Tapcensus

Texas

Williamson County drinking water quality

52 active public water systems serve 703,146 people in Williamson County. 18 are compliant, 34 had at least one EPA violation in the past three years, 2 are designated serious violators, and 1 carries a health flag.

Active systems 52 40 community systems
People served 703K by public water systems
Systems with violations 34 65% of active systems, past 3 years
Serious violators 2 1 systems carry a health flag

Needs attention

City of Bartlett TX2460006 · Community water system · Serves 2,950 7 rules violated in the past three years. Unresolved: Lead and Copper Rule, Lead and Copper Rule Revisions, Public Notice Rule and Revised PN Rule, and Consumer Confidence Rule.
City of Florence TX2460005 · Community water system · Serves 1,136 5 rules violated in the past three years. Unresolved: Ground Water Rule, Lead and Copper Rule Revisions, and Public Notice Rule and Revised PN Rule.

Community water systems

40 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
City of Georgetown
 191,639 3 0
City of Round Rock
 130,662 0 0
City of Leander
 98,330 4 3
City of Cedar Park
 86,939 0 0
Jonah Water SUD
 29,861 1 0
City of Hutto
 29,580 0 0
City of Taylor
 20,622 0 0
Brushy Creek MUD
 18,314 0 0
Sonterra MUD
 16,614 3 0
Jarrell Schwertner WSC
 9,681 0 0
City of Liberty Hill
 8,777 2 0
Williamson County Wsid 3
 8,265 1 0
Block House MUD
 6,618 0 0
Williamson Travis County MUD 1
 5,793 1 0
Fern Bluff MUD
 5,682 0 0
Williamson County MUD 11
 4,248 1 0
Williamson County MUD 10
 3,513 1 0
City of Jarrell
 3,450 2 0
Paloma Lake MUD 1
 3,111 1 0
City of Bartlett
 2,950 7 4
Vista Oaks MUD
 2,724 0 0
Paloma Lake MUD 2
 2,265 1 0
City of Granger
 1,914 5 2
Blessing Mobile Home Park
 1,518 5 0
Durham Park WSC
 1,251 2 0
City of Florence
 1,136 5 3
City of Thrall
 975 1 0
Tal Tex
 939 0 0
San Gabriel River Ranches
 891 2 1
Walsh Ranch MUD
 714 0 0
Brushy Bend Park
 645 0 0
South San Gabriel Ranches
 510 0 0
Sunny Creek MHC
 510 0 0
High Gabriel WSC
 492 3 1
Round Rock Ranch Pud Utility
 285 1 0
Liberty Greenline
 46 1 0
County Cottage Lines
 29 1 0
Brazos River Authority Granger Lake Regi
 0 0 0
Brushy Creek Regional Utility Authority
 0 0 0
Lone Star Rwa
 0 0 0
Non-community systems (12: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Inner Space Cavern
 310 0 0
San Gabriel River RV Camp Resort
 300 1 0
Smilin V Ranch
 256 1 0
Mesa Rosa Restaurant
 250 2 1
Community Christian Church
 180 1 0
Txdps Tactical Training Center
 124 2 0
Round Rock Roller Rink
 100 1 1
200 County Road 314
 37 7 1
Live Oak Water Delivery
 25 2 0
Premier Athletic Complex
 25 2 0
Simple Water Solutions
 25 1 0
Juniper RV Park
 21 2 0
Inactive systems (88, 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.