Public water system · ME0090840
ActiveLimestone Water & Sewer District
At a glance
Limestone Water & Sewer District (PWSID ME0090840) is an active community water system in Aroostook County, Maine. It reports serving 875 people through 350 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in March 2024.
This page covers its drinking water system only; sewer and wastewater service are not part of EPA's drinking water records.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
875
Service connections
350
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Limestone Water & Sewer District compare with other water systems in Aroostook County?
By EPA's size categories, Limestone Water & Sewer District is a small system (501 to 3,300 people). Aroostook County has 123 active public water systems. Its population served is about 166% above the county average of 329 people per system, and accounts for 2.2% of the 40,518 people reported by systems filed under the county. Across Maine, the 1,862 active systems average 503 people each. Nationally, the average active community water system reports serving 6,703 people, so Limestone Water & Sewer District 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. Maine has 386 active community water systems, 21% 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 Limestone Water & Sewer District?
EPA lists Limestone Water & Sewer District as owned by a local 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. 21 of the 123 active systems in Aroostook County (17%) are also owned by a local government.
Does Limestone Water & Sewer District have drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in March 2024. The violations listed here began between September 1998 and March 2024. By type: 8 required treatment not met, 3 public notice, recordkeeping or other and 1 monitoring and reporting. The contaminant or rule involved most often is Surface Water Treatment Rule (8 of them). EPA lists 10 as resolved and 2 as archived. 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 |
|---|---|---|---|---|
| 2024-03-07 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2022-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2022-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1999-06-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1999-05-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1999-03-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1999-02-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1999-01-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1998-12-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1998-10-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Archived |
| 1998-09-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Archived |
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.
Limestone Water & Sewer District: frequently asked questions
Who runs Limestone Water & Sewer District?
Limestone Water & Sewer District (PWSID ME0090840) is a community water system owned by a local government. It is regulated by the ME state drinking water program.
How many people does Limestone Water & Sewer District serve?
Limestone Water & Sewer District reports serving 875 people through 350 service connections in Aroostook County, Maine.
Where does Limestone Water & Sewer District 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 Limestone Water & Sewer District have any drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in March 2024. 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 Limestone Water & Sewer District'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, 8 are health-based, and the most recent began in March 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the ME state drinking water program.
Where can I find Limestone Water & Sewer District's water quality report?
As a community water system, Limestone Water & Sewer District 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 Aroostook County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Presque Isle Utilities District | Aroostook | 6,128 | Community | Groundwater under influence of surface water |
| Houlton Water Company | Aroostook | 4,735 | Community | Groundwater |
| Caribou Utilities District | Aroostook | 3,943 | Community | Groundwater |
| Madawaska Water District | Aroostook | 2,738 | Community | Groundwater |
| Van Buren Water District | Aroostook | 2,190 | Community | Groundwater |
| Fort Fairfield Utilities District | Aroostook | 2,025 | Community | Surface water |
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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, “Limestone Water & Sewer District, PWSID ME0090840, Maine”, https://aquacensus.com/water-systems/maine/limestone-water-sewer-district-me0090840 (data as of October 1, 2026).