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Community Water System · PWS ME0002346

Mountainside Mobile Home Park

Thomaston, Maine 04861 - drinking water served from groundwater sources to 130 people, tracked in EPA SDWIS and UCMR5.

130
People served
113
EPA violations
28
Health-based
Untested
UCMR5 result

The verdict

EPA records 113 drinking-water violations at Mountainside Mobile Home Park, 25% of them health-based - above the Maine per-system average.

113
Total EPA violations on record
25%
Health-based (MCL / treatment failure)
130
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mountainside Mobile Home Park

Mountainside Mobile Home Park is a private-owned community water system that delivers drinking water to 130 residents in Thomaston, Maine (Knox County) through 52 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 113 total violations for this system , of which 28 (25%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 64 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 26 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Maine, EPA tracks 1,864 public water systems serving 936,624 people, with 148,796 cumulative violations and 23,741 health-based violations on record. About 94% of systems in the state carry at least one violation, and state-wide the average per system is 79.8 violations. Statewide, 14 of 41 UCMR5-tested systems have reported PFAS detections (34.1%).

Mountainside Mobile Home Park's 113 violations sit above the Maine average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
130
Total Violations
113
Health-Based Violations
28
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
52
County
Knox
School/Daycare
No
MCL Violations
26
Monitoring Violations
64
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 26 2015
Coliform (TCR) MR 25 2012
Nitrate MR 11 2018
Public Notice Other 10 2021
E. COLI MR 8 2019
Gross Alpha, Excl. Radon and U MR 4 2000
Lead and Copper Rule MR 4 2017
Revised Total Coliform Rule MON 4 2018
Consumer Confidence Rule Other 4 2022
Nitrite MR 4 2004
Radium-228 MR 4 2005
Revised Total Coliform Rule TT 2 2021

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Mountainside Mobile Home Park.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID ME0002346 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Maine Drinking Water Authority

Maine's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find ME regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2022 Consumer Confidence Rule Other 4 SDWIS / ME0002346 / 7000
2021 Public Notice Other 10 SDWIS / ME0002346 / 7500
2021 Revised Total Coliform Rule TT 2 SDWIS / ME0002346 / 8000
2019 E. COLI MR 8 SDWIS / ME0002346 / 3014
2018 Nitrate MR 11 SDWIS / ME0002346 / 1040
2018 Revised Total Coliform Rule MON 4 SDWIS / ME0002346 / 8000
2017 Lead and Copper Rule MR 4 SDWIS / ME0002346 / 5000
2015 Coliform (TCR) MCL 26 SDWIS / ME0002346 / 3100
2012 Coliform (TCR) MR 25 SDWIS / ME0002346 / 3100
2005 Radium-228 MR 4 SDWIS / ME0002346 / 4030
2004 Nitrite MR 4 SDWIS / ME0002346 / 1041
2000 Gross Alpha, Excl. Radon and U MR 4 SDWIS / ME0002346 / 4000

How Mountainside Mobile Home Park Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Mountainside Mobile Home Park Maine avg Federal benchmark
Total violations 113 79.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 28 12.7 Indicates a contaminant exceeded a federal MCL
PFAS detection None 34.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 130 502 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,864 regulated public water systems in Maine.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Mountainside Mobile Home Park water safe to drink? ▼
Mountainside Mobile Home Park (PWS ID: ME0002346) has 113 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 130 people using Groundwater sources.
How many people does Mountainside Mobile Home Park serve? ▼
Mountainside Mobile Home Park serves 130 people in Thomaston, Maine. It is a Private-owned system using Groundwater water sources with 52 service connections.
What type of violations does Mountainside Mobile Home Park have? ▼
Mountainside Mobile Home Park has 113 total violations: 28 health-based violations (MCL exceedances or treatment failures), 64 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Mountainside Mobile Home Park water? ▼
No PFAS testing data is available for Mountainside Mobile Home Park under the EPA's UCMR5 monitoring program.
What water source does Mountainside Mobile Home Park use? ▼
Mountainside Mobile Home Park uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.