Public water system · IA9113071
ActiveCarlisle Water Supply
At a glance
Carlisle Water Supply (PWSID IA9113071) is an active community water system in Warren County, Iowa. It reports serving 4,170 people through 1,850 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,170
Service connections
1,850
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Carlisle Water Supply compare with other water systems in Warren County?
By EPA's size categories, Carlisle Water Supply is a medium system (3,301 to 10,000 people). Warren County has 14 active public water systems, and Carlisle Water Supply is the 4th-largest of them by population served. Its population served is roughly in line with the county average of 4,106 people per system, and accounts for 7.3% of the 57,488 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 Carlisle Water Supply is about 38% 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 Carlisle Water Supply?
EPA lists Carlisle 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. 8 of the 14 active systems in Warren County (57%) are also owned by a local government.
Does Carlisle Water Supply have drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2023. The violations listed here began between April 1993 and July 2023. By type: 8 monitoring and reporting, 1 public notice, recordkeeping or other and 1 monitoring. The contaminant or rule involved most often is Nitrate (3 of them). EPA lists 9 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2023-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2022-07-24 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2022-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2014-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 1993-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
All 10 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.
Carlisle Water Supply: frequently asked questions
Who runs Carlisle Water Supply?
Carlisle Water Supply (PWSID IA9113071) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Carlisle Water Supply serve?
Carlisle Water Supply reports serving 4,170 people through 1,850 service connections in Warren County, Iowa.
Where does Carlisle 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 Carlisle Water Supply have any drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2023. 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 Carlisle 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. EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Carlisle Water Supply's water quality report?
As a community water system, Carlisle 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 Warren County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Warren Water District | Warren + 1 more | 20,095 | Community | Purchased surface water |
| Indianola Water Supply | Warren | 15,833 | Community | Groundwater |
| Norwalk Water Supply | Warren | 14,334 | Community | Purchased surface water |
| Milo Public Water Supply | Warren | 788 | Community | Purchased surface water |
| New Virginia Water Supply | Warren | 498 | Community | Purchased surface water |
| Martensdale Water Supply | Warren | 421 | Community | Purchased surface water |
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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, “Carlisle Water Supply, PWSID IA9113071, Iowa”, https://aquacensus.com/water-systems/iowa/carlisle-water-supply-ia9113071 (data as of October 1, 2026).