Public water system · WA5348704
ActiveUsace Illia Residential Area
At a glance
Usace Illia Residential Area (PWSID WA5348704) is an active community water system in Garfield County, Washington. It reports serving 46 people through 20 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 10 violations for this system; none is health-based, and the most recent began in February 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
46
Service connections
20
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Usace Illia Residential Area compare with other water systems in Garfield County?
By EPA's size categories, Usace Illia Residential Area is a very small system (500 people or fewer). Garfield County has 9 active public water systems, and Usace Illia Residential Area is the 5th-largest of them by population served. Its population served is well below the county average of 412 people per system, and accounts for 1.2% of the 3,712 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 Usace Illia Residential Area 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. 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 Usace Illia Residential Area?
EPA lists Usace Illia Residential Area as owned by the federal 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. 2 of the 9 active systems in Garfield County (22%) are also owned by the federal government.
Does Usace Illia Residential Area have drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in February 2016. The violations listed here began between October 1979 and February 2016. By type: 7 monitoring and reporting and 3 public notice, recordkeeping or other. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 9 as resolved and 1 as archived. 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. 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 |
|---|---|---|---|---|
| 2016-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2015-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2013-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2012-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | 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.
Usace Illia Residential Area: frequently asked questions
Who runs Usace Illia Residential Area?
Usace Illia Residential Area (PWSID WA5348704) is a community water system owned by the federal government. It is regulated by the WA state drinking water program.
How many people does Usace Illia Residential Area serve?
Usace Illia Residential Area reports serving 46 people through 20 service connections in Garfield County, Washington.
Where does Usace Illia Residential Area 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 Usace Illia Residential Area have any drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in February 2016. 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 Usace Illia Residential Area'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; none is health-based, and the most recent began in February 2016. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Usace Illia Residential Area's water quality report?
As a community water system, Usace Illia Residential Area 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 Garfield County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pomeroy City of | Garfield | 1,395 | Community | Groundwater |
| Garfield County Fairgrounds | Garfield | 1,250 | Transient non-community | Groundwater |
| Alpowa Summit Rest Area | Garfield | 801 | Transient non-community | Groundwater |
| Lower Granite Lock & Dam | Garfield | 120 | Non-transient non-community | Groundwater |
| Hiway Trailer Court | Garfield | 36 | Community | Groundwater |
| Dye Seed Ranch 1 | Garfield | 30 | 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, “Usace Illia Residential Area, PWSID WA5348704, Washington”, https://aquacensus.com/water-systems/washington/usace-illia-residential-area-wa5348704 (data as of October 1, 2026).