Public water system · WA5337016
ActiveColumbia Rock and Aggregates
At a glance
Columbia Rock and Aggregates (PWSID WA5337016) is an active non-transient non-community water system in Clark County, Washington. It reports serving 21 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 1999.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
21
Service connections
2
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Columbia Rock and Aggregates compare with other water systems in Clark County?
By EPA's size categories, Columbia Rock and Aggregates is a very small system (500 people or fewer). Clark County has 72 active public water systems. Its population served is well below the county average of 9,076 people per system, and accounts for less than 0.1% of the 653,450 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 Columbia Rock and Aggregates is well below 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 Columbia Rock and Aggregates?
EPA lists Columbia Rock and Aggregates 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. 48 of the 72 active systems in Clark County (67%) are also privately owned.
Does Columbia Rock and Aggregates have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 1999. The violations listed here began between August 1992 and January 1999. By type: 4 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 1999-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | 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.
Columbia Rock and Aggregates: frequently asked questions
Who runs Columbia Rock and Aggregates?
Columbia Rock and Aggregates (PWSID WA5337016) is a non-transient non-community water system privately owned. It is regulated by the WA state drinking water program.
How many people does Columbia Rock and Aggregates serve?
Columbia Rock and Aggregates reports serving 21 people through 2 service connections in Clark County, Washington.
Where does Columbia Rock and Aggregates 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 Columbia Rock and Aggregates 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 1999. 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 Columbia Rock and Aggregates' 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 1999. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Columbia Rock and Aggregates' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Columbia Rock and Aggregates 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 Clark County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Vancouver City of | Clark | 373,047 | Community | Groundwater |
| Clark Public Utilities | Clark | 153,526 | Community | Groundwater |
| Camas Municipal Water Sewer System | Clark | 31,794 | Community | Groundwater |
| Battle Ground Water Dept City of | Clark | 30,237 | Community | Groundwater |
| Washougal City of | Clark | 21,441 | Community | Groundwater |
| Ridgefield Public Works | Clark | 21,225 | 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, “Columbia Rock and Aggregates, PWSID WA5337016, Washington”, https://aquacensus.com/water-systems/washington/columbia-rock-and-aggregates-wa5337016 (data as of October 1, 2026).