Public water system · MI0040194
ActiveHamlin Mobile Home Park
At a glance
Hamlin Mobile Home Park (PWSID MI0040194) is an active community water system in Ingham County, Michigan. It reports serving 458 people through 239 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
458
Service connections
239
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Hamlin Mobile Home Park compare with other water systems in Ingham County?
By EPA's size categories, Hamlin Mobile Home Park is a very small system (500 people or fewer). Ingham County has 108 active public water systems. Its population served is well below the county average of 2,577 people per system, and accounts for 0.2% of the 278,352 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 Hamlin Mobile Home Park 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 Hamlin Mobile Home Park?
EPA lists Hamlin Mobile Home Park as privately owned. 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. 94 of the 108 active systems in Ingham County (87%) are also privately owned.
Does Hamlin Mobile Home Park have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in December 2025. The violations listed here began between July 2001 and December 2025. By type: 2 monitoring and reporting, 2 public notice, recordkeeping or other, 1 monitoring 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 |
|---|---|---|---|---|
| 2025-12-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2025-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2021-04-01 | Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2021-04-01 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2001-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | 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.
Hamlin Mobile Home Park: frequently asked questions
Who runs Hamlin Mobile Home Park?
Hamlin Mobile Home Park (PWSID MI0040194) is a community water system privately owned. It is regulated by the MI state drinking water program.
How many people does Hamlin Mobile Home Park serve?
Hamlin Mobile Home Park reports serving 458 people through 239 service connections in Ingham County, Michigan.
Where does Hamlin Mobile Home Park 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 Hamlin Mobile Home Park have any drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in December 2025. 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 Hamlin Mobile Home Park'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 December 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Hamlin Mobile Home Park's water quality report?
As a community water system, Hamlin Mobile Home Park 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 Ingham County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lansing Board of Water & Light | Ingham | 166,000 | Community | Groundwater |
| East Lansing, City of | Ingham | 33,000 | Community | Purchased groundwater |
| Meridian Township | Ingham | 25,600 | Community | Purchased groundwater |
| Michigan State University | Ingham | 12,793 | Community | Groundwater |
| Mason, City of | Ingham | 8,252 | Community | Groundwater |
| Lansing Township | Ingham | 5,500 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Hamlin Mobile Home Park, PWSID MI0040194, Michigan”, https://aquacensus.com/water-systems/michigan/hamlin-mobile-home-park-mi0040194 (data as of October 1, 2026).