Tapcensus

Water quality for ZIP code 77459

ZIP 77459 covers Missouri City, Sienna, and Sugar Land in Fort Bend County, Texas, one of 21 ZIP codes in the county. 294 active public water systems serve the county; 119 had an EPA violation in the past three years.

Most likely your provider

Sienna MUD 12 TX0790494 · Community water system · Ground water
Serves 4,311 people Rules violated, past 3 years 0 Last sanitary survey Mar 10, 2025 Distance 1.1 mi

Your location is within the outer bounds of this system's EPA service area.

View system details EPA facility report

Other community water systems in Fort Bend County

179 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Sienna Plantation Management District
 4,179 0 0.6 mi
Sienna MUD 10
 7,824 1 1.3 mi
Sienna Management District
 300 0 1.4 mi
Fort Bend County MUD 47
 2,874 0 1.6 mi
City of Missouri City Mustang Bayou Wate
 9,147 0 1.6 mi
Fort Bend County MUD 49
 1,080 0 1.7 mi
Fort Bend County MUD 48
 3,969 0 1.9 mi
City of Missouri City
 4,847 1 1.9 mi
Palmer Plantation MUD 2
 2,559 0 2.1 mi
Palmer Plantation MUD 1
 2,031 1 2.2 mi
Fort Bend County MUD 149
 4,638 0 2.2 mi
Sienna MUD 3
 7,365 1 2.5 mi
Fort Bend County MUD 46
 2,247 0 2.7 mi
Olympia Falls Water Plant
 594 0 2.7 mi
Fort Bend County MUD 129
 4,713 0 2.9 mi
Fort Bend County MUD 23
 13,695 0 3.1 mi
Thunderbird Utility District 1
 4,203 3 3.2 mi
Sienna MUD 4
 6,435 1 3.3 mi
Thunderbird Utility District System 2
 1,821 0 3.4 mi
Fort Bend County MUD 24
 3,177 0 3.5 mi
Fort Bend County MUD 115 Riverstone
 1,527 1 3.7 mi
Quail Valley Utility District
 14,409 0 3.7 mi
City of Arcola
 1,599 0 4.2 mi
Fort Bend County MUD 128
 10,974 1 4.2 mi
Sienna Regional MUD
 0 0 4.2 mi
All 180 community water systems in Fort Bend County
Non-community systems in Fort Bend County (114: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Axxiom Manufacturing
 75 0 0
Teal Bend Shopping Center
 275 0 0
Childrens Choice Learning Center
 100 5 2
Brazos River Retreat RV Park
 102 1 0
Houston Southwest Airport
 57 2 1
Arcola Heights
 25 1 0
Dollar General Arcola
 25 0 0
Parks Fresno Food Market
 200 1 0
Word of Restoration Church
 1,000 1 1
Nalco Fresno Facility
 160 0 0
Greater Houston Gun Club
 50 0 0
River Pointe Golf Club
 30 0 0
Nrg W a Parish Electric Generating Stati
 275 0 0
Nrg Texas W a Parish Gas Plant
 50 0 0
Flexicore of Texas
 157 2 0
Nouryon Surface Chemistry
 145 1 0
Chevron Handi Plus 52
 200 2 1
The George Ranch
 191 0 0
Jiffy Lube 2879
 25 2 1
USA RV Park
 180 1 0
Crabb River Road Exxon
 300 0 0
Alleyton Resource CO
 125 4 1
Cornerstone Community Bible Church
 400 1 0
Parkway Crossing
 50 2 2
Maryam Islamic Center at New Territory
 120 2 1
Masters Vessel Ministries
 100 1 1
Shiloh RV Park
 131 3 1
10115 Belknap Road
 25 0 0
River City RV Park
 50 0 0
Tpwd Brazos Bend State Park 2
 250 3 2
Lamar Cisd Manford Williams Elementary S
 753 0 0
Brazos Bend Storage and RV Park
 72 0 0
Harlem Park Sports Facilities
 150 1 0
Tpwd Brazos Bend State Park 1
 150 1 0
Plantation Crossing Water Plant
 150 1 0
The Redeemed Christian Church of God
 120 4 0
LA Banjee Exxon
 80 0 0
Dollar General Damon Store 21407
 200 0 0
Funshine Academy
 100 1 1
Brazos Bend Home & Ranch
 50 3 1
Country Village
 150 2 0
Plantation Furniture
 60 1 0
Kep Food Store #2
 250 2 0
New Wine Chapel
 150 9 2
Braman Winery
 25 0 0
Nicks Groceries
 150 0 0
Hwy 36 Lakeview RV Resort
 160 3 1
Friendship Assembly of God
 40 0 0
Faith Methodist Church-Richmond
 200 0 0
Foster Creek Veterinary Hospital
 60 0 0
All non-community systems
About this data

Water systems are matched to Fort Bend County, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.

ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Texas records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.