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ZIP Code 78009 Water Quality
Texas · 7,418 people served · 7 water systems
C
FairZIP code 78009 is in Texas and is a small town from a drinking-water-service perspective, with 7,418 people served by 7 EPA-registered public water systems. It corresponds to CASTROVILLE.
Within ZIP code 78009, the EPA Safe Drinking Water Information System (SDWIS) records 4 health-based violations during the past five years across 7 water systems serving this postal area. The grade of C 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 78009
Water Systems Serving 78009
VALLEY MOBILE HOME PROPERTIES
PWSID: TX1630011
219 served
OLD HWY 90 N RIDGE W SYSTEM
PWSID: TX1630041
246 served
OLD HWY 90 WATER SERVICE
PWSID: TX1630035
1,215 served
HIGHWAY 90 RANCH WSC
PWSID: TX1630014
412 served
MEDINA VALLEY WATER SUPPLY CO
PWSID: TX1630036
255 served
CITY OF CASTROVILLE
PWSID: TX1630005
3,913 served
MEDINA RIVER WEST WSC
PWSID: TX1630028
1,158 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.
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