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WEST RIVER MONTESSORI SCHOOL

PWS ID: VT0020387 · SOUTH LONDONDERRY, Vermont 05155

WEST RIVER MONTESSORI SCHOOL serves 41 people in SOUTH LONDONDERRY, Vermont using Groundwater water sources. It has 513 recorded EPA violations, including 16 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: WEST RIVER MONTESSORI SCHOOL

WEST RIVER MONTESSORI SCHOOL is a private-owned non-transient non-community water system that delivers drinking water to 41 residents in SOUTH LONDONDERRY, Vermont (Windham County) through 2 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 513 total violations for this system , of which 16 (3%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 486 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 43 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Vermont, EPA tracks 1,357 public water systems serving 646,999 people, with 153,729 cumulative violations and 16,917 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 113.3 violations. WEST RIVER MONTESSORI SCHOOL's 513 violations sit above the Vermont average. Statewide, 3 of 37 UCMR5-tested systems have reported PFAS detections (8.1%). 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
41
Total Violations
513
Health-Based Violations
16
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
2
County
Windham
School/Daycare
Yes
MCL Violations
5
Monitoring Violations
486
Treatment Tech Violations
11

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 43 2010
Lead and Copper Rule TT 11 2007
Nitrate MR 10 2009
Methoxychlor MR 9 2009
OXAMYL MR 9 2009
Simazine MR 9 2009
Picloram MR 9 2009
Dinoseb MR 9 2009
Hexachlorocyclopentadiene MR 9 2009
Carbofuran MR 9 2009
Atrazine MR 9 2009
LASSO MR 9 2009
Heptachlor MR 9 2009
2,4-D MR 9 2009
HEXACHLOROBENZENE MR 9 2009
Benzo(a)pyrene MR 9 2009
Pentachlorophenol MR 9 2009
Total Polychlorinated Biphenyls (PCB) MR 9 2009
ETHYLENE DIBROMIDE MR 9 2009
Chlordane MR 9 2009
BHC-GAMMA MR 9 2009
Di(2-ethylhexyl) phthalate MR 9 2009
Toxaphene MR 9 2009
2,4,5-TP MR 9 2009
Di(2-ethylhexyl) adipate MR 9 2009
Endrin MR 9 2009
Heptachlor epoxide MR 9 2009
DICHLOROMETHANE MR 8 2000
o-Dichlorobenzene MR 8 2000
Vinyl chloride MR 8 2000

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 WEST RIVER MONTESSORI SCHOOL.

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 VT0020387 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Vermont Drinking Water Authority

Vermont'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 VT 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
2025 CYANIDE MR 5 SDWIS / VT0020387 / 1024
2021 E. COLI MR 4 SDWIS / VT0020387 / 3014
2010 Coliform (TCR) MR 43 SDWIS / VT0020387 / 3100
2009 Nitrate MR 10 SDWIS / VT0020387 / 1040
2009 Methoxychlor MR 9 SDWIS / VT0020387 / 2015
2009 OXAMYL MR 9 SDWIS / VT0020387 / 2036
2009 Simazine MR 9 SDWIS / VT0020387 / 2037
2009 Picloram MR 9 SDWIS / VT0020387 / 2040
2009 Dinoseb MR 9 SDWIS / VT0020387 / 2041
2009 Hexachlorocyclopentadiene MR 9 SDWIS / VT0020387 / 2042
2009 Carbofuran MR 9 SDWIS / VT0020387 / 2046
2009 Atrazine MR 9 SDWIS / VT0020387 / 2050
2009 LASSO MR 9 SDWIS / VT0020387 / 2051
2009 Heptachlor MR 9 SDWIS / VT0020387 / 2065
2009 2,4-D MR 9 SDWIS / VT0020387 / 2105

How WEST RIVER MONTESSORI SCHOOL Compares

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

Metric WEST RIVER MONTESSORI SCHOOL Vermont avg Federal benchmark
Total violations 513 113.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 16 12.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 8.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 41 477 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,357 regulated public water systems in Vermont.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is WEST RIVER MONTESSORI SCHOOL water safe to drink? ▼
WEST RIVER MONTESSORI SCHOOL (PWS ID: VT0020387) has 513 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 41 people using Groundwater sources.
How many people does WEST RIVER MONTESSORI SCHOOL serve? ▼
WEST RIVER MONTESSORI SCHOOL serves 41 people in SOUTH LONDONDERRY, Vermont. It is a Private-owned system using Groundwater water sources with 2 service connections.
What type of violations does WEST RIVER MONTESSORI SCHOOL have? ▼
WEST RIVER MONTESSORI SCHOOL has 513 total violations: 16 health-based violations (MCL exceedances or treatment failures), 486 monitoring/reporting violations, and 11 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in WEST RIVER MONTESSORI SCHOOL water? ▼
No PFAS testing data is available for WEST RIVER MONTESSORI SCHOOL under the EPA's UCMR5 monitoring program.
What water source does WEST RIVER MONTESSORI SCHOOL use? ▼
WEST RIVER MONTESSORI SCHOOL uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.

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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.

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