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ZIP Code 77251 Water Quality
Texas · 3,080,790 people served · 7 water systems
F
FailingZIP code 77251 is in Texas and is a major metropolitan area from a drinking-water-service perspective, with 3,080,790 people served by 7 EPA-registered public water systems. It corresponds to HOUSTON.
Within ZIP code 77251, the EPA Safe Drinking Water Information System (SDWIS) records 12 health-based violations during the past five years across 7 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 77251
Water Systems Serving 77251
RICE UNIVERSITY
PWSID: TX1010908
8,415 served
CITY OF HOUSTON WILLOW CHASE
PWSID: TX1011902
14,169 served
CITY OF HOUSTON DISTRICT 73
PWSID: TX1011585
6,105 served
CITY OF HOUSTON BELLEAU WOODS
PWSID: TX1011594
381 served
CITY OF HOUSTON DISTRICT 82
PWSID: TX1011593
1,104 served
CITY OF HOUSTON UD 5 - KINGWOOD
PWSID: TX1010348
80,073 served
CITY OF HOUSTON
PWSID: TX1010013
2,970,543 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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