Public water system · IN5211006
ActiveKnightsville Water Works
At a glance
Knightsville Water Works (PWSID IN5211006) is an active community water system in Clay County, Indiana. It reports serving 1,523 people through 565 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,523
Service connections
565
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Knightsville Water Works compare with other water systems in Clay County?
By EPA's size categories, Knightsville Water Works is a small system (501 to 3,300 people). Clay County has 15 active public water systems, and Knightsville Water Works is the 2nd-largest of them by population served. Its population served is about 27% above the county average of 1,199 people per system, and accounts for 8.5% of the 17,977 people reported by systems filed under the county. Across Indiana, the 3,969 active systems average 1,456 people each. Nationally, the average active community water system reports serving 6,703 people, so Knightsville Water Works is well below that figure.
What does “community water system” mean?
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. Indiana has 770 active community water systems, 19% of the state's 3,969 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 83 Indiana systems (2.1%) list purchased groundwater as their primary source.
Who owns and regulates Knightsville Water Works?
EPA lists Knightsville Water Works as owned by a local government. The IN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 6 of the 15 active systems in Clay County (40%) are also owned by a local government.
Does Knightsville Water Works have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2025. The violations listed here began between October 2000 and December 2025. By type: 8 public notice, recordkeeping or other, 2 monitoring and reporting, 1 required treatment not met and 1 reporting. The contaminant or rule involved most often is Consumer Confidence Rule (6 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-12-02 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2016-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2016-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2015-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2014-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2013-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2002-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2000-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
The 12 most recent violations in EPA's records, newest first. Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Knightsville Water Works: frequently asked questions
Who runs Knightsville Water Works?
Knightsville Water Works (PWSID IN5211006) is a community water system owned by a local government. It is regulated by the IN state drinking water program.
How many people does Knightsville Water Works serve?
Knightsville Water Works reports serving 1,523 people through 565 service connections in Clay County, Indiana.
Where does Knightsville Water Works get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Knightsville Water Works have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Knightsville Water Works' water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the IN state drinking water program.
Where can I find Knightsville Water Works' water quality report?
As a community water system, Knightsville Water Works must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Clay County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Brazil City Water Works | Clay | 12,000 | Community | Groundwater |
| Clay City Water Works | Clay | 1,152 | Community | Groundwater |
| Carbon Water Corporation | Clay | 1,088 | Community | Purchased groundwater |
| Center Point Water Works | Clay | 625 | Community | Purchased groundwater |
| Staunton Municipal Water | Clay | 550 | Community | Groundwater |
| Junction One Stop Incorporated | Clay | 320 | Transient non-community | Groundwater |
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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, “Knightsville Water Works, PWSID IN5211006, Indiana”, https://aquacensus.com/water-systems/indiana/knightsville-water-works-in5211006 (data as of October 1, 2026).