Tap Truth EPA drinking water records, in plain English

County drinking water records

Williamson County, TX drinking water systems

39 community water systems serve Williamson County, TX, reporting 741,682 people served in all. A system that also serves other counties counts all of its customers here.

8 of them (21%) had at least one health-based violation in the last 10 years. 12 systems still have one unresolved.

10 rely mainly on groundwater and 29 on surface water, counting water bought from other systems.

37 systems filed a lead service line inventory listing 2 lead lines, 193 galvanized lines that must be replaced and 10,748 lines of unknown material.

3 more systems are placed in Williamson County, TX by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
39
People served, sum of each system's own figure
741,682
Systems with a health-based violation, last 10 years
8
Systems with one unresolved
12
Lead service lines in inventories
2

Water systems serving Williamson County

39 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
City of Georgetown Georgetown, Santa Rita Ranch and 2 more and land outside them 191,639 Surface water 0 0 0
City of Round Rock Round Rock 130,662 Surface water 0 0 0
City of Leander Leander 98,330 Surface water 0 3 0
City of Cedar Park Cedar Park 86,939 Surface water 0 0 0
Manville WSC Hornsby Bend, Manor and 2 more and land outside them 39,648 Purchased surface water 5 1 0
Jonah Water SUD Hutto, Georgetown and 1 more and land outside them 29,861 Purchased surface water 2 0 0
City of Hutto Hutto 29,580 Purchased surface water 0 0 0
City of Taylor Taylor 20,622 Purchased surface water 0 0 0
Brushy Creek MUD Brushy Creek 18,314 Surface water 0 0 0
Sonterra MUD Sonterra 16,614 Purchased surface water 2 0 0
Jarrell Schwertner WSC Jarrell and Sonterra and land outside them 9,681 Purchased surface water 0 0 0
City of Liberty Hill Liberty Hill 8,777 Purchased surface water 4 1 0
Williamson County Wsid 3 Outside cities and towns 8,265 Purchased groundwater 0 0 0
Block House MUD Outside cities and towns 6,618 Purchased surface water 0 0 0
Williamson Travis County MUD 1 Outside cities and towns 5,793 Purchased surface water 0 0 0
Fern Bluff MUD Brushy Creek 5,682 Purchased surface water 0 0 0
Williamson County MUD 11 Outside cities and towns 4,248 Purchased surface water 0 1 0
Williamson County MUD 10 Outside cities and towns 3,513 Purchased surface water 0 0 0
City of Jarrell Jarrell 3,450 Purchased surface water 0 0 0
Paloma Lake MUD 1 Outside cities and towns 3,111 Purchased surface water 0 1 0
City of Bartlett Bartlett 2,950 Groundwater 3 6 No inventory
Vista Oaks MUD Outside cities and towns 2,724 Purchased surface water 0 0 0
Paloma Lake MUD 2 Outside cities and towns 2,265 Purchased surface water 0 0 0
City of Granger Granger and land outside it 1,914 Groundwater 0 1 0
Blessing Mobile Home Park Outside cities and towns 1,518 Purchased surface water 1 5 No inventory
Durham Park WSC Outside cities and towns 1,251 Groundwater 0 0 0
City of Florence Florence and land outside it 1,136 Purchased surface water 4 2 2
City of Thrall Thrall and land outside it 975 Purchased surface water 2 0 0
Tal Tex Brushy Creek 939 Purchased surface water 0 0 0
San Gabriel River Ranches Outside cities and towns 891 Groundwater 0 2 0
Walsh Ranch MUD Outside cities and towns 714 Purchased surface water 0 0 0
Brushy Bend Park Brushy Creek 645 Purchased surface water 0 1 0
Rio Ancho Subdivision Outside cities and towns 570 Groundwater 0 0 0
South San Gabriel Ranches Outside cities and towns 510 Groundwater 0 0 0
Sunny Creek MHC Outside cities and towns 510 Groundwater 0 0 0
High Gabriel WSC Outside cities and towns 492 Groundwater 0 1 0
Round Rock Ranch PUD Utility Company Round Rock 285 Purchased surface water 0 0 0
Liberty Greenline Outside cities and towns 46 Groundwater 0 0 0
Brushy Creek Regional Utility Authority Hutto Not reported Surface water 0 0 0

Systems placed by county record in Williamson County

3 systems

EPA has no service area map for some of these systems, and the maps it has for the others do not line up with their own records. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
County Cottage Lines County on record 29 Groundwater 0 0 No inventory
Brazos River Authority Granger Lake Regi County on record Not reported Surface water 0 0 0
Lone Star Rwa County on record Not reported Purchased surface water 0 0 No inventory

Cities and towns in Williamson County

18 places

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Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations