,271 | 15,673 |
17,761 |
4,490 |
33.8% |
Maryland | 32,131 | 7,035 | 7,859 |
8,099 |
1,064 |
15.1% |
Massachusetts | 27,336 | 10,587 | 11,059 |
11,466 |
879 |
8.3% |
Michigan | 250,487 | 22,464 | 26,557 |
29,067 |
6,603 |
29.4% |
Minnesota | 225,162 | 7,507 | 8,735 |
10,023 |
2,516 |
33.5% |
Mississippi | 125,438 | 16,785 | 21,668 |
24,352 |
7,567 |
45.1% |
Missouri | 180,540 | 10,233 | 13,123 |
15,499 |
5,267 |
51.5% |
Montana | 380,831 | 3,168 | 4,079 |
5,304 |
2,135 |
67.4% |
Nebraska | 200,329 | 1,048 | 1,159 |
1,233 |
185 |
17.6% |
Nevada |
286,380 |
1,513 |
2,069 |
2,440 |
927 |
61.2% |
New Hampshire |
24,214 |
8,246 |
8,919 |
9,969 |
1,723 |
20.9% |
New Jersey |
22,591 |
6,660 |
6,912 |
6,995 |
335 |
5.0% |
New Mexico |
314,918 |
4,901 |
6,195 |
6,859 |
1,958 |
39.9% |
New York |
141,297 |
32,328 |
36,012 |
39,519 |
7,192 |
22.2% |
North Carolina |
139,391 |
42,795 |
49,888 |
54,956 |
12,161 |
28.4% |
North Dakota |
183,124 |
471 |
560 |
673 |
202 |
42.9% |
Ohio |
116,098 |
15,624 |
18,208 |
20,104 |
4,480 |
28.7% |
Oklahoma |
181,037 |
9,934 |
11,726 |
13,684 |
3,750 |
37.7% |
Oregon |
254,800 |
7,792 |
8,469 |
9,447 |
1,655 |
21.2% |
Pennsylvania |
119,280 |
36,127 |
39,460 |
41,720 |
5,593 |
15.5% |
Rhode Island |
4,001 |
1,514 |
1,580 |
1,634 |
120 |
7.9% |
South Carolina |
82,933 |
20,411 |
25,561 |
27,874 |
7,463 |
36.6% |
South Dakota |
199,729 |
937 |
1,110 |
1,399 |
462 |
49.3% |
Tennessee |
109,153 |
21,494 |
27,261 |
30,722 |
9,228 |
42.9% |
Texas |
695,661 |
31,565 |
39,319 |
46,449 |
14,884 |
47.2% |
Utah |
219,884 |
2,197 |
2,735 |
3,549 |
1,352 |
61.5% |
Vermont | 24,906 | 6,142 | 7,190 |
8,663 |
2,521 |
41.0% |
Virginia |
110,787 |
26,631 |
31,935 |
35,832 |
9,201 |
34.6% |
Washington, D.C. |
177 |
10 |
10 |
8 |
-2 |
-20.7% |
Washington |
184,661 |
11,464 |
13,125 |
14,991 |
3,527 |
30.8% |
West Virginia |
62,755 |
14,176 |
16,367 |
17,557 |
3,381 |
23.9% |
Wisconsin | 169,635 | 10,492 | 11,828 |
14,349 |
3,858 |
36.8% |
Wyoming | 253,334 | 1,541 | 1,868 |
2,412 |
871 |
56.5% |
Total | 8,081,886 | 580,831 | 688,529 |
770,301 |
189,470 |
32.6% |
Number of houses in the WUI Interface
Houses in the Wildland-Urban Interface (WUI) by State |
State |
All houses 1990 |
Houses in the WUI 1990 |
All houses 2000 |
Houses in the WUI 2000 |
All houses 2010 |
Houses in the WUI 2010 |
Expansion of WUI homes 1990-2010
| Percent change in WUI homes 1990-2010 |
Number |
Number |
Number
|
Number |
Number |
Number |
Number |
Percent |
Alabama |
1,670,379 |
912,226 |
1,963,711 |
1,126,380 |
2,171,853 |
1,269,955 |
357,729 |
