Public water system · ME0092000
ActiveSunday River-Upper Cistern System
At a glance
Sunday River-Upper Cistern System (PWSID ME0092000) is an active transient non-community water system in Oxford County, Maine. It reports serving 750 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
750
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Sunday River-Upper Cistern System compare with other water systems in Oxford County?
By EPA's size categories, Sunday River-Upper Cistern System is a small system (501 to 3,300 people). Oxford County has 133 active public water systems. Its population served is about 145% above the county average of 306 people per system, and accounts for 1.8% of the 40,635 people reported by systems filed under the county. Across Maine, the 1,862 active systems average 503 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Sunday River-Upper Cistern System is about 5.2 times 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. Maine has 1,091 active transient non-community water systems, 59% of the state's 1,862 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,780 Maine systems (96%) list groundwater as their primary source.
Who owns and regulates Sunday River-Upper Cistern System?
EPA lists Sunday River-Upper Cistern System as privately owned. The ME state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 113 of the 133 active systems in Oxford County (85%) are also privately owned.
Does Sunday River-Upper Cistern System have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2023. The violations listed here began between January 1995 and October 2023. By type: 3 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2023-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2005-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 4 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.
Sunday River-Upper Cistern System: frequently asked questions
Who runs Sunday River-Upper Cistern System?
Sunday River-Upper Cistern System (PWSID ME0092000) is a transient non-community water system privately owned. It is regulated by the ME state drinking water program.
How many people does Sunday River-Upper Cistern System serve?
Sunday River-Upper Cistern System reports serving 750 people through 1 service connection in Oxford County, Maine.
Where does Sunday River-Upper Cistern System 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 Sunday River-Upper Cistern System have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 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 Sunday River-Upper Cistern System'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 4 violations for this system; none is health-based, and the most recent began in October 2023. For current results, consult EPA ECHO, or the ME state drinking water program.
Where can I find Sunday River-Upper Cistern System's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Sunday River-Upper Cistern System 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 Oxford County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Rumford Water District | Oxford | 4,050 | Community | Groundwater |
| Paris Utility District | Oxford | 2,940 | Community | Groundwater |
| Mexico Water District | Oxford | 2,425 | Community | Groundwater |
| Fryeburg Water Company | Oxford | 2,085 | Community | Groundwater |
| Norway Water District | Oxford | 2,000 | Community | Groundwater |
| Bethel Water District | Oxford | 1,813 | 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, “Sunday River-Upper Cistern System, PWSID ME0092000, Maine”, https://aquacensus.com/water-systems/maine/sunday-river-upper-cistern-system-me0092000 (data as of October 1, 2026).