Public water system · MI2015705
ActiveGrass River Natural Area
At a glance
Grass River Natural Area (PWSID MI2015705) is an active transient non-community water system in Antrim County, Michigan. It reports serving 200 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
200
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Grass River Natural Area compare with other water systems in Antrim County?
By EPA's size categories, Grass River Natural Area is a very small system (500 people or fewer). Antrim County has 111 active public water systems. Its population served is roughly in line with the county average of 204 people per system, and accounts for 0.9% of the 22,623 people reported by systems filed under the county. Across Michigan, the 10,599 active systems average 847 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Grass River Natural Area is about 39% above that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Michigan has 7,865 active transient non-community water systems, 74% 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 Grass River Natural Area?
EPA lists Grass River Natural Area 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. 103 of the 111 active systems in Antrim County (93%) are also privately owned.
Does Grass River Natural Area have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2016. By type: 1 monitoring. The contaminant or rule involved is Revised Total Coliform Rule. EPA lists 1 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 |
|---|---|---|---|---|
| 2016-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
The one violation in EPA's records.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.
Grass River Natural Area: frequently asked questions
Who runs Grass River Natural Area?
Grass River Natural Area (PWSID MI2015705) is a transient non-community water system privately owned. It is regulated by the MI state drinking water program.
How many people does Grass River Natural Area serve?
Grass River Natural Area reports serving 200 people through 1 service connection in Antrim County, Michigan.
Where does Grass River Natural Area 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 Grass River Natural Area have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2016. 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 Grass River Natural Area'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 one violation for this system; it is not health-based, and the most recent began in October 2016. For current results, consult EPA ECHO, or the MI state drinking water program.
Where can I find Grass River Natural Area's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Grass River Natural Area is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Antrim County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mancelona Area Water and Sewer Authority | Antrim | 3,900 | Community | Groundwater |
| Elk Rapids, Village of | Antrim | 1,642 | Community | Groundwater |
| Clam River Dockside Inc. | Antrim | 1,500 | Transient non-community | Groundwater |
| Shanty Creek - Watars Association | Antrim | 1,250 | Community | Groundwater |
| Bellaire, Village of | Antrim | 1,086 | Community | Groundwater |
| Central Lake, Village of | Antrim | 952 | 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, “Grass River Natural Area, PWSID MI2015705, Michigan”, https://aquacensus.com/water-systems/michigan/grass-river-natural-area-mi2015705 (data as of October 1, 2026).