Gladden Water services the following cities in Houston Texas (not all areas in map are serviceable)

other states and cities served
ARIZONA PHOENIX
​ARKANSAS FAYETTEVILLE, FORT SMITH,  LITTLE ROCK - PINE BLUFF 
GEORGIA ATLANTA
ILLINOIS CHICAGO
IOWA  DES MOINES
LOUISIANA SHREVEPORT-BOSSIER, NEW ORLEANS, MONROE
MINNESOTA MINNEAPOLIS ST PAUL
MISSISSIPPI JACKSON
MISSOURI KANSAS CITY​, ST LOUIS
NEBRASKA  LINCOLN, OMAHA
NEVADA LAS VEGAS
NEW MEXICO ALBUQUERQUE
OKLAHOMA OKLAHOMA CITY, TULSA
TENNESSEE MEMPHIS, NASHVILLE
TEXAS ABILENE​, AUSTIN ROUND ROCK GEORGETOWN, CORPUS CHRISTI, DALLAS FORT WORTH, EL PASO, HOUSTON, KILLEEN,  SAN ANTONIO, MIDLAND-ODESSA, SHERMAN-DENISON,  STEPHENVILLE, TYLER-LONGVIEW, WACO TEMPLE