ZIP Code 78723 Water Quality

Texas · 236,397 people served · 371 water systems

Failing

ZIP code 78723 is in Texas and is a mid-sized community from a drinking-water-service perspective, with 236,397 people served by 371 EPA-registered public water systems. It corresponds to AUSTIN.

Within ZIP code 78723, the EPA Safe Drinking Water Information System (SDWIS) records 127 health-based violations during the past five years across 371 water systems serving this postal area. The grade of F reflects the aggregate compliance pattern, not the current daily water quality.

Last updated: 2026-05-18 · Source: EPA SDWIS

ZIP Code Location

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Cities in ZIP 78723

AUSTIN

Water Systems Serving 78723

HERITAGE OAKS ADDITION

PWSID: TX2200090

93 served

BLUE MOUND ESTATES

PWSID: TX2200100

111 served

SOUTHWOOD ADDITION

PWSID: TX2200108

234 served

CARRIAGE TRAIL SUBDIVISION

PWSID: TX0360093

96 served

PLANTATION ON COTTON BAYOU

PWSID: TX0360096

1,557 served

HACKBERRY CREEK SUBDIVISION

PWSID: TX0360100

176 served

WOODLAND HILLS

PWSID: TX0610084

114 served

SAN GABRIEL RIVER RANCHES

PWSID: TX2460046

891 served

TRES PALACIOS OAKS SUBDIVISION

PWSID: TX1610017

774 served

OAK HOLLOW SUBDIVISION

PWSID: TX1610031

78 served

TIDEWATER OAKS SUBDIVISION

PWSID: TX1610033

189 served

FOREST ACRES GARDENS

PWSID: TX2200186

420 served

LUNAR LANE WATER SYSTEM

PWSID: TX2200208

690 served

SILVER CREEK ESTATES

PWSID: TX2200277

171 served

RANCH OAKS SUBDIVISION

PWSID: TX2200291

561 served

AVONDALE HEIGHTS

PWSID: TX2200184

423 served

COTTONWOOD HILLS ESTATES

PWSID: TX2200045

303 served

LINKWOOD ESTATES SUBDIVISION

PWSID: TX2200061

426 served

EAGLE CREEK RANCH

PWSID: TX2470022

2,409 served

SOUTH SAN GABRIEL RANCHES

PWSID: TX2460026

510 served

RIVERCREST WATER

PWSID: TX1550089

378 served

SMITH WATER

PWSID: TX1550091

111 served

TUBBS WATER SYSTEM

PWSID: TX1550125

57 served

GOODALL WATER SYSTEM

PWSID: TX1550126

168 served

NORTH BOSQUE ESTATES WATER SUPPLY

PWSID: TX1550129

330 served

BEHRINGER WATER SYSTEM

PWSID: TX1550130

72 served

PYSSENS LIVE OAK ESTATES SUBDIVISION

PWSID: TX2410010

165 served

LAKE VISTA UTILITY

PWSID: TX1490017

834 served

PECAN UTILITIES OAK RIDGE SUBDIVISION

PWSID: TX1500043

588 served

GREENFIELDS ON SQUAW CREEK

PWSID: TX2130036

78 served

CINNAMON RIDGE

PWSID: TX0610209

501 served

DOVE HOLLOW WATER SYSTEM

PWSID: TX0610210

246 served

WILLOW WOOD ADDITION MEADOW VISTA

PWSID: TX0610212

375 served

SPANISH OAKS ADDITION

PWSID: TX0610214

111 served

SPRING HILL ESTATES

PWSID: TX0610218

237 served

OLD STONY ESTATES

PWSID: TX0610224

54 served

PONDEROSA RANCH

PWSID: TX0610233

456 served

RADECKE ROAD WATER SYSTEM

PWSID: TX0610234

42 served

QUINLAN NORTH SUBDIVISION

PWSID: TX1160063

228 served

RIVERWOOD FOREST

PWSID: TX0790405

816 served

BERRY HILL ESTATES

PWSID: TX1011860

144 served

ROLLING OAKS

PWSID: TX1011861

291 served

TASFIELD

PWSID: TX1011865

222 served

MOUNTAIN LAKES ADDITION

PWSID: TX0720037

1,347 served

WOODLANDS OF PARKER COUNTY & OLD BANK

PWSID: TX1840138

234 served

LAIRD ESTATES

PWSID: TX1700015

60 served

ENCHANTED FOREST

PWSID: TX1700040

69 served

LAKE CONROE WEST

PWSID: TX1700041

180 served

PINEY POINT SUBDIVISION

PWSID: TX1700061

252 served

PINE VISTA MOBILE HOME VILLAGE

PWSID: TX1700078

246 served

About ZIP-code water data

Postal-code level water quality data is built up from the underlying water systems — multiple ZIPs may share a single utility, and a single ZIP can span multiple utilities. For property-level information, contact the specific utility serving your address. EPA data on this page was last refreshed on 2026-05-18.