Public water system · ME0393925

Active

Mdoc State Park-Sebago Lake-Casco

At a glance

Mdoc State Park-Sebago Lake-Casco (PWSID ME0393925) is an active transient non-community water system in Cumberland County, Maine. It reports serving 1,500 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in May 2025.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

1,500

Service connections

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDME0393925

System typeTransient non-community water system

Activity statusActive

Population served1,500

Service connections1

Primary water sourceGroundwater

Owner typeState government

Primacy agencyME state drinking water program

City servedCasco

StateMaine

ZIP—

CountyCumberland County

How does Mdoc State Park-Sebago Lake-Casco compare with other water systems in Cumberland County?

By EPA's size categories, Mdoc State Park-Sebago Lake-Casco is a small system (501 to 3,300 people). Cumberland County has 225 active public water systems. Its population served is about 55% above the county average of 967 people per system, and accounts for 0.7% of the 217,594 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 Mdoc State Park-Sebago Lake-Casco is about 10 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 Mdoc State Park-Sebago Lake-Casco?

EPA lists Mdoc State Park-Sebago Lake-Casco as owned by a state government. 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. 4 of the 225 active systems in Cumberland County (1.8%) are also owned by a state government.

Does Mdoc State Park-Sebago Lake-Casco have drinking water violations?

Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in May 2025. The violations listed here began between August 2012 and May 2025. By type: 5 public notice, recordkeeping or other, 3 monitoring, 3 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Public Notice (5 of them). EPA lists 12 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
2025-05-31	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2024-06-01	Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D	Revised Total Coliform Rulecode 8000	Yes	Resolved
2023-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-05-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2019-05-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2016-06-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2015-08-02	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2015-05-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2015-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Resolved
2012-11-07	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2012-09-09	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2012-08-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved

The 12 most recent 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.

Mdoc State Park-Sebago Lake-Casco: frequently asked questions

Who runs Mdoc State Park-Sebago Lake-Casco?

Mdoc State Park-Sebago Lake-Casco (PWSID ME0393925) is a transient non-community water system owned by a state government. It is regulated by the ME state drinking water program.

How many people does Mdoc State Park-Sebago Lake-Casco serve?

Mdoc State Park-Sebago Lake-Casco reports serving 1,500 people through 1 service connection in Cumberland County, Maine.

Where does Mdoc State Park-Sebago Lake-Casco 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 Mdoc State Park-Sebago Lake-Casco have any drinking water violations?

Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in May 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 Mdoc State Park-Sebago Lake-Casco'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. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in May 2025. For current results, consult EPA ECHO, or the ME state drinking water program.

Where can I find Mdoc State Park-Sebago Lake-Casco's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Mdoc State Park-Sebago Lake-Casco 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 Cumberland County

Water system	County	Population served	Type	Source
Portland Water District-Greater	Cumberland	135,068	Community	Surface water
Brunswick/Topsham Water District	Cumberland	18,863	Community	Groundwater
Yarmouth Water District	Cumberland	8,000	Community	Groundwater
Bridgton Water District	Cumberland	3,660	Community	Groundwater
Maine Water Company Freeport Division	Cumberland	2,700	Community	Groundwater
Gray Water District	Cumberland	2,468	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, “Mdoc State Park-Sebago Lake-Casco, PWSID ME0393925, Maine”, https://aquacensus.com/water-systems/maine/mdoc-state-park-sebago-lake-casco-me0393925 (data as of October 1, 2026).