Public water system · ME0002807

Active

Yellowstone Park

At a glance

Yellowstone Park (PWSID ME0002807) is an active transient non-community water system in York County, Maine. It reports serving 328 people through 1 service connection. 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 September 2025.

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

Population served

328

Service connections

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDME0002807

System typeTransient non-community water system

Activity statusActive

Population served328

Service connections1

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyME state drinking water program

City servedSanford

StateMaine

ZIP—

CountyYork County

How does Yellowstone Park compare with other water systems in York County?

By EPA's size categories, Yellowstone Park is a very small system (500 people or fewer). York County has 188 active public water systems. Its population served is about 63% below the county average of 877 people per system, and accounts for 0.2% of the 164,945 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 Yellowstone Park is about 128% 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. 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 Yellowstone Park?

EPA lists Yellowstone Park 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. 161 of the 188 active systems in York County (86%) are also privately owned.

Does Yellowstone Park have drinking water violations?

EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in September 2025. The violations listed here began between January 1999 and September 2025. By type: 3 public notice, recordkeeping or other, 2 required treatment not met, 1 monitoring and 1 monitoring and reporting. The contaminant or rule involved most often is Public Notice (3 of them). EPA lists 4 as unaddressed, 2 as resolved and 1 as archived. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.

Began	Violation	Contaminant or rule	Health-based	Status
2025-09-28	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2025-06-01	Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D	Revised Total Coliform Rulecode 8000	Yes	Unaddressed
2025-05-31	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2024-06-01	Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D	Revised Total Coliform Rulecode 8000	Yes	Unaddressed
2022-05-31	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2021-09-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
1999-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Archived

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.

Yellowstone Park: frequently asked questions

Who runs Yellowstone Park?

Yellowstone Park (PWSID ME0002807) is a transient non-community water system privately owned. It is regulated by the ME state drinking water program.

How many people does Yellowstone Park serve?

Yellowstone Park reports serving 328 people through 1 service connection in York County, Maine.

Where does Yellowstone 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 Yellowstone Park have any drinking water violations?

EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in September 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 Yellowstone 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 7 violations for this system; 2 are health-based, and the most recent began in September 2025. For current results, consult EPA ECHO, or the ME state drinking water program.

Where can I find Yellowstone Park's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Yellowstone Park 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 York County

Water system	County	Population served	Type	Source
Maine Water Company Biddeford Saco Div	York	42,508	Community	Surface water
Kennebunk, Kennebunkport & Wells Wd	York	35,663	Community	Surface water
Kittery Water District	York	14,478	Community	Surface water
Sanford Water District	York	14,328	Community	Groundwater
York Water District	York	13,675	Community	Surface water
South Berwick Water District	York	3,722	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, “Yellowstone Park, PWSID ME0002807, Maine”, https://aquacensus.com/water-systems/maine/yellowstone-park-me0002807 (data as of October 1, 2026).