Public water system · IA4213103
ActiveIowa Limestone Co
At a glance
Iowa Limestone Co (PWSID IA4213103) is an active non-transient non-community water system in Hardin County, Iowa. It reports serving 48 people through 3 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in November 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
48
Service connections
3
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Iowa Limestone Co compare with other water systems in Hardin County?
By EPA's size categories, Iowa Limestone Co is a very small system (500 people or fewer). Hardin County has 22 active public water systems. Its population served is well below the county average of 633 people per system, and accounts for 0.3% of the 13,920 people reported by systems filed under the county. Across Iowa, the 1,828 active systems average 1,718 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Iowa Limestone Co is well below that figure.
What does “non-transient non-community water system” mean?
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. Iowa has 118 active non-transient non-community water systems, 6.5% 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 Iowa Limestone Co?
EPA lists Iowa Limestone Co as privately owned. 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. 10 of the 22 active systems in Hardin County (45%) are also privately owned.
Does Iowa Limestone Co have drinking water violations?
EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in November 2025. The violations listed here began between July 2000 and November 2025. By type: 2 monitoring and reporting, 2 contaminant level above the legal limit and 1 monitoring. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2025-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2001-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2001-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2001-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 5 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.
Iowa Limestone Co: frequently asked questions
Who runs Iowa Limestone Co?
Iowa Limestone Co (PWSID IA4213103) is a non-transient non-community water system privately owned. It is regulated by the IA state drinking water program.
How many people does Iowa Limestone Co serve?
Iowa Limestone Co reports serving 48 people through 3 service connections in Hardin County, Iowa.
Where does Iowa Limestone Co 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 Iowa Limestone Co have any drinking water violations?
EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in November 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 Iowa Limestone Co'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. EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in November 2025. For current results, consult EPA ECHO, or the IA state drinking water program.
Where can I find Iowa Limestone Co's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Iowa Limestone Co is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Hardin County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Iowa Falls Water Department | Hardin | 5,146 | Community | Groundwater |
| Eldora Water Supply | Hardin | 2,664 | Community | Groundwater |
| Ackley Municipal Water Works | Hardin | 1,599 | Community | Groundwater |
| Hubbard Water Supply | Hardin | 860 | Community | Groundwater |
| Alden Water Supply | Hardin | 763 | Community | Groundwater |
| Radcliffe Municipal Water | Hardin | 561 | 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, “Iowa Limestone Co, PWSID IA4213103, Iowa”, https://aquacensus.com/water-systems/iowa/iowa-limestone-co-ia4213103 (data as of October 1, 2026).