Public water system · OR4194426

Active

Olallie Lake Resort

At a glance

Olallie Lake Resort (PWSID OR4194426) is an active transient non-community water system in Jefferson County, Oregon. It reports serving 30 people through 1 service connection. Its primary water source is surface water, and EPA lists it as under public/private ownership. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2023.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

Service connections

Primary source

Surface water

System type

TNCWS

Transient non-community water system

System record

PWSIDOR4194426

System typeTransient non-community water system

Activity statusActive

Population served30

Service connections1

Primary water sourceSurface water

Owner typePublic/private partnership

Primacy agencyOR state drinking water program

City served—

StateOregon

ZIP—

CountyJefferson County

How does Olallie Lake Resort compare with other water systems in Jefferson County?

By EPA's size categories, Olallie Lake Resort is a very small system (500 people or fewer). Jefferson County has 31 active public water systems. Its population served is well below the county average of 866 people per system, and accounts for 0.1% of the 26,851 people reported by systems filed under the county. Across Oregon, the 2,536 active systems average 1,587 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Olallie Lake Resort is well below that figure.

What does “transient non-community water system” mean?

A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Oregon has 1,250 active transient non-community water systems, 49% of the state's 2,536 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 211 Oregon systems (8.3%) list surface water as their primary source.

Who owns and regulates Olallie Lake Resort?

EPA lists Olallie Lake Resort as under public/private ownership. The OR state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 1 of the 31 active systems in Jefferson County (3.2%) are also under public/private ownership.

Does Olallie Lake Resort have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2023. The violations listed here began between July 2012 and September 2023. By type: 9 monitoring and reporting and 3 monitoring. The contaminant or rule involved most often is Surface Water Treatment Rule (8 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.

Began	Violation	Contaminant or rule	Health-based	Status
2023-09-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2023-09-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2018-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2017-10-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2017-07-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2017-07-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2017-07-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2017-06-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2017-06-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2017-06-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2012-08-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2012-07-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved

The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

Olallie Lake Resort: frequently asked questions

Who runs Olallie Lake Resort?

Olallie Lake Resort (PWSID OR4194426) is a transient non-community water system under public/private ownership. It is regulated by the OR state drinking water program.

How many people does Olallie Lake Resort serve?

Olallie Lake Resort reports serving 30 people through 1 service connection in Jefferson County, Oregon.

Where does Olallie Lake Resort get its water?

EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.

Does Olallie Lake Resort have any drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2023. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is Olallie Lake Resort's water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2023. For current results, consult EPA ECHO, or the OR state drinking water program.

Where can I find Olallie Lake Resort's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Olallie Lake Resort is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

Other water systems in Jefferson County

Water system	County	Population served	Type	Source
Deschutes Valley Water Dist	Jefferson	11,700	Community	Groundwater
Crooked River Ranch Wtr Co	Jefferson	4,000	Community	Groundwater
Madras, City of	Jefferson	3,940	Community	Groundwater
Oprd Peter Ogden State Wayside	Jefferson	2,000	Transient non-community	Groundwater
Oprd Cove Palisades - Deschutes River	Jefferson	950	Transient non-community	Groundwater
Oprd Cove Palisades - Crooked River	Jefferson	600	Transient non-community	Groundwater

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About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Olallie Lake Resort, PWSID OR4194426, Oregon”, https://aquacensus.com/water-systems/oregon/olallie-lake-resort-or4194426 (data as of October 1, 2026).