Public water system · WA5393195
ActiveWsu Iarec - Prosser
At a glance
Wsu Iarec - Prosser (PWSID WA5393195) is an active non-transient non-community water system in Benton County, Washington. It reports serving 224 people through 20 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
224
Service connections
20
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Wsu Iarec - Prosser compare with other water systems in Benton County?
By EPA's size categories, Wsu Iarec - Prosser is a very small system (500 people or fewer). Benton County has 108 active public water systems. Its population served is well below the county average of 2,712 people per system, and accounts for less than 0.1% of the 292,896 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Wsu Iarec - Prosser is about half of that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Washington has 400 active non-transient non-community water systems, 8.5% 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 Wsu Iarec - Prosser?
EPA lists Wsu Iarec - Prosser 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. 5 of the 108 active systems in Benton County (4.6%) are also owned by a state government.
Does Wsu Iarec - Prosser have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2022. The violations listed here began between November 1992 and January 2022. By type: 4 monitoring and reporting. The contaminants or rules involved are Total trihalomethanes (TTHM), Haloacetic acids (HAA5), Nitrate and Total coliform bacteria (TCR). EPA lists 2 as resolved and 2 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 |
|---|---|---|---|---|
| 2022-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1992-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 4 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.
Wsu Iarec - Prosser: frequently asked questions
Who runs Wsu Iarec - Prosser?
Wsu Iarec - Prosser (PWSID WA5393195) is a non-transient non-community water system owned by a state government. It is regulated by the WA state drinking water program.
How many people does Wsu Iarec - Prosser serve?
Wsu Iarec - Prosser reports serving 224 people through 20 service connections in Benton County, Washington.
Where does Wsu Iarec - Prosser 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 Wsu Iarec - Prosser have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2022. 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 Wsu Iarec - Prosser'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 4 violations for this system; none is health-based, and the most recent began in January 2022. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Wsu Iarec - Prosser's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Wsu Iarec - Prosser is a non-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 Benton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kennewick City of | Benton | 118,164 | Community | Surface water |
| Richland City of | Benton | 106,499 | Community | Surface water |
| West Richland City of | Benton | 21,231 | Community | Purchased surface water |
| Prosser City of | Benton | 12,070 | Community | Groundwater |
| Energy Dept of/200w | Benton | 6,351 | Non-transient non-community | Surface water |
| Benton City Water | Benton | 5,626 | 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, “Wsu Iarec - Prosser, PWSID WA5393195, Washington”, https://aquacensus.com/water-systems/washington/wsu-iarec-prosser-wa5393195 (data as of October 1, 2026).