Public water system · CA4700875
ActiveKlamath Basin National Wildlife Refuge
At a glance
Klamath Basin National Wildlife Refuge (PWSID CA4700875) is an active transient non-community water system in Siskiyou County, California. It reports serving 30 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in March 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
30
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Klamath Basin National Wildlife Refuge compare with other water systems in Siskiyou County?
By EPA's size categories, Klamath Basin National Wildlife Refuge is a very small system (500 people or fewer). Siskiyou County has 69 active public water systems. Its population served is well below the county average of 593 people per system, and accounts for less than 0.1% of the 40,908 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Klamath Basin National Wildlife Refuge 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. California has 3,016 active transient non-community water systems, 40% of the state's 7,479 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates Klamath Basin National Wildlife Refuge?
EPA lists Klamath Basin National Wildlife Refuge as owned by the federal government. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 15 of the 69 active systems in Siskiyou County (22%) are also owned by the federal government.
Does Klamath Basin National Wildlife Refuge have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in March 2025. The violations listed here began between August 2019 and March 2025. By type: 2 monitoring. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 2025-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
All 2 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.
Klamath Basin National Wildlife Refuge: frequently asked questions
Who runs Klamath Basin National Wildlife Refuge?
Klamath Basin National Wildlife Refuge (PWSID CA4700875) is a transient non-community water system owned by the federal government. It is regulated by the CA state drinking water program.
How many people does Klamath Basin National Wildlife Refuge serve?
Klamath Basin National Wildlife Refuge reports serving 30 people through 1 service connection in Siskiyou County, California.
Where does Klamath Basin National Wildlife Refuge 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 Klamath Basin National Wildlife Refuge have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in March 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 Klamath Basin National Wildlife Refuge'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 2 violations for this system; none is health-based, and the most recent began in March 2025. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Klamath Basin National Wildlife Refuge's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Klamath Basin National Wildlife Refuge 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 Siskiyou County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Yreka, City of | Siskiyou | 7,825 | Community | Surface water |
| Mt. Shasta, City of | Siskiyou | 3,642 | Community | Groundwater |
| Mt. Shasta Ski Park | Siskiyou | 3,500 | Transient non-community | Groundwater |
| Lake Shastina C.S.D | Siskiyou | 2,790 | Community | Groundwater |
| Weed, City of | Siskiyou | 2,662 | Community | Groundwater |
| Lake Siskiyou Campground | Siskiyou | 1,800 | Transient non-community | Surface water |
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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, “Klamath Basin National Wildlife Refuge, PWSID CA4700875, California”, https://aquacensus.com/water-systems/california/klamath-basin-national-wildlife-refuge-ca4700875 (data as of October 1, 2026).