City page · Texas
Katy, Texas tap water
Katy, Texas is associated with 5 active community water system(s) in EPA SDWIS data (systems may serve multiple places or buy/sell water). The largest listed system by population served is CITY OF KATY (25,253 people). No health-based violation records appear in the recent slice indexed for those systems—still verify with local CCRs. Private wells are not regulated like public systems and are not covered here.
Counties seen in EPA geo data: Dallas, Fort Bend, Harris, Montgomery
Primary municipal water system
Texas EPA geographic extracts in this data quarter list county service areas, not city served. We feature the main City of Katy (or closest municipal) system first. Nearby MUDs and districts are listed separately below. Use your water bill/CCR to identify your exact PWSID.
| Utility | PWSID | Population | Primary source | Recent viol. indexed | Health-based |
|---|---|---|---|---|---|
| CITY OF KATYPrimary | TX1010017 | 25,253 | Groundwater (wells) | 1 | 0 |
Other water systems in the area — 4 nearby MUD/district/other systems
These systems are associated with Katy by name/record-city heuristics or serve nearby districts. They are sorted by population served.
| Utility | PWSID | Population | Primary source | Recent viol. indexed | Health-based |
|---|---|---|---|---|---|
| MASON CREEK UTILITY DISTRICT | TX1010379 | 8,900 | Groundwater (wells) | 0 | 0 |
| FORT BEND COUNTY MUD 5 | TX0790482 | 4,665 | Groundwater (wells) | 0 | 0 |
| LANCASTER MUD 1 | TX0570176 | 2,685 | Purchased surface water | 0 | 0 |
| MONTGOMERY COUNTY MUD 137 | TX1700840 | 2,409 | Groundwater (wells) | 0 | 0 |
FAQs for Katy
Who provides tap water in Katy, TX?
The primary municipal system highlighted here is CITY OF KATY (PWSID TX1010017). Katy may also have nearby MUDs, districts, or supply corporations; your bill or CCR names the system that serves your address.
How do I read health-based violations?
Health-based violations involve MCL, MRDL, or treatment technique issues. A past violation does not automatically mean current water is unsafe—check status, dates, and your utility’s public notices/CCR.
What about apartments or purchased water?
Some systems buy water from wholesalers. Your retail utility is still responsible for delivering finished water and issuing the CCR for customers.
Where can I get official documents?
Search your utility name + “Consumer Confidence Report”, check Texas Commission on Environmental Quality (TCEQ) drinking water resources, and use EPA’s ECHO detailed facility report links on each utility page.
EPA & data citations
- EPA ECHO SDWA Data Downloads — data dictionary & summary
- County geography from
SDWA_GEOGRAPHIC_AREAS.csv; city pages use municipal-name heuristics (Texas city-served fields are sparse) - Active community systems from
SDWA_PUB_WATER_SYSTEMS.csv - See also: Methodology