Water quality for ZIP code 77204
ZIP 77204 covers Houston in Harris County, Texas, one of 132 ZIP codes in the county. 1,320 active public water systems serve the county; 679 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Harris County
713 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| City of Pasadena |
152,000 | 1 | |
| Clear Lake City Water Authority |
89,702 | 0 | |
| City of Baytown |
86,004 | 1 | |
| City of Houston UD 5 Kingwood |
80,073 | 0 | |
| Harris County MUD 165 |
40,503 | 0 | |
| City of la Porte |
36,569 | 1 | |
| City of Deer Park |
34,495 | 0 | |
| Northwest Harris County MUD 5 |
25,425 | 0 | |
| City of Katy |
25,253 | 1 | |
| Bridgestone MUD |
24,528 | 1 | |
| Timber Lane Utility District |
24,507 | 2 | |
| Harris County Fwsd 51 |
19,671 | 1 | |
| Cimarron MUD |
19,338 | 0 | |
| City of West University Place |
19,200 | 3 | |
| Harris County MUD 82 |
18,990 | 1 | |
| Clear Brook City MUD |
18,246 | 0 | |
| Northwest Park MUD |
18,168 | 1 | |
| City of Bellaire |
18,090 | 3 | |
| Harris Montgomery Counties MUD 386 |
18,018 | 0 | |
| Harris County MUD 53 |
17,856 | 1 | |
| City of Tomball |
17,532 | 0 | |
| City of South Houston |
17,397 | 1 | |
| Harris County MUD 26 |
17,178 | 1 | |
| Harris County MUD 71 |
17,079 | 0 | |
| Harris County MUD 167 |
16,761 | 1 |
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, largest 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.
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.