Public water system · WA5359700
ActiveNob Hill Water Association
At a glance
Nob Hill Water Association (PWSID WA5359700) is an active community water system in Yakima County, Washington. It reports serving 38,050 people through 13,619 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
38,050
Service connections
13,619
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Nob Hill Water Association compare with other water systems in Yakima County?
By EPA's size categories, Nob Hill Water Association is a large system (10,001 to 100,000 people). Yakima County has 217 active public water systems, and Nob Hill Water Association is the 2nd-largest of them by population served. Its population served is about 31 times the county average of 1,230 people per system, and accounts for 14% 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 Nob Hill Water Association is about 5.7 times 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 Nob Hill Water Association?
EPA lists Nob Hill Water Association as privately owned. 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. 182 of the 217 active systems in Yakima County (84%) are also privately owned.
Does Nob Hill Water Association have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2021. The violations listed here began between October 2021 and October 2021. By type: 12 monitoring and reporting. The contaminants or rules involved are Styrene, Tetrachloroethylene, Chlorobenzene and Ethylbenzene. EPA lists 12 as resolved. 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 |
|---|---|---|---|---|
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
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.
Nob Hill Water Association: frequently asked questions
Who runs Nob Hill Water Association?
Nob Hill Water Association (PWSID WA5359700) is a community water system privately owned. It is regulated by the WA state drinking water program.
How many people does Nob Hill Water Association serve?
Nob Hill Water Association reports serving 38,050 people through 13,619 service connections in Yakima County, Washington.
Where does Nob Hill Water Association 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 Nob Hill Water Association have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2021. 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 Nob Hill Water Association'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, none is health-based, and the most recent began in October 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Nob Hill Water Association's water quality report?
As a community water system, Nob Hill Water Association 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 |
| 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 |
| Yak Co - Terrace Heights | Yakima | 8,410 | 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, “Nob Hill Water Association, PWSID WA5359700, Washington”, https://aquacensus.com/water-systems/washington/nob-hill-water-association-wa5359700 (data as of October 1, 2026).