Public water system · WA5305427
ActiveTwin Harbor Community Well
At a glance
Twin Harbor Community Well (PWSID WA5305427) is an active transient non-community water system in Pacific County, Washington. It reports serving 21 people through 19 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2008.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
21
Service connections
19
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Twin Harbor Community Well compare with other water systems in Pacific County?
By EPA's size categories, Twin Harbor Community Well is a very small system (500 people or fewer). Pacific County has 38 active public water systems. Its population served is well below the county average of 888 people per system, and accounts for less than 0.1% of the 33,728 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 Twin Harbor Community Well 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. 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 Twin Harbor Community Well?
EPA lists Twin Harbor Community Well as privately owned. 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. 24 of the 38 active systems in Pacific County (63%) are also privately owned.
Does Twin Harbor Community Well have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2008. The violations listed here began between January 2008 and January 2008. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Pentachlorophenol (2 of them). EPA lists 11 as archived and 1 as resolved. 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. 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 |
|---|---|---|---|---|
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4,5-TP (Silvex)code 2110 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Hexachlorocyclopentadienecode 2042 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endrincode 2005 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Picloramcode 2040 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Pentachlorophenolcode 2326 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toxaphenecode 2020 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Pentachlorophenolcode 2326 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Di(2-ethylhexyl) phthalatecode 2039 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Simazinecode 2037 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzo(a)pyrenecode 2306 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dinosebcode 2041 | No | Archived |
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.
Twin Harbor Community Well: frequently asked questions
Who runs Twin Harbor Community Well?
Twin Harbor Community Well (PWSID WA5305427) is a transient non-community water system privately owned. It is regulated by the WA state drinking water program.
How many people does Twin Harbor Community Well serve?
Twin Harbor Community Well reports serving 21 people through 19 service connections in Pacific County, Washington.
Where does Twin Harbor Community Well 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 Twin Harbor Community Well 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 January 2008. 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 Twin Harbor Community Well'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 January 2008. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Twin Harbor Community Well's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Twin Harbor Community Well 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 Pacific County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| North Beach Water | Pacific | 8,093 | Community | Groundwater |
| Long Beach Water Department | Pacific | 4,628 | Community | Surface water |
| Raymond Water Department | Pacific | 4,620 | Community | Surface water |
| South Bend Water Department | Pacific | 2,930 | Community | Surface water |
| Ilwaco Water Department City of | Pacific | 2,757 | Community | Surface water |
| Surfside Homeowners | Pacific | 2,687 | 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, “Twin Harbor Community Well, PWSID WA5305427, Washington”, https://aquacensus.com/water-systems/washington/twin-harbor-community-well-wa5305427 (data as of October 1, 2026).