Water quality for ZIP code 77521
ZIP 77521 covers Baytown and Mont Belvieu in Harris County, Texas, one of 132 ZIP codes in the county. 1,320 active public water systems serve the county; 683 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Harris County
713 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| O Aces MHP |
72 | 3 | 0.8 mi | |
| Lazy Acres Mobile Home Park |
75 | 3 | 0.9 mi | |
| Barkaloo Homeowners Association |
42 | 6 | 1.0 mi | |
| Spring Meadows MUD |
4,224 | 0 | 1.1 mi | |
| Lake MUD |
6,048 | 0 | 2.1 mi | |
| Delynn Water System |
55 | 2 | 2.2 mi | |
| Harris County MUD 213-A |
1,926 | 0 | 2.4 mi | |
| McGee Place |
153 | 2 | 2.4 mi | |
| Sjolander Road Mobile Home Park |
146 | 2 | 2.5 mi | |
| Hunters Village Subdivision |
174 | 0 | 2.5 mi | |
| Cedar Bayou Park |
294 | 4 | 2.5 mi | |
| Harris County Fwsd 1a |
2,640 | 1 | 2.6 mi | |
| Canal Terrace Subdivision |
480 | 0 | 2.6 mi | |
| Country Living Mobile Home Park |
72 | 4 | 2.8 mi | |
| Cedar Bayou Estates |
60 | 0 | 2.8 mi | |
| Harris County Fwsd 27 |
2,190 | 1 | 3.0 mi | |
| Chinquapin Preparatory School |
148 | 1 | 3.2 mi | |
| Country Terrace Subdivision |
1,677 | 4 | 3.3 mi | |
| Glenwood Mobile Home Subdivision |
234 | 2 | 3.5 mi | |
| Apacheland Mobile Home Subdivision |
207 | 0 | 3.7 mi | |
| Harris County Fwsd 1b |
672 | 5 | 4.1 mi | |
| Roving Meadows Water System |
105 | 3 | 4.1 mi | |
| Rollan Heights Subdivision |
53 | 0 | 4.2 mi | |
| Highland Ridge Subdivision |
591 | 0 | 4.4 mi | |
| Harris County Wcid 1 |
8,559 | 0 | 5.1 mi |
Non-community systems in Harris County (606: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Harris 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.