Tapcensus

Texas

Starr County drinking water quality

11 active public water systems serve 71,481 people in Starr County. 1 are compliant, 10 had at least one EPA violation in the past three years, 3 are designated serious violators, and 4 carry a health flag.

Active systems 11 9 community systems
People served 71K by public water systems
Systems with violations 10 91% of active systems, past 3 years
Serious violators 3 4 systems carry a health flag

Needs attention

City of la Grulla TX2140006 · Community water system · Serves 11,250 7 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR), Lead and Copper Rule (LCR), Lead and Copper Rule Revisions (LCRR), Public Notification Rule, Revised Total Coliform Rule (RTCR), and TTHM (Total Trihalomethanes).
EL Sauz WSC TX2140028 · Community water system · Serves 2,223 4 rules violated in the past three years. Unresolved: Lead and Copper Rule (LCR).
1017 Cafe TX2140030 · Transient non-community system · Serves 25 4 rules violated in the past three years. Unresolved: Groundwater Rule (GWR), Public Notification Rule, and Revised Total Coliform Rule (RTCR).
Union WSC TX2140004 · Community water system · Serves 5,793 5 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR) and Public Notification Rule.
Falcon Rural WSC TX2140003 · Community water system · Serves 3,600 4 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR), Lead and Copper Rule (LCR), Lead and Copper Rule Revisions (LCRR), and Public Notification Rule.

Community water systems

9 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
City of Roma
 19,464 8 1
City of Rio Grande City
 18,912 3 1
City of la Grulla
 11,250 7 6
Rio WSC
 6,939 4 1
Union WSC
 5,793 5 1
Falcon Rural WSC
 3,600 4 3
EL Tanque WSC
 3,000 0 0
EL Sauz WSC
 2,223 4 1
Ibwc Falcon Village
 48 6 2
Non-community systems (2: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
San Isidro Isd
 227 5 3
1017 Cafe
 25 4 3
Inactive systems (11, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Texas records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.