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Legend (HDE/SouthernHighPlainsMap)

StudyArea (0)
Edwards-Trinity aquifer downdip extent (1)
Original Texas Land Survey Sections (2)
All (4)
Base of Ogallala Formation (5)
Top of Trinity Group (6)
Top of Dockum Group (7)
Base of Dockum Group (8)
Groundwater-level measurement well (10)
Median nitrate concentration, in milligrams per liter (mg/L) (11)
<=2.5 <=2.5
>2.5 to 5.0 >2.5 to 5.0
>5.0 to 7.5 >5.0 to 7.5
>7.5 to 10.0 >7.5 to 10.0
>10.0 >10.0
Median dissolved-solids concentration, in milligrams per liter (mg/L) (12)
<= 500 <= 500
> 500 to 1,000 > 500 to 1,000
> 1,000 to 3,000 > 1,000 to 3,000
>3,000 >3,000
Groundwater flow path (13)
0 0
1 1
Potentiometric contour, feet above NAVD 88 (14)
Major Contour Major Contour
Minor Contour Minor Contour
Groundwater-level measurement well (16)
Median nitrate concentration, in milligrams per liter (mg/L) (17)
<=2.5 <=2.5
>2.5 to 5.0 >2.5 to 5.0
>5.0 to 7.5 (not present) >5.0 to 7.5 (not present)
>7.5 to 10.0 >7.5 to 10.0
>10.0 (not present) >10.0 (not present)
Median dissolved-solids concentration, in milligrams per liter (mg/L) (18)
<= 500 <= 500
> 500 to 1,000 > 500 to 1,000
> 1,000 to 3,000 > 1,000 to 3,000
>3,000 (not present) >3,000 (not present)
Groundwater flow path (dashed where approximately located) (19)
1, 0 1, 0
1, 1 1, 1
0, 1 0, 1
0, 0 0, 0
Potentiometric contour, feet above NAVD 88 (dashed where approximately located) (20)
Major Contour Major Contour
Minor Contour Minor Contour
Major Contour, Approximate Major Contour, Approximate
Minor Contour, Approximate Minor Contour, Approximate
Ogallala aquifer change in water level altitude from early development (1930-1960) to recent (2005-2015), feet above NAVD 88 (21)
-174 to -150 -174 to -150
-149 to -125 -149 to -125
-124 to -100 -124 to -100
-99 to -75 -99 to -75
-74 to -50 -74 to -50
-49 to -25 -49 to -25
-24 to 0 -24 to 0
1 to 25 1 to 25
26 to 50 26 to 50
51 to 66 51 to 66
Groundwater-level measurement well (23)
Groundwater flow path (dashed where approximately located) (24)
1, 0 1, 0
1, 1 1, 1
0, 1 0, 1
0, 0 0, 0
Potentiometric contour, feet above NAVD 88 (dashed where approximately located) (25)
Major Contour Major Contour
Minor Contour Minor Contour
Major Contour, Approximate Major Contour, Approximate
Minor Contour, Approximate Minor Contour, Approximate
Groundwater-level measurement well (27)
Groundwater flow path (dashed where approximately located) (28)
0, 0 0, 0
1, 0 1, 0
1, 1 1, 1
Potentiometric contour, feet above NAVD 88 (dashed where approximately located) (29)
Major Contour Major Contour
Minor Contour Minor Contour
Major Contour, Approximate Major Contour, Approximate
Minor Contour, Approximate Minor Contour, Approximate
Edwards-Trinity aquifer change in water level altitude from early development (1930-1960) to recent (2005-2015), feet above NAVD 88 (30)
-61 to -50 -61 to -50
-49 to -25 -49 to -25
-24 to 0 -24 to 0
1 to 20 1 to 20
Ogallala aquifer nitrate concentration (2014-2016), in milligrams per liter (mg/L) (31)
<=2.5 <=2.5
>2.5 to 5.0 >2.5 to 5.0
>5.0 to 7.5 >5.0 to 7.5
>7.5 to 10.0 >7.5 to 10.0
>10.0 >10.0
Ogallala aquifer dissolved-solids concentration (2014-2016), in milligrams per liter (mg/L) (32)
<= 500 <= 500
> 500 to 1,000 > 500 to 1,000
> 1,000 to 3,000 > 1,000 to 3,000
>3,000 (not present) >3,000 (not present)