Williamson County, Texas — public water systems

50 active public water systems serve Williamson County, reporting 702.6K people served.

Dataset updated July 2026 . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

Population served

702.6K

Community systems

Groundwater share

36%

Water systems in Williamson County

Active public water systems in Williamson County, Texas
#	Water system	County	Population served	Type	Source
1	City of Georgetown	Williamson	191,639	Community	Surface water
2	City of Round Rock	Williamson	130,662	Community	Surface water
3	City of Leander	Williamson	98,330	Community	Surface water
4	City of Cedar Park	Williamson	86,939	Community	Surface water
5	Jonah Water Sud	Williamson	29,861	Community	Purchased surface water
6	City of Hutto	Williamson	29,580	Community	Purchased surface water
7	City of Taylor	Williamson	20,622	Community	Purchased surface water
8	Brushy Creek MUD	Williamson	18,314	Community	Surface water
9	Sonterra MUD	Williamson	16,614	Community	Purchased surface water
10	Jarrell Schwertner WSC	Williamson	9,681	Community	Purchased surface water
11	City of Liberty Hill	Williamson	8,777	Community	Purchased surface water
12	Williamson County Wsid 3	Williamson	8,265	Community	Purchased groundwater
13	Block House MUD	Williamson	6,618	Community	Purchased surface water
14	Williamson Travis County MUD 1	Williamson	5,793	Community	Purchased surface water
15	Fern Bluff MUD	Williamson	5,682	Community	Purchased surface water
16	Williamson County MUD 11	Williamson	4,248	Community	Purchased surface water
17	Williamson County MUD 10	Williamson	3,513	Community	Purchased surface water
18	City of Jarrell	Williamson	3,450	Community	Purchased surface water
19	Paloma Lake MUD 1	Williamson	3,111	Community	Purchased surface water
20	City of Bartlett	Williamson	2,950	Community	Groundwater
21	Vista Oaks MUD	Williamson	2,724	Community	Purchased surface water
22	Paloma Lake MUD 2	Williamson	2,265	Community	Purchased surface water
23	City of Granger	Williamson	1,914	Community	Groundwater
24	Blessing Mobile Home Park	Williamson	1,518	Community	Purchased surface water
25	Durham Park WSC	Williamson	1,251	Community	Groundwater
26	City of Florence	Williamson	1,136	Community	Purchased surface water
27	City of Thrall	Williamson	975	Community	Purchased surface water
28	Tal Tex	Williamson	939	Community	Purchased surface water
29	San Gabriel River Ranches	Williamson	891	Community	Groundwater
30	Walsh Ranch MUD	Williamson	714	Community	Purchased surface water
31	Brushy Bend Park	Williamson	645	Community	Purchased surface water
32	South San Gabriel Ranches	Williamson	510	Community	Groundwater
33	High Gabriel WSC	Williamson	492	Community	Groundwater
34	Inner Space Cavern	Williamson	310	Transient non-community	Groundwater
35	San Gabriel River Rv Camp Resort	Williamson	300	Transient non-community	Groundwater
36	Round Rock Ranch PUD Utility Company	Williamson	285	Community	Purchased surface water
37	Smilin V Ranch	Williamson	256	Transient non-community	Groundwater
38	Mesa Rosa Restaurant	Williamson	250	Transient non-community	Groundwater
39	Community Christian Church	Williamson	180	Transient non-community	Groundwater
40	Txdps Tactical Training Center	Williamson	124	Transient non-community	Groundwater
41	Round Rock Roller Rink	Williamson	100	Transient non-community	Groundwater
42	Liberty Greenline	Williamson	46	Community	Groundwater
43	200 County Road 314	Williamson	37	Non-transient non-community	Groundwater
44	County Cottage Lines	Williamson	29	Community	Groundwater
45	Live Oak Water Delivery	Williamson	25	Transient non-community	Purchased surface water
46	Premier Athletic Complex	Williamson	25	Transient non-community	Purchased surface water
47	Juniper Rv Park	Williamson	21	Transient non-community	Groundwater