Public water system · WA5334301
ActiveYak Co - Buena Water System
At a glance
Yak Co - Buena Water System (PWSID WA5334301) is an active community water system in Yakima County, Washington. It reports serving 952 people through 238 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in November 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
952
Service connections
238
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Yak Co - Buena Water System compare with other water systems in Yakima County?
By EPA's size categories, Yak Co - Buena Water System is a small system (501 to 3,300 people). Yakima County has 217 active public water systems. Its population served is about 23% below the county average of 1,230 people per system, and accounts for 0.4% of the 266,832 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 Yak Co - Buena Water System 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 Yak Co - Buena Water System?
EPA lists Yak Co - Buena Water System 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 217 active systems in Yakima County (9.7%) are also owned by a local government.
Does Yak Co - Buena Water System have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in November 2023. The violations listed here began between December 1992 and November 2023. By type: 3 monitoring and reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 3 as archived and 2 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 |
|---|---|---|---|---|
| 2023-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1997-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 5 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.
Yak Co - Buena Water System: frequently asked questions
Who runs Yak Co - Buena Water System?
Yak Co - Buena Water System (PWSID WA5334301) is a community water system owned by a local government. It is regulated by the WA state drinking water program.
How many people does Yak Co - Buena Water System serve?
Yak Co - Buena Water System reports serving 952 people through 238 service connections in Yakima County, Washington.
Where does Yak Co - Buena Water System 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 Yak Co - Buena Water System have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in November 2023. 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 Yak Co - Buena Water System'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 5 violations for this system; 1 is health-based, and the most recent began in November 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Yak Co - Buena Water System's water quality report?
As a community water system, Yak Co - Buena Water System 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 Yakima County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Yakima Water Division City of | Yakima | 112,858 | Community | Surface water |
| Nob Hill Water Association | Yakima | 38,050 | Community | Groundwater |
| Sunnyside City of | Yakima | 17,194 | Community | Groundwater |
| Grandview City of | Yakima | 11,010 | Community | Groundwater |
| Selah City of | Yakima | 9,331 | Community | Groundwater |
| Toppenish Water Department | Yakima | 8,950 | 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, “Yak Co - Buena Water System, PWSID WA5334301, Washington”, https://aquacensus.com/water-systems/washington/yak-co-buena-water-system-wa5334301 (data as of October 1, 2026).