39.2% |
Arizona |
1,659,430 |
633,572 |
2,189,189 |
948,314 |
2,844,526 |
1,318,387 |
684,815 |
108.1% |
Arkansas |
1,000,667 |
415,321 |
1,173,043 |
518,026 |
1,316,299 |
593,256 |
177,935 |
42.8% |
California |
11,182,882 |
3,309,716 |
12,214,549 |
3,788,536 |
13,680,081 |
4,426,803 |
1,117,087 |
33.8% |
Colorado |
1,477,349 |
541,780 |
1,808,037 |
724,688 |
2,212,898 |
940,552 |
398,772 |
73.6% |
Connecticut |
1,320,850 |
680,497 |
1,385,975 |
734,259 |
1,487,891 |
800,454 |
119,957 |
17.6% |
Delaware |
289,919 |
28,249 |
343,072 |
39,344 |
405,885 |
42,116 |
13,867 |
49.1% |
Florida |
6,100,262 |
1,478,928 |
7,302,947 |
1,966,812 |
8,989,580 |
2,628,053 |
1,149,125 |
77.7% |
Georgia |
2,638,418 |
1,230,849 |
3,281,737 |
1,585,327 |
4,088,801 |
1,964,288 |
733,439 |
59.6% |
Idaho |
413,327 |
171,968 |
527,824 |
222,080 |
667,796 |
273,601 |
101,633 |
59.1% |
Illinois |
4,506,275 |
345,667 |
4,885,615 |
382,862 |
5,296,715 |
405,329 |
59,662 |
17.3% |
Indiana |
2,246,046 |
266,553 |
2,532,319 |
316,309 |
2,795,541 |
348,300 |
81,747 |
30.7% |
Iowa |
1,143,669 |
85,783 |
1,232,511 |
96,741 |
1,336,417 |
99,430 |
13,647 |
15.9% |
Kansas |
1,044,112 |
149,304 |
1,131,200 |
161,872 |
1,233,215 |
175,872 |
26,568 |
17.8% |
Kentucky |
1,506,845 |
533,690 |
1,750,927 |
644,332 |
1,927,164 |
691,215 |
157,525 |
29.5% |
Louisiana |
1,716,241 |
661,151 |
1,847,181 |
751,922 |
1,964,981 |
838,021 |
176,870 |
26.8% |
Maine |
587,045 |
442,154 |
651,901 |
508,009 |
721,830 |
576,989 |
134,835 |
30.5% |
Maryland |
1,891,917 |
518,387 |
2,145,283 |
632,955 |
2,378,814 |
705,543 |
187,156 |
36.1% |
Massachusetts |
2,472,711 |
1,031,635 |
2,621,989 |
1,131,158 |
2,808,254 |
1,219,921 |
188,286 |
18.3% |
Michigan |
3,847,926 |
804,902 |
4,234,279 |
962,147 |
4,532,233 |
1,062,135 |
257,233 |
32.0% |
Minnesota |
1,848,445 |
322,868 |
2,065,946 |
375,692 |
2,347,201 |
411,784 |
88,916 |
27.5% |
Mississippi |
1,010,423 |
523,946 |
1,161,953 |
643,058 |
1,274,719 |
734,564 |
210,618 |
40.2% |
Missouri |
2,199,129 |
386,208 |
2,442,017 |
485,566 |
2,712,729 |
571,359 |
185,151 |
47.9% |
Montana |
361,155 |
223,898 |
412,633 |
260,012 |
482,825 |
308,567 |
84,669 |
37.8% |
Nebraska |
660,620 |
106,848 |
722,668 |
113,355 |
796,793 |
117,513 |
10,665 |
10.0% |
Nevada |
518,858 |
186,463 |
827,457 |
300,475 |
1,173,814 |
536,403 |
349,940 |
187.7% |
New Hampshire |
503,904 |
388,639 |
547,024 |
428,921 |
614,754 |
490,791 |
102,152 |
26.3% |
New Jersey |
3,075,310 |
745,783 |
3,310,275 |
825,241 |
3,553,562 |
898,982 |
153,199 |
20.5% |
New Mexico |
