Public water system · WA53SP010
ActiveAlta Lake State Park
At a glance
Alta Lake State Park (PWSID WA53SP010) is an active transient non-community water system in Okanogan County, Washington. It reports serving 1,071 people through 90 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 9 violations for this system; 5 are health-based, and the most recent began in January 2006.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,071
Service connections
90
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Alta Lake State Park compare with other water systems in Okanogan County?
By EPA's size categories, Alta Lake State Park is a small system (501 to 3,300 people). Okanogan County has 119 active public water systems. Its population served is about 179% above the county average of 383 people per system, and accounts for 2.3% of the 45,608 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Alta Lake State Park is about 7.4 times 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. Washington has 1,913 active transient non-community water systems, 41% of the state's 4,705 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 4,370 Washington systems (93%) list groundwater as their primary source.
Who owns and regulates Alta Lake State Park?
EPA lists Alta Lake State Park as owned by a state government. The WA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 7 of the 119 active systems in Okanogan County (5.9%) are also owned by a state government.
Does Alta Lake State Park have drinking water violations?
EPA's records list 9 violations for this system; 5 are health-based, and the most recent began in January 2006. The violations listed here began between November 1991 and January 2006. By type: 5 contaminant level above the legal limit and 4 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (9 of them). EPA lists 9 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2006-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2005-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2004-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1993-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1992-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1992-08-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-07-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 9 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.
Alta Lake State Park: frequently asked questions
Who runs Alta Lake State Park?
Alta Lake State Park (PWSID WA53SP010) is a transient non-community water system owned by a state government. It is regulated by the WA state drinking water program.
How many people does Alta Lake State Park serve?
Alta Lake State Park reports serving 1,071 people through 90 service connections in Okanogan County, Washington.
Where does Alta Lake State Park 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 Alta Lake State Park have any drinking water violations?
EPA's records list 9 violations for this system; 5 are health-based, and the most recent began in January 2006. 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 Alta Lake State Park'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 9 violations for this system; 5 are health-based, and the most recent began in January 2006. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Alta Lake State Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Alta Lake State Park 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 Okanogan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Omak City of | Okanogan | 4,940 | Community | Groundwater |
| Brewster City of | Okanogan | 3,843 | Community | Groundwater |
| Okanogan Water Department City of | Okanogan | 3,817 | Community | Groundwater |
| Oroville City of | Okanogan | 3,256 | Community | Groundwater |
| Tonasket Water System | Okanogan | 2,398 | Community | Groundwater |
| Pearrygin Lake State Park - Both Cg | Okanogan | 2,103 | 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, “Alta Lake State Park, PWSID WA53SP010, Washington”, https://aquacensus.com/water-systems/washington/alta-lake-state-park-wa53sp010 (data as of October 1, 2026).