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ZIP Code 78840 Water Quality
Texas · 38,235 people served · 8 water systems
F
FailingZIP code 78840 is in Texas and is a small city from a drinking-water-service perspective, with 38,235 people served by 8 EPA-registered public water systems. It corresponds to DEL RIO.
Within ZIP code 78840, the EPA Safe Drinking Water Information System (SDWIS) records 79 health-based violations during the past five years across 8 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 78840
Water Systems Serving 78840
HOLIDAY TRAV L PARK
PWSID: TX2330022
660 served
TIERRA DEL LAGO
PWSID: TX2330013
81 served
DEL RIO UTILITIES COMMISSION
PWSID: TX2330001
36,506 served
AMERICAN CAMP GROUND
PWSID: TX2330023
381 served
DEL GRANDE MOBILE HOME PARK
PWSID: TX2330050
288 served
DEVILS SHORES WSC
PWSID: TX2330021
97 served
LAGO VISTA WATER SYSTEM
PWSID: TX2330055
72 served
SAN PEDRO CANYON SUBDIVISION - UPPER
PWSID: TX2330011
150 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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