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ZIP Code 77478 Water Quality
Texas · 50,184 people served · 21 water systems
C
FairZIP code 77478 is in Texas and is a mid-sized community from a drinking-water-service perspective, with 50,184 people served by 21 EPA-registered public water systems. It corresponds to SUGAR LAND.
Within ZIP code 77478, the EPA Safe Drinking Water Information System (SDWIS) records 3 health-based violations during the past five years across 21 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 77478
Water Systems Serving 77478
MEMORIAL MUD
PWSID: TX1011242
6,615 served
AUTUMN SHADOWS MOBILE HOME PARK
PWSID: TX0200435
150 served
SIENNA REGIONAL MUD
PWSID: TX0790373
0 served
SIENNA MANAGEMENT DISTRICT
PWSID: TX0790495
300 served
FORT BEND COUNTY MUD 115 RIVERSTONE
PWSID: TX0790403
1,527 served
HARRIS COUNTY MUD 168
PWSID: TX1011783
13,029 served
FORT BEND COUNTY MUD 253
PWSID: TX0790639
420 served
MONTGOMERY COUNTY MUD 170
PWSID: TX1700950
0 served
MONTGOMERY COUNTY MUD 162
PWSID: TX1700995
333 served
MONTGOMERY COUNTY MUD 100
PWSID: TX1700927
651 served
MONTGOMERY COUNTY MUD 163
PWSID: TX1700943
0 served
MONTGOMERY COUNTY MUD 140
PWSID: TX1700946
462 served
THE LANDING II SUBDIVISION
PWSID: TX1460200
15 served
FORT BEND COUNTY MUD 149
PWSID: TX0790517
4,638 served
FORT BEND COUNTY MUD 140 RIVERS EDGE
PWSID: TX0790445
2,547 served
FORT BEND COUNTY MUD 128
PWSID: TX0790498
10,974 served
FORT BEND COUNTY MUD 251
PWSID: TX0790629
276 served
MONTGOMERY COUNTY MUD 191
PWSID: TX1700933
3,099 served
BRAZORIA COUNTY MUD 82
PWSID: TX0200810
390 served
FORT BEND COUNTY MUD 129
PWSID: TX0790437
4,713 served
MONTGOMERY COUNTY MUD 159
PWSID: TX1700957
45 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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