McMullen County, Texas — public water systems
At a glance
3 active public water systems are filed under McMullen County, Texas in EPA's SDWIS records, together reporting 1,051 people served. The largest is Mcmullen County Tilden, which reports serving 618 people. 2 are community water systems serving people where they live; the other 1 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
3
Population served
1.1K
Community systems
2
Groundwater share
100%
How does McMullen County compare with other Texas counties?
McMullen County has the 229th-most active public water systems among the 309 counties listed for active Texas systems in EPA records; among the 234 with 3 or more systems, the median has 12. Its systems report 1,051 people served in total, the 243rd-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 350 people, well below the Texas average of 4,789. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does McMullen County's drinking water come from?
By primary water source, McMullen County's active systems draw on groundwater (2, 67%) and purchased groundwater (1, 33%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 78% and 21% across Texas. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Mcmullen County Tilden, draws primarily on groundwater.
What kinds of water systems operate in McMullen County?
McMullen County's active systems break down as 2 community systems (67%) and 1 transient non-community systems (33%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as local government (67%) and state government (33%).
Water systems in McMullen County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Mcmullen County Tilden | McMullen | 618 | Community | Groundwater |
| 2 | Mcmullen County Calliham | McMullen | 300 | Community | Groundwater |
| 3 | Tpwd Choke Canyon State Park Calliham | McMullen | 133 | Transient non-community | Purchased groundwater |
McMullen County water systems: frequently asked questions
How many public water systems are in McMullen County, Texas?
EPA's SDWIS records file 3 active public water systems under McMullen County, Texas: 2 community systems (67%) and 1 transient non-community systems (33%).
Who supplies drinking water in McMullen County, TX?
The largest community water systems filed under McMullen County are Mcmullen County Tilden (618 people served) and Mcmullen County Calliham (300 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does McMullen County's drinking water come from groundwater or surface water?
Of the 3 active public water systems in McMullen County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Mcmullen County Tilden, uses groundwater.
Where can I find a water quality report for McMullen County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 2 community systems are filed under McMullen County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in McMullen County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Texas water systems
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in McMullen County, Texas”, https://aquacensus.com/water-systems/texas/mcmullen (data as of October 1, 2026).