Public water system · IA5547094
ActiveLone Rock Water Supply
At a glance
Lone Rock Water Supply (PWSID IA5547094) is an active community water system in Kossuth County, Iowa. It reports serving 146 people through 94 service connections. Its primary water source is 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 March 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
146
Service connections
94
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lone Rock Water Supply compare with other water systems in Kossuth County?
By EPA's size categories, Lone Rock Water Supply is a very small system (500 people or fewer). Kossuth County has 27 active public water systems. Its population served is about 64% below the county average of 403 people per system, and accounts for 1.3% of the 10,881 people reported by systems filed under the county. Across Iowa, the 1,828 active systems average 1,718 people each. Nationally, the average active community water system reports serving 6,703 people, so Lone Rock Water Supply 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. Iowa has 1,084 active community water systems, 59% of the state's 1,828 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,502 Iowa systems (82%) list groundwater as their primary source.
Who owns and regulates Lone Rock Water Supply?
EPA lists Lone Rock Water Supply as owned by a local government. The IA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 13 of the 27 active systems in Kossuth County (48%) are also owned by a local government.
Does Lone Rock Water Supply have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in March 2024. The violations listed here began between April 1995 and March 2024. By type: 8 monitoring and reporting, 3 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (3 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 |
|---|---|---|---|---|
| 2024-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2005-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Di(2-ethylhexyl) adipatecode 2035 | No | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Pentachlorophenolcode 2326 | No | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dalaponcode 2031 | No | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | 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.
Lone Rock Water Supply: frequently asked questions
Who runs Lone Rock Water Supply?
Lone Rock Water Supply (PWSID IA5547094) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Lone Rock Water Supply serve?
Lone Rock Water Supply reports serving 146 people through 94 service connections in Kossuth County, Iowa.
Where does Lone Rock Water Supply get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Lone Rock Water Supply 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 March 2024. 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 Lone Rock Water Supply's 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 March 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Lone Rock Water Supply's water quality report?
As a community water system, Lone Rock Water Supply 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 Kossuth County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Algona Municipal Utilities | Kossuth | 5,487 | Community | Groundwater |
| Bancroft Water Supply | Kossuth | 711 | Community | Groundwater |
| Swea City Water Supply | Kossuth | 584 | Community | Groundwater |
| Whittemore Muni Water Supply | Kossuth | 522 | Community | Groundwater |
| Titonka Water Supply | Kossuth | 511 | Community | Groundwater |
| Burt Water Supply | Kossuth | 418 | 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, “Lone Rock Water Supply, PWSID IA5547094, Iowa”, https://aquacensus.com/water-systems/iowa/lone-rock-water-supply-ia5547094 (data as of October 1, 2026).