Public water system · IA5815064
ActiveColumbus Junction Water Supply
At a glance
Columbus Junction Water Supply (PWSID IA5815064) is an active community water system in Louisa County, Iowa. It reports serving 1,830 people through 811 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,830
Service connections
811
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Columbus Junction Water Supply compare with other water systems in Louisa County?
By EPA's size categories, Columbus Junction Water Supply is a small system (501 to 3,300 people). Louisa County has 22 active public water systems, and Columbus Junction Water Supply is the 2nd-largest of them by population served. Its population served is about 4.1 times the county average of 442 people per system, and accounts for 19% of the 9,731 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 Columbus Junction 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 Columbus Junction Water Supply?
EPA lists Columbus Junction 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 22 active systems in Louisa County (36%) are also owned by a local government.
Does Columbus Junction Water Supply have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2021. The violations listed here began between October 1990 and October 2021. By type: 6 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2021-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 1997-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1990-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 6 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.
Columbus Junction Water Supply: frequently asked questions
Who runs Columbus Junction Water Supply?
Columbus Junction Water Supply (PWSID IA5815064) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Columbus Junction Water Supply serve?
Columbus Junction Water Supply reports serving 1,830 people through 811 service connections in Louisa County, Iowa.
Where does Columbus Junction 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 Columbus Junction Water Supply have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2021. 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 Columbus Junction 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 6 violations for this system; none is health-based, and the most recent began in October 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Columbus Junction Water Supply's water quality report?
As a community water system, Columbus Junction 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 Louisa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Wapello Municipal Water Works | Louisa | 2,096 | Community | Groundwater |
| Tyson Fresh Meats Inc. (Columbus Jct) | Louisa | 1,300 | Non-transient non-community | Groundwater |
| Louisa-Muscatine Community School | Louisa | 1,190 | Non-transient non-community | Groundwater |
| Morning Sun Water Department | Louisa | 752 | Community | Groundwater |
| Caseys #3449 | Louisa | 715 | Transient non-community | Groundwater |
| Grandview Muni Water Dept | Louisa | 437 | 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, “Columbus Junction Water Supply, PWSID IA5815064, Iowa”, https://aquacensus.com/water-systems/iowa/columbus-junction-water-supply-ia5815064 (data as of October 1, 2026).