Clay County, Indiana — public water systems

At a glance

15 active public water systems are filed under Clay County, Indiana in EPA's SDWIS records, together reporting 17,977 people served. The largest is Brazil City Water Works, which reports serving 12,000 people. 7 are community water systems serving people where they live; the other 8 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

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

Active systems

Population served

18K

Community systems

Groundwater share

100%

How does Clay County compare with other Indiana counties?

Clay County has the 58th-most active public water systems among the 109 counties listed for active Indiana systems in EPA records; among the 92 with 3 or more systems, the median has 26. Its systems report 17,977 people served in total, the 66th-largest county figure in the state and 0.3% of the statewide total. The average system here reports serving 1,199 people, about 18% below the Indiana average of 1,456. 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 Clay County's drinking water come from?

By primary water source, Clay County's active systems draw on groundwater (11, 73%) and purchased groundwater (4, 27%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 97% and 2.8% across Indiana. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Brazil City Water Works, draws primarily on groundwater.

What kinds of water systems operate in Clay County?

Clay County's active systems break down as 7 community systems (47%), 1 non-transient non-community systems (6.7%) and 7 transient non-community systems (47%). 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. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (60%) and local government (40%).

Water systems in Clay County

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Active public water systems in Clay County, Indiana
#	Water system	County	Population served	Type	Source
1	Brazil City Water Works	Clay	12,000	Community	Groundwater
2	Knightsville Water Works	Clay	1,523	Community	Purchased groundwater
3	Clay City Water Works	Clay	1,152	Community	Groundwater
4	Carbon Water Corporation	Clay	1,088	Community	Purchased groundwater
5	Center Point Water Works	Clay	625	Community	Purchased groundwater
6	Staunton Municipal Water	Clay	550	Community	Groundwater
7	Junction One Stop Incorporated	Clay	320	Transient non-community	Groundwater
8	Camp Krietenstein	Clay	150	Transient non-community	Groundwater
9	Cory Community Church of the Nazarene	Clay	132	Transient non-community	Groundwater
10	Union United Methodist Church & Parsonag	Clay	132	Transient non-community	Groundwater
11	Dietz Recreation Park, Inc..	Clay	80	Transient non-community	Groundwater
12	Saint Peters Community Church	Clay	76	Transient non-community	Groundwater
13	Izaak Walton League - Terre Haute	Clay	60	Transient non-community	Groundwater
14	Hickory Lake Water Management Org	Clay	45	Community	Purchased groundwater
15	Brickcraft LLC	Clay	44	Non-transient non-community	Groundwater

Clay County water systems: frequently asked questions

How many public water systems are in Clay County, Indiana?

EPA's SDWIS records file 15 active public water systems under Clay County, Indiana: 7 community systems (47%), 1 non-transient non-community systems (6.7%) and 7 transient non-community systems (47%).

Who supplies drinking water in Clay County, IN?

The largest community water systems filed under Clay County are Brazil City Water Works (12,000 people served), Knightsville Water Works (1,523 people served) and Clay City Water Works (1,152 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 Clay County's drinking water come from groundwater or surface water?

Of the 15 active public water systems in Clay County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Brazil City Water Works, uses groundwater.

Where can I find a water quality report for Clay 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. 7 community systems are filed under Clay 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 Clay 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 Indiana 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 Clay County, Indiana”, https://aquacensus.com/water-systems/indiana/clay (data as of October 1, 2026).