Public water system record
City of Missouri City
Serves Sienna, Fort Bend County, TX · 4,847 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for City of Missouri City in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- City of Missouri City buys its water from Sienna Regional MUD.
- Record on file since 2012, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 1,620 service lines.
Check whether City of Missouri City serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Full record since 2012
EPA's records for City of Missouri City go back to 2012. Before October 19, 2016 they list no health-based violations and 3 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2010 to October 18, 2016 | 0 | 3 |
| 2020s | 0 | 1 |
Where the water comes from
City of Missouri City buys its water from Sienna Regional MUD. It lists no wells or intakes of its own.
Buys water from
- Sienna Regional MUD Sugar Land, TX
Annual water quality report
City of Missouri City must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Texas.
Certified drinking water labs by state EPA guidance for private wells