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THE MARYLHURST SCHOOL

PWS ID: OR4105094 · OREGON CITY, Oregon 97045

THE MARYLHURST SCHOOL serves 140 people in OREGON CITY, Oregon using Groundwater water sources. It has 157 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: THE MARYLHURST SCHOOL

THE MARYLHURST SCHOOL is a private-owned non-transient non-community water system that delivers drinking water to 140 residents in OREGON CITY, Oregon (Clackamas County) through 6 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 157 total violations for this system , of which 0 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 156 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 12 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. THE MARYLHURST SCHOOL's 157 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
140
Total Violations
157
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
6
County
Clackamas
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
156
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 12 2013
Nitrate MR 10 2019
Lead and Copper Rule MR 9 2005
Revised Total Coliform Rule MON 4 2021
Nickel MR 3 2005
Carbon tetrachloride MR 2 2005
DICHLOROMETHANE MR 2 2005
Ethylbenzene MR 2 2005
CHLOROBENZENE MR 2 2005
p-Dichlorobenzene MR 2 2005
Styrene MR 2 2005
trans-1,2-Dichloroethylene MR 2 2005
2,4-D MR 2 2005
2,4,5-TP MR 2 2005
Atrazine MR 2 2005
Benzo(a)pyrene MR 2 2005
BHC-GAMMA MR 2 2005
Carbofuran MR 2 2005
Chlordane MR 2 2005
Diquat MR 2 2005
Endothall MR 2 2005
ETHYLENE DIBROMIDE MR 2 2005
Heptachlor MR 2 2005
HEXACHLOROBENZENE MR 2 2005
Hexachlorocyclopentadiene MR 2 2005
Di(2-ethylhexyl) phthalate MR 2 2005
Picloram MR 2 2005
Total Polychlorinated Biphenyls (PCB) MR 2 2005
Toxaphene MR 2 2005
OXAMYL MR 2 2005

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 THE MARYLHURST 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 OR4105094 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
2021 Revised Total Coliform Rule MON 4 SDWIS / OR4105094 / 8000
2019 Nitrate MR 10 SDWIS / OR4105094 / 1040
2016 E. COLI MR 1 SDWIS / OR4105094 / 3014
2013 Coliform (TCR) MR 12 SDWIS / OR4105094 / 3100
2005 Lead and Copper Rule MR 9 SDWIS / OR4105094 / 5000
2005 Nickel MR 3 SDWIS / OR4105094 / 1036
2005 Carbon tetrachloride MR 2 SDWIS / OR4105094 / 2982
2005 DICHLOROMETHANE MR 2 SDWIS / OR4105094 / 2964
2005 Ethylbenzene MR 2 SDWIS / OR4105094 / 2992
2005 CHLOROBENZENE MR 2 SDWIS / OR4105094 / 2989
2005 p-Dichlorobenzene MR 2 SDWIS / OR4105094 / 2969
2005 Styrene MR 2 SDWIS / OR4105094 / 2996
2005 trans-1,2-Dichloroethylene MR 2 SDWIS / OR4105094 / 2979
2005 2,4-D MR 2 SDWIS / OR4105094 / 2105
2005 2,4,5-TP MR 2 SDWIS / OR4105094 / 2110

How THE MARYLHURST SCHOOL Compares

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

Metric THE MARYLHURST SCHOOL Oregon avg Federal benchmark
Total violations 157 82.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 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 140 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 THE MARYLHURST SCHOOL water safe to drink? ▼
THE MARYLHURST SCHOOL (PWS ID: OR4105094) has 157 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 140 people using Groundwater sources.
How many people does THE MARYLHURST SCHOOL serve? ▼
THE MARYLHURST SCHOOL serves 140 people in OREGON CITY, Oregon. It is a Private-owned system using Groundwater water sources with 6 service connections.
What type of violations does THE MARYLHURST SCHOOL have? ▼
THE MARYLHURST SCHOOL has 157 total violations: 0 health-based violations (MCL exceedances or treatment failures), 156 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in THE MARYLHURST SCHOOL water? ▼
No PFAS testing data is available for THE MARYLHURST SCHOOL under the EPA's UCMR5 monitoring program.
What water source does THE MARYLHURST SCHOOL use? ▼
THE MARYLHURST 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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