Region
Texas
Houston
55
United States
40
Austin
32
Louisiana
30
New Mexico
30
Dallas
19
Palo Duro Basin
19
San Antonio
16
El Paso
15
Gulf Coast
13
Louisiane
11
Mexico, Gulf of
11
Fort Worth
10
Gulf of Mexico
10
Deaf Smith County
9
Gulf Region
9
Mexico
9
Texas Panhandle
9
Austin (Tex.)
8
États-Unis
8
Oklahoma
8
Fort Hood
7
Galveston Bay
7
Houston Ship Channel
7
Arkansas
6
El Paso Region
6
Houston (Tex.)
6
Houston Ship Channel (Tex.)
6
Swisher County
6
Trinity River Watershed
6
Big Thicket
5
Big Thicket (Tex.)
5
Brazoria County
5
Dallas Metropolitan Area
5
Edwards Aquifer (Tex.)
5
Maryland
5
San Antonio River Watershed
5
Southwest, New
5
Texas Panhandle (Tex.)
5
Trinity River
5
Beaumont
4
Brazoria (Comté)
4
Ciudad Juárez
4
East Texas
4
Fort Worth Basin
4
Lubbock
4
Mexique, Golfe du
4
Mississippi
4
Terlingua district
4
more ...