Public water system · WA5335450
ActiveIllahee Oyehut
At a glance
Illahee Oyehut (PWSID WA5335450) is an active community water system in Grays Harbor County, Washington. It reports serving 971 people through 129 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in September 2000.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
971
Service connections
129
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Illahee Oyehut compare with other water systems in Grays Harbor County?
By EPA's size categories, Illahee Oyehut is a small system (501 to 3,300 people). Grays Harbor County has 88 active public water systems. Its population served is roughly in line with the county average of 1,013 people per system, and accounts for 1.1% of the 89,150 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active community water system reports serving 6,703 people, so Illahee Oyehut is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Washington has 2,392 active community water systems, 51% of the state's 4,705 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 53 Washington systems (1.1%) list purchased groundwater as their primary source.
Who owns and regulates Illahee Oyehut?
EPA lists Illahee Oyehut as owned by a local 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. 21 of the 88 active systems in Grays Harbor County (24%) are also owned by a local government.
Does Illahee Oyehut have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in September 2000. The violations listed here began between October 1979 and September 2000. By type: 9 monitoring and reporting and 3 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (7 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 |
|---|---|---|---|---|
| 2000-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2000-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1999-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1998-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | 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.
Illahee Oyehut: frequently asked questions
Who runs Illahee Oyehut?
Illahee Oyehut (PWSID WA5335450) is a community water system owned by a local government. It is regulated by the WA state drinking water program.
How many people does Illahee Oyehut serve?
Illahee Oyehut reports serving 971 people through 129 service connections in Grays Harbor County, Washington.
Where does Illahee Oyehut get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Illahee Oyehut have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in September 2000. 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 Illahee Oyehut'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, 3 are health-based, and the most recent began in September 2000. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Illahee Oyehut's water quality report?
As a community water system, Illahee Oyehut must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Grays Harbor County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Aberdeen City of | Grays Harbor | 22,867 | Community | Surface water |
| Hoquiam Water Department | Grays Harbor | 11,456 | Community | Surface water |
| Ocean Shores Water Dept | Grays Harbor | 9,347 | Community | Groundwater |
| Elma City of | Grays Harbor | 6,638 | Community | Groundwater |
| Montesano City of | Grays Harbor | 6,204 | Community | Groundwater |
| Westport Water Department | Grays Harbor | 5,346 | 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, “Illahee Oyehut, PWSID WA5335450, Washington”, https://aquacensus.com/water-systems/washington/illahee-oyehut-wa5335450 (data as of October 1, 2026).