Public water system · MI0001540
ActiveColon
At a glance
Colon (PWSID MI0001540) is an active community water system in St. Joseph County, Michigan. It reports serving 1,190 people through 712 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, none is health-based, and the most recent began in April 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,190
Service connections
712
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Colon compare with other water systems in St. Joseph County?
By EPA's size categories, Colon is a small system (501 to 3,300 people). St. Joseph County has 125 active public water systems. Its population served is about 3 times the county average of 391 people per system, and accounts for 2.4% of the 48,813 people reported by systems filed under the county. Across Michigan, the 10,599 active systems average 847 people each. Nationally, the average active community water system reports serving 6,703 people, so Colon 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. Michigan has 1,332 active community water systems, 13% of the state's 10,599 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,214 Michigan systems (96%) list groundwater as their primary source.
Who owns and regulates Colon?
EPA lists Colon as owned by a local government. The MI 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 125 active systems in St. Joseph County (8%) are also owned by a local government.
Does Colon have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2024. The violations listed here began between April 2024 and April 2024. By type: 12 monitoring and reporting. The contaminants or rules involved are Chlorobenzene, 1,2,4-Trichlorobenzene, cis-1,2-Dichloroethylene and 1,1,1-Trichloroethane. 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 |
|---|---|---|---|---|
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | 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.
Colon: frequently asked questions
Who runs Colon?
Colon (PWSID MI0001540) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Colon serve?
Colon reports serving 1,190 people through 712 service connections in St. Joseph County, Michigan.
Where does Colon 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 Colon have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 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 Colon'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, none is health-based, and the most recent began in April 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Colon's water quality report?
As a community water system, Colon 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 St. Joseph County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Sturgis | St. Joseph | 11,920 | Community | Groundwater |
| Three Rivers | St. Joseph | 7,905 | Community | Groundwater |
| Constantine | St. Joseph | 2,075 | Community | Groundwater |
| Lockport Township | St. Joseph | 1,778 | Community | Groundwater |
| White Pigeon | St. Joseph | 1,640 | Community | Groundwater |
| Centreville | St. Joseph | 1,579 | 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, “Colon, PWSID MI0001540, Michigan”, https://aquacensus.com/water-systems/michigan/colon-mi0001540 (data as of October 1, 2026).