Public water system · WA5334350
ActiveHoquiam Water Department
At a glance
Hoquiam Water Department (PWSID WA5334350) is an active community water system in Grays Harbor County, Washington. It reports serving 11,456 people through 3,879 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in December 1994.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
11,456
Service connections
3,879
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Hoquiam Water Department compare with other water systems in Grays Harbor County?
By EPA's size categories, Hoquiam Water Department is a large system (10,001 to 100,000 people). Grays Harbor County has 88 active public water systems, and Hoquiam Water Department is the 2nd-largest of them by population served. Its population served is about 11 times the county average of 1,013 people per system, and accounts for 13% 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 Hoquiam Water Department is about 71% above 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 140 Washington systems (3%) list surface water as their primary source.
Who owns and regulates Hoquiam Water Department?
EPA lists Hoquiam Water Department 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 Hoquiam Water Department have drinking water violations?
EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in December 1994. The violations listed here began between October 1979 and December 1994. By type: 9 monitoring and reporting and 1 required treatment not met. The contaminants or rules involved are Surface Water Treatment Rule, Mercury, Fluoride and Cadmium. EPA lists 10 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 |
|---|---|---|---|---|
| 1994-12-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Archived |
All 10 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.
Hoquiam Water Department: frequently asked questions
Who runs Hoquiam Water Department?
Hoquiam Water Department (PWSID WA5334350) is a community water system owned by a local government. It is regulated by the WA state drinking water program.
How many people does Hoquiam Water Department serve?
Hoquiam Water Department reports serving 11,456 people through 3,879 service connections in Grays Harbor County, Washington.
Where does Hoquiam Water Department get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Hoquiam Water Department have any drinking water violations?
EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in December 1994. 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 Hoquiam Water Department'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 10 violations for this system; 1 is health-based, and the most recent began in December 1994. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Hoquiam Water Department's water quality report?
As a community water system, Hoquiam Water Department 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 |
| 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 |
| Grays Harbor Co Water Dist 2 | Grays Harbor | 5,112 | 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, “Hoquiam Water Department, PWSID WA5334350, Washington”, https://aquacensus.com/water-systems/washington/hoquiam-water-department-wa5334350 (data as of October 1, 2026).