632,058 |
400,342 |
780,579 |
519,693 |
901,388 |
615,076 |
214,734 |
53.6% |
New York |
7,226,891 |
1,528,848 |
7,679,307 |
1,669,391 |
8,108,103 |
1,797,720 |
268,872 |
17.6% |
North Carolina |
2,818,193 |
1,394,594 |
3,523,944 |
1,813,508 |
4,327,528 |
2,256,276 |
861,682 |
61.8% |
North Dakota |
276,340 |
40,882 |
289,677 |
44,807 |
317,498 |
52,234 |
11,352 |
27.8% |
Ohio |
4,371,945 |
686,107 |
4,783,051 |
774,046 |
5,127,508 |
825,683 |
139,576 |
20.3% |
Oklahoma |
1,406,499 |
489,840 |
1,514,400 |
548,959 |
1,664,378 |
620,122 |
130,282 |
26.6% |
Oregon |
1,193,567 |
423,481 |
1,452,708 |
508,545 |
1,675,562 |
595,949 |
172,468 |
40.7% |
Pennsylvania |
4,938,140 |
1,753,205 |
5,249,750 |
1,922,115 |
5,567,315 |
2,021,129 |
267,924 |
15.3% |
Rhode Island |
414,572 |
114,310 |
439,837 |
128,646 |
463,388 |
142,751 |
28,441 |
24.9% |
South Carolina |
1,424,155 |
810,830 |
1,753,670 |
1,057,033 |
2,137,683 |
1,302,246 |
491,416 |
60.6% |
South Dakota |
292,436 |
73,676 |
323,208 |
83,579 |
363,438 |
96,660 |
22,984 |
31.2% |
Tennessee |
2,026,067 |
701,050 |
2,439,443 |
898,516 |
2,812,133 |
1,034,597 |
333,547 |
47.6% |
Texas |
7,008,999 |
1,947,531 |
8,157,575 |
2,378,191 |
9,977,436 |
3,042,930 |
1,095,399 |
56.2% |
Utah |
598,388 |
268,902 |
768,594 |
350,964 |
979,709 |
467,828 |
198,926 |
74.0% |
Vermont |
271,214 |
183,196 |
294,382 |
202,890 |
322,539 |
229,140 |
45,944 |
25.1% |
Virginia |
2,496,334 |
991,416 |
2,904,192 |
1,233,938 |
3,364,939 |
1,446,470 |
455,054 |
45.9% |
Washington, D.C. |
278,489 |
6,348 |
274,845 |
5,297 |
296,719 |
4,371 |
-1,977 |
-31.1% |
Washington |
2,032,378 |
669,997 |
2,451,075 |
836,795 |
2,885,677 |
1,010,550 |
340,553 |
50.8% |
West Virginia |
781,295 |
618,290 |
844,623 |
671,653 |
881,917 |
697,069 |
78,779 |
12.7% |
Wisconsin |
2,055,768 |
389,869 |
2,321,144 |
443,695 |
2,624,358 |
512,339 |
122,470 |
31.4% |
Wyoming |
203,411 |
162,983 |
223,854 |
180,206 |
261,868 |
212,789 |
49,806 |
30.6% |
Total |
101,641,253 |
30,782,682 |
115,183,120 |
36,946,860 |
130,878,255 |
43,434,112 |
12,651,430 |
41.1% |
(Source: Martinuzzi, Sebastián; Stewart, Susan I.; Helmers, David P.; Mockrin, Miranda H.; Hammer, Roger B.; Radeloff, Volker C. 2015. The 2010 wildland-urban interface of the conterminous United States. Research Map NRS-8. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 124 p. [includes pull-out map].)
Download
Area and Homes in the Wildland Urban Interface table (pdf)
For additional information, please contact Cherie LeBlanc Fisher.
Last Modified: February 16, 2018