Caldwell County, Texas — public water systems
At a glance
8 active public water systems are filed under Caldwell County, Texas in EPA's SDWIS records, together reporting 47,011 people served. The largest is City of Lockhart, which reports serving 18,800 people. All 8 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
8
Population served
47K
Community systems
8
Groundwater share
25%
How does Caldwell County compare with other Texas counties?
Caldwell County has the 147th-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 47,011 people served in total, the 71st-largest county figure in the state and 0.1% of the statewide total. The average system here reports serving 5,876 people, about 23% above 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 Caldwell County's drinking water come from?
By primary water source, Caldwell County's active systems draw on purchased surface water (4, 50%), surface water (2, 25%), groundwater under influence of surface water (1, 13%) and purchased groundwater (1, 13%). Overall, 25% rely mainly on groundwater (including purchased groundwater) and 75% on surface water, compared with 78% and 21% across Texas. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. The county's largest system, City of Lockhart, draws primarily on purchased surface water.
What kinds of water systems operate in Caldwell County?
Caldwell County's active systems break down as 8 community systems (100%). 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. EPA lists their owner types as local government (100%).
Water systems in Caldwell County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | City of Lockhart | Caldwell | 18,800 | Community | Purchased surface water |
| 2 | Maxwell Sud | Caldwell | 16,104 | Community | Purchased surface water |
| 3 | City of Luling | Caldwell | 7,364 | Community | Purchased surface water |
| 4 | Martindale WSC | Caldwell | 3,045 | Community | Purchased surface water |
| 5 | Tri Community WSC | Caldwell | 1,698 | Community | Groundwater under influence of surface water |
Caldwell County water systems: frequently asked questions
How many public water systems are in Caldwell County, Texas?
EPA's SDWIS records file 8 active public water systems under Caldwell County, Texas: 8 community systems (100%).
Who supplies drinking water in Caldwell County, TX?
The largest community water systems filed under Caldwell County are City of Lockhart (18,800 people served), Maxwell Sud (16,104 people served) and City of Luling (7,364 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 Caldwell County's drinking water come from groundwater or surface water?
Of the 8 active public water systems in Caldwell County, 25% draw mainly on groundwater and 75% on surface water, counting purchased supplies. The largest system, City of Lockhart, uses purchased surface water.
Where can I find a water quality report for Caldwell 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. 8 community systems are filed under Caldwell 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 Caldwell 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 Caldwell County, Texas”, https://aquacensus.com/water-systems/texas/caldwell (data as of October 1, 2026).