PECOS

WEBB

BREWSTER

HUDSPETH

PRESIDIO

REEVES

CULBERSON

VAL VERDE

DUVAL

TERRELL

CROCKETT

KENEDY

FRIO

HARRIS

HILL

BELL

BEE

CLAY

POLK

EDWARDS

JEFF DAVIS

KERR

GAINES

LEON

UVALDE

HALE

DALLAM

IRION

DIMMIT

LAMB

KING

BEXAR

KINNEY

STARR

HALL

WISEJACK

UPTON

HIDALGO

SUTTON

CASS

OLDHAM

ELLIS

MEDINA

KIMBLE

ZAVALA

KENT

RUSK

LEE

LYNN

GRAY

COKE

LA SALLE

MILAM

ERATH

HARTLEY

HUNT

BRAZORIA

SMITH

KNOX

FLOYD

LLANO

ANDREWS

TYLER

TRAVIS

LIBERTY

JONES

NUECES

REAGAN

BOWIE

WARD

ZAPATA

LAMAR

REAL

NOLAN

TERRY GARZA

MILLS

COLEMAN

ECTOR

TOM GREEN

MASON

YOUNG

FALLS

CAMERON

MATAGORDA

HAYS

BROWN

COOKE

JAS

PE

R

DEAF SMITH

BURNET

MAVERICK

HOUSTON

LAVACA

FISHER

COLLIN

MOORE

FANNIN

MOTLEY

MARTIN

LIVE OAK

DALLAS

EL PASO

BAILEY

BOSQUE

HARDIN

KLEBERG

JIM HOGG

TAYLOR

COTTLE

POTTER

DONLEY

GOLIAD

SAN SABA

ATASCOSA

DENTON

CORYELLCRANE

CONCHO

BAYLOR

DE WITT

BROOKS

PARKER

RUNNELS

NAVARRO

ARCHER

CARSON

CASTRO

WOOD

SCURRY

CROSBY

FAYETTE

McMULLEN

WHARTON

BORDEN

CALHOUN

SHELBY

MENARD

GILLESPIE

PARMER

WILSON

DICKENS

SCHLEICHER

GRIMES

FOARD

PANOLA

HASKELL

BRISCOE

RANDALL

DAWSON

MIDLAND

HOWARD

McLENNAN

GONZALES

GRAYSONRED RIVER

SWISHER

ROBERTS

HOCKLEY

ANDERSON

TARRANT

WALKER

LUBBOCK

VICTORIA

BASTROPJEFFERSON

SHERMAN

WHEELER

MITCHELL

YOAKUM

STERLINGWINKLER

TRINITY

HEMPHILL

WILBAR-GER

COMAN-CHE

WA

LLER

KARNES

LIPSCOMB

JACKSON

WILLIAMSON

REFUGIO

WILLACY

LOVING

AUSTIN

EASTLAND

HOPKINS

McCULLOCH

BLANCO

HARRISONSTEPHENS

ANGELINA

CALLAHAN

COLORADO

HANSFORD

KAUFMAN

BANDERA

PALO PINTO

MONTAGUE

HAMILTON

OCHILTREE

COMAL

LIMESTONE

SABINE

COCHRAN

FORT BEND

CHAMBERS

VAN ZANDT

WICHITA

JOHNSON

STONEWALL

HENDERSON

TITUS

FREESTONE

MONTGOMERY

HOOD

KENDALL

BRAZOS

GALVESTON

UPSHUR

HUTCHINSON

LAMPASAS

BURLESON

HARDEMAN

GUADALUPE

CHILD-RESS

ARM-STRONG

GLASS-COCK

NACOG-DOCHES

MARION

CALDWELL

MADISON

ORANGE

DELTA

RAINS

GREGG

CAMP

MO

RR

IS

FRA

NK

LIN

ROCK-WALL

COLLINGS-WORTH

THROCK-MORTON

SOMER-VEL

SANAUGUS-

TINE

SANJACINTO

JIMWELLS

SHACKEL-FORD

CHERO-KEE

NE

WTO

N

ROBERT-SON

WASHING-TON

ARAN-SASSAN

PATRICIO

Major Aquifers of Texas

OUTCROP (That part of a water-bearing rock layer which appears at the land surface)*DOWNDIP (That part of a water-bearing rock layer which dips below other rock layers)

NOTE: Chronology by Geologic age.

DISCLAIMERThis map was generated by the Texas Water Development Board

using GIS (Geographic Information Systems) software. No claims are made to the accuracy or completeness of the

information shown herein nor to its suitability for a particular use.The scale and location of all mapped data are approximate.0 30 60 90 12015

Miles

LegendOgallalaGulf Coast Edwards BFZ (outcrop)Edwards BFZ (downdip)Carrizo - Wilcox (outcrop)Carrizo - Wilcox (downdip)Trinity (outcrop)Trinity (downdip)Edwards - Trinity Plateau (outcrop)Edwards - Trinity Plateau (downdip)SeymourHueco - Mesilla BolsonCenozoic Pecos Alluvium

EA

SX

TT

ER

AW

M

EN

T

POLEDEV

BO

AR

D