Public water system · MI0040200
ActiveMason Mobile, LLC
At a glance
Mason Mobile, LLC (PWSID MI0040200) is an active community water system in Ingham County, Michigan. It reports serving 48 people through 35 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in January 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
48
Service connections
35
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Mason Mobile, LLC compare with other water systems in Ingham County?
By EPA's size categories, Mason Mobile, LLC 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 less than 0.1% 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 Mason Mobile, LLC 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 Mason Mobile, LLC?
EPA lists Mason Mobile, LLC 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 Mason Mobile, LLC have drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in January 2025. The violations listed here began between July 1998 and January 2025. By type: 2 public notice, recordkeeping or other, 2 monitoring and reporting, 1 required treatment not met, 1 reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2025-01-09 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2020-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 7 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.
Mason Mobile, LLC: frequently asked questions
Who runs Mason Mobile, LLC?
Mason Mobile, LLC (PWSID MI0040200) is a community water system privately owned. It is regulated by the MI state drinking water program.
How many people does Mason Mobile, LLC serve?
Mason Mobile, LLC reports serving 48 people through 35 service connections in Ingham County, Michigan.
Where does Mason Mobile, LLC 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 Mason Mobile, LLC have any drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in January 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 Mason Mobile, LLC'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 7 violations for this system; 2 are health-based, and the most recent began in January 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 Mason Mobile, LLC's water quality report?
As a community water system, Mason Mobile, LLC 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 |
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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, “Mason Mobile, LLC, PWSID MI0040200, Michigan”, https://aquacensus.com/water-systems/michigan/mason-mobile-llc-mi0040200 (data as of October 1, 2026).