Public water system · OR4195261
ActiveSouth Slough Reserve
At a glance
South Slough Reserve (PWSID OR4195261) is an active transient non-community water system in Coos County, Oregon. It reports serving 55 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 6 violations for this system; none is health-based, and the most recent began in February 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
55
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does South Slough Reserve compare with other water systems in Coos County?
By EPA's size categories, South Slough Reserve is a very small system (500 people or fewer). Coos County has 45 active public water systems. Its population served is well below the county average of 1,143 people per system, and accounts for 0.1% of the 51,436 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 South Slough Reserve is about 62% 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,175 Oregon systems (86%) list groundwater as their primary source.
Who owns and regulates South Slough Reserve?
EPA lists South Slough Reserve as owned by a state government. 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. 2 of the 45 active systems in Coos County (4.4%) are also owned by a state government.
Does South Slough Reserve have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in February 2025. The violations listed here began between January 2005 and February 2025. By type: 5 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2025-02-01 | MonitoringMonitoring, Additional Routine (RTCR) · code 3B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 6 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.
South Slough Reserve: frequently asked questions
Who runs South Slough Reserve?
South Slough Reserve (PWSID OR4195261) is a transient non-community water system owned by a state government. It is regulated by the OR state drinking water program.
How many people does South Slough Reserve serve?
South Slough Reserve reports serving 55 people through 1 service connection in Coos County, Oregon.
Where does South Slough Reserve get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does South Slough Reserve have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in February 2025. 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 South Slough Reserve'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. EPA's records list 6 violations for this system; none is health-based, and the most recent began in February 2025. For current results, consult EPA ECHO, or the OR state drinking water program.
Where can I find South Slough Reserve's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. South Slough Reserve 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 Coos County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Coos Bay North Bend Wtr Brd | Coos | 34,500 | Community | Surface water |
| Coquille, City of | Coos | 3,953 | Community | Surface water |
| Bandon, City of | Coos | 3,000 | Community | Surface water |
| Myrtle Point, City of | Coos | 2,656 | Community | Surface water |
| Lakeside Water District | Coos | 1,800 | Community | Surface water |
| Oprd Bullards Beach State Pk | Coos | 1,400 | 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, “South Slough Reserve, PWSID OR4195261, Oregon”, https://aquacensus.com/water-systems/oregon/south-slough-reserve-or4195261 (data as of October 1, 2026).