HARRIS COUNTY MUD 257
Texas — Community Water System — PWSID: TX1012985
System Information
| PWSID | TX1012985 |
| System Name | HARRIS COUNTY MUD 257 |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 06 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Jan 17, 1998 |
| Last Reported | Jan 6, 2026 |
Location & Contact
| State | Texas |
| City | HOUSTON |
| ZIP Code | 77056-3044 |
| Address | 1300 POST OAK BLVD STE 2400 |
| Organization | COLLINS, MARK, B |
| Phone | 713-623-4531 |
Population & Service
| Population Served | 3,501 |
| Service Connections | 1,169 |
Drinking Water Violations (12)
This water system has 12 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 1, 2024 | Aug 31, 2024 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Aug 31, 2024 | Revised Total Coliform Rule |
| Aug 1, 2024 | Aug 31, 2024 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Aug 31, 2024 | Revised Total Coliform Rule |
| Aug 1, 2024 | Aug 31, 2024 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Aug 31, 2024 | Revised Total Coliform Rule |
| Aug 1, 2024 | Aug 31, 2024 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Aug 31, 2024 | Revised Total Coliform Rule |
| Apr 1, 2016 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 30, 2016 | Lead and Copper Rule |
| Apr 1, 2016 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 30, 2016 | Lead and Copper Rule |
| Apr 1, 2016 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 30, 2016 | Lead and Copper Rule |
| Apr 1, 2016 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 30, 2016 | Lead and Copper Rule |
| Dec 30, 2014 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 12, 2015 | Lead and Copper Rule |
| Dec 30, 2014 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 12, 2015 | Lead and Copper Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | May 13, 2009 | Nitrate Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | May 13, 2009 | Nitrate Rule |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.