PlainWater
States → Oregon

EXCALIBUR VILLAGE

PWS ID: OR4100599 · LAKE OSWEGO, Oregon 97035

EXCALIBUR VILLAGE serves 180 people in LAKE OSWEGO, Oregon using Groundwater water sources. It has 135 recorded EPA violations, including 6 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: EXCALIBUR VILLAGE

EXCALIBUR VILLAGE is a private-owned community water system that delivers drinking water to 180 residents in LAKE OSWEGO, Oregon (Clackamas County) through 85 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 135 total violations for this system , of which 6 (4%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 120 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 7 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 Oregon, EPA tracks 2,518 public water systems serving 4,005,242 people, with 206,659 cumulative violations and 20,339 health-based violations on record. About 99% of systems in the state carry at least one violation, and state-wide the average per system is 82.1 violations. EXCALIBUR VILLAGE's 135 violations sit above the Oregon average. Statewide, 30 of 125 UCMR5-tested systems have reported PFAS detections (24%). 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
180
Total Violations
135
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
85
County
Clackamas
School/Daycare
No
MCL Violations
6
Monitoring Violations
120
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 7 2007
Coliform (TCR) MCL 6 2016
Lead and Copper Rule MR 5 2017
Nitrate MR 5 2012
Chlordane MR 2 2017
ETHYLENE DIBROMIDE MR 2 2017
Total Polychlorinated Biphenyls (PCB) MR 2 2017
Pentachlorophenol MR 2 2017
Benzo(a)pyrene MR 2 2017
HEXACHLOROBENZENE MR 2 2017
2,4-D MR 2 2017
Heptachlor epoxide MR 2 2017
LASSO MR 2 2017
Atrazine MR 2 2017
Hexachlorocyclopentadiene MR 2 2017
Dinoseb MR 2 2017
Di(2-ethylhexyl) adipate MR 2 2017
Glyphosate MR 2 2017
Endothall MR 2 2017
Dalapon MR 2 2017
BHC-GAMMA MR 2 2017
Endrin MR 2 2017
cis-1,2-Dichloroethylene MR 2 2017
Xylenes, Total MR 2 2017
DICHLOROMETHANE MR 2 2017
Vinyl chloride MR 2 2017
1,1-Dichloroethylene MR 2 2017
trans-1,2-Dichloroethylene MR 2 2017
1,2-Dichloroethane MR 2 2017
1,1,1-Trichloroethane MR 2 2017

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 EXCALIBUR VILLAGE.

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 OR4100599 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Oregon Drinking Water Authority

Oregon'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 OR 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 Consumer Confidence Rule Other 2 SDWIS / OR4100599 / 7000
2022 Revised Total Coliform Rule MON 1 SDWIS / OR4100599 / 8000
2017 Lead and Copper Rule MR 5 SDWIS / OR4100599 / 5000
2017 Chlordane MR 2 SDWIS / OR4100599 / 2959
2017 ETHYLENE DIBROMIDE MR 2 SDWIS / OR4100599 / 2946
2017 Total Polychlorinated Biphenyls (PCB) MR 2 SDWIS / OR4100599 / 2383
2017 Pentachlorophenol MR 2 SDWIS / OR4100599 / 2326
2017 Benzo(a)pyrene MR 2 SDWIS / OR4100599 / 2306
2017 HEXACHLOROBENZENE MR 2 SDWIS / OR4100599 / 2274
2017 2,4-D MR 2 SDWIS / OR4100599 / 2105
2017 Heptachlor epoxide MR 2 SDWIS / OR4100599 / 2067
2017 LASSO MR 2 SDWIS / OR4100599 / 2051
2017 Atrazine MR 2 SDWIS / OR4100599 / 2050
2017 Hexachlorocyclopentadiene MR 2 SDWIS / OR4100599 / 2042
2017 Dinoseb MR 2 SDWIS / OR4100599 / 2041

How EXCALIBUR VILLAGE Compares

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

Metric EXCALIBUR VILLAGE Oregon avg Federal benchmark
Total violations 135 82.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 6 8.1 Indicates a contaminant exceeded a federal MCL
PFAS detection None 24% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 180 1,591 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,518 regulated public water systems in Oregon.

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 EXCALIBUR VILLAGE water safe to drink? ▼
EXCALIBUR VILLAGE (PWS ID: OR4100599) has 135 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 180 people using Groundwater sources.
How many people does EXCALIBUR VILLAGE serve? ▼
EXCALIBUR VILLAGE serves 180 people in LAKE OSWEGO, Oregon. It is a Private-owned system using Groundwater water sources with 85 service connections.
What type of violations does EXCALIBUR VILLAGE have? ▼
EXCALIBUR VILLAGE has 135 total violations: 6 health-based violations (MCL exceedances or treatment failures), 120 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in EXCALIBUR VILLAGE water? ▼
No PFAS testing data is available for EXCALIBUR VILLAGE under the EPA's UCMR5 monitoring program.
What water source does EXCALIBUR VILLAGE use? ▼
EXCALIBUR VILLAGE 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.

Explore PlainWater

Water in Oregon

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for Oregon

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
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.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial