Public water system · WA5328090
ActiveKopachuck Ridge Water District
At a glance
Kopachuck Ridge Water District (PWSID WA5328090) is an active community water system in Pierce County, Washington. It reports serving 185 people through 84 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in July 1995.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
185
Service connections
84
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Kopachuck Ridge Water District compare with other water systems in Pierce County?
By EPA's size categories, Kopachuck Ridge Water District is a very small system (500 people or fewer). Pierce County has 358 active public water systems. Its population served is well below the county average of 3,335 people per system, and accounts for less than 0.1% of the 1,193,797 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 Kopachuck Ridge Water District 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 Kopachuck Ridge Water District?
EPA lists Kopachuck Ridge Water District 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. 257 of the 358 active systems in Pierce County (72%) are also privately owned.
Does Kopachuck Ridge Water District have drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in July 1995. The violations listed here began between January 1992 and July 1995. By type: 2 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 1995-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1995-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1992-01-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 3 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.
Kopachuck Ridge Water District: frequently asked questions
Who runs Kopachuck Ridge Water District?
Kopachuck Ridge Water District (PWSID WA5328090) is a community water system privately owned. It is regulated by the WA state drinking water program.
How many people does Kopachuck Ridge Water District serve?
Kopachuck Ridge Water District reports serving 185 people through 84 service connections in Pierce County, Washington.
Where does Kopachuck Ridge Water District 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 Kopachuck Ridge Water District have any drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in July 1995. 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 Kopachuck Ridge Water District'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 3 violations for this system; 2 are health-based, and the most recent began in July 1995. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Kopachuck Ridge Water District's water quality report?
As a community water system, Kopachuck Ridge Water District 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 Pierce County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tacoma Water Division City of | Pierce | 446,170 | Community | Surface water |
| Puyallup City of | Pierce | 94,520 | Community | Purchased surface water |
| Lakewood Water District | Pierce | 82,425 | Community | Groundwater |
| Southwood | Pierce | 64,155 | Community | Purchased surface water |
| Bonney Lake Water Department City | Pierce | 43,371 | Community | Purchased surface water |
| Firgrove Mutual Inc. | Pierce | 36,168 | Community | Purchased surface water |
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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, “Kopachuck Ridge Water District, PWSID WA5328090, Washington”, https://aquacensus.com/water-systems/washington/kopachuck-ridge-water-district-wa5328090 (data as of October 1, 2026).