Public water system · IA1376098
ActiveRockwell City Water Supply
At a glance
Rockwell City Water Supply (PWSID IA1376098) is an active community water system in Calhoun County, Iowa. It reports serving 2,250 people through 878 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,250
Service connections
878
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Rockwell City Water Supply compare with other water systems in Calhoun County?
By EPA's size categories, Rockwell City Water Supply is a small system (501 to 3,300 people). Calhoun County has 14 active public water systems, and Rockwell City Water Supply is the largest of them by population served. Its population served is about 3.9 times the county average of 572 people per system, and accounts for 28% of the 8,014 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 Rockwell City Water Supply is about 66% 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 Rockwell City Water Supply?
EPA lists Rockwell City 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. 12 of the 14 active systems in Calhoun County (86%) are also owned by a local government.
Does Rockwell City Water Supply have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 2024. The violations listed here began between March 1991 and July 2024. By type: 4 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 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 |
|---|---|---|---|---|
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2014-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 1991-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | 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.
Rockwell City Water Supply: frequently asked questions
Who runs Rockwell City Water Supply?
Rockwell City Water Supply (PWSID IA1376098) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Rockwell City Water Supply serve?
Rockwell City Water Supply reports serving 2,250 people through 878 service connections in Calhoun County, Iowa.
Where does Rockwell City 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 Rockwell City Water Supply have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 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 Rockwell City 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 5 violations for this system; none is health-based, and the most recent began in July 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 Rockwell City Water Supply's water quality report?
As a community water system, Rockwell City 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 Calhoun County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lake City Water Supply | Calhoun | 1,731 | Community | Groundwater |
| Manson Water Supply | Calhoun | 1,709 | Community | Groundwater |
| Pomeroy Water Supply | Calhoun | 671 | Community | Groundwater |
| Lohrville Water Supply | Calhoun | 381 | Community | Groundwater |
| Farnhamville Water Supply | Calhoun | 379 | Community | Groundwater |
| Twin Lakes Utilities | Calhoun | 300 | Community | Purchased 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, “Rockwell City Water Supply, PWSID IA1376098, Iowa”, https://aquacensus.com/water-systems/iowa/rockwell-city-water-supply-ia1376098 (data as of October 1, 2026).