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Community Water System · PWS OR4100639

Timberline Rim Water Co Inc

Molalla, Oregon 97038 - drinking water served from groundwater sources to 800 people, tracked in EPA SDWIS and UCMR5.

800
People served
45
EPA violations
13
Health-based
Untested
UCMR5 result

The verdict

EPA records 45 drinking-water violations at Timberline Rim Water Co Inc, 29% of them health-based - below the Oregon per-system average.

45
Total EPA violations on record
29%
Health-based (MCL / treatment failure)
800
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Timberline Rim Water Co Inc

Timberline Rim Water Co Inc is a private-owned community water system that delivers drinking water to 800 residents in Molalla, Oregon (Clackamas County) through 407 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 45 total violations for this system , of which 13 (29%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 26 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 21 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. Statewide, 30 of 125 UCMR5-tested systems have reported PFAS detections (24%).

Timberline Rim Water Co Inc's 45 violations sit below the Oregon 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
800
Total Violations
45
Health-Based Violations
13
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
407
County
Clackamas
School/Daycare
No
MCL Violations
12
Monitoring Violations
26
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 21 2011
Coliform (TCR) MCL 12 2015
Consumer Confidence Rule Other 3 2024
Public Notice Other 2 2025
E. COLI MR 2 2011
Nitrate MR 1 1998
Gross Alpha, Excl. Radon and U MR 1 1976
Combined Radium (-226 and -228) MR 1 1976
LEAD AND COPPER RULE REVISIONS TT 1 2024

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 Timberline Rim Water Co Inc.

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 OR4100639 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 Public Notice Other 2 SDWIS / OR4100639 / 7500
2024 Consumer Confidence Rule Other 3 SDWIS / OR4100639 / 7000
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / OR4100639 / 5200
2015 Coliform (TCR) MCL 12 SDWIS / OR4100639 / 3100
2011 Coliform (TCR) MR 21 SDWIS / OR4100639 / 3100
2011 E. COLI MR 2 SDWIS / OR4100639 / 3014
1998 Nitrate MR 1 SDWIS / OR4100639 / 1040
1976 Gross Alpha, Excl. Radon and U MR 1 SDWIS / OR4100639 / 4000
1976 Combined Radium (-226 and -228) MR 1 SDWIS / OR4100639 / 4010

How Timberline Rim Water Co Inc Compares

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

Metric Timberline Rim Water Co Inc Oregon avg Federal benchmark
Total violations 45 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 13 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 800 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 (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 Timberline Rim Water Co Inc water safe to drink? ▼
Timberline Rim Water Co Inc (PWS ID: OR4100639) has 45 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 800 people using Groundwater sources.
How many people does Timberline Rim Water Co Inc serve? ▼
Timberline Rim Water Co Inc serves 800 people in Molalla, Oregon. It is a Private-owned system using Groundwater water sources with 407 service connections.
What type of violations does Timberline Rim Water Co Inc have? ▼
Timberline Rim Water Co Inc has 45 total violations: 13 health-based violations (MCL exceedances or treatment failures), 26 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Timberline Rim Water Co Inc water? ▼
No PFAS testing data is available for Timberline Rim Water Co Inc under the EPA's UCMR5 monitoring program.
What water source does Timberline Rim Water Co Inc use? ▼
Timberline Rim Water Co Inc 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.