Public water system · MI0000120
ActiveAllegan
At a glance
Allegan (PWSID MI0000120) is an active community water system in Allegan County, Michigan. It reports serving 5,930 people through 1,983 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; 1 is health-based, and the most recent began in July 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
5,930
Service connections
1,983
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Allegan compare with other water systems in Allegan County?
By EPA's size categories, Allegan is a medium system (3,301 to 10,000 people). Allegan County has 302 active public water systems, and Allegan is the largest of them by population served. Its population served is about 17 times the county average of 345 people per system, and accounts for 5.7% of the 104,093 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 Allegan is about 12% 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 Allegan?
EPA lists Allegan 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. 13 of the 302 active systems in Allegan County (4.3%) are also owned by a local government.
Does Allegan have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in July 2023. The violations listed here began between December 2004 and July 2023. By type: 3 monitoring and reporting, 2 public notice, recordkeeping or other and 1 required treatment not met. The contaminant or rule involved most often is Consumer Confidence Rule (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 |
|---|---|---|---|---|
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2021-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2021-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2021-07-01 | Required treatment not metWQP Entry Point/Tap Treatment Technique Non-Compliance · code 59 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2021-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | 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.
Allegan: frequently asked questions
Who runs Allegan?
Allegan (PWSID MI0000120) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Allegan serve?
Allegan reports serving 5,930 people through 1,983 service connections in Allegan County, Michigan.
Where does Allegan 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 Allegan have any drinking water violations?
EPA's records list 6 violations for this system; 1 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 Allegan'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; 1 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 MI state drinking water program.
Where can I find Allegan's water quality report?
As a community water system, Allegan 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 Allegan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kalamazoo Lake Sewer & Water Authority | Allegan | 5,000 | Community | Groundwater |
| Wayland | Allegan | 4,435 | Community | Groundwater |
| Otsego | Allegan | 4,120 | Community | Groundwater |
| Plainwell | Allegan | 3,998 | Community | Groundwater |
| Bittersweet Ski Resort Inc. | Allegan | 3,500 | Transient non-community | Groundwater |
| Sandy Pines Wilderness Trls #1 | Allegan | 2,500 | Non-transient non-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, “Allegan, PWSID MI0000120, Michigan”, https://aquacensus.com/water-systems/michigan/allegan-mi0000120 (data as of October 1, 2026).