Public water system · OR4101180
ActiveUsace Bonneville Dam
At a glance
Usace Bonneville Dam (PWSID OR4101180) is an active non-transient non-community water system in Multnomah County, Oregon. It reports serving 109 people through 22 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
109
Service connections
22
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Usace Bonneville Dam compare with other water systems in Multnomah County?
By EPA's size categories, Usace Bonneville Dam is a very small system (500 people or fewer). Multnomah County has 58 active public water systems. Its population served is well below the county average of 14,736 people per system, and accounts for less than 0.1% of the 854,671 people reported by systems filed under the county. Across Oregon, the 2,536 active systems average 1,587 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Usace Bonneville Dam 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. Oregon has 346 active non-transient non-community water systems, 14% of the state's 2,536 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,175 Oregon systems (86%) list groundwater as their primary source.
Who owns and regulates Usace Bonneville Dam?
EPA lists Usace Bonneville Dam as owned by the federal government. The OR state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 3 of the 58 active systems in Multnomah County (5.2%) are also owned by the federal government.
Does Usace Bonneville Dam have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2023. The violations listed here began between January 2023 and January 2023. By type: 12 monitoring and reporting. The contaminants or rules involved are Methoxychlor, Heptachlor, Endothall and 2,4,5-TP (Silvex). EPA lists 12 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 |
|---|---|---|---|---|
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Methoxychlorcode 2015 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Heptachlorcode 2065 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endothallcode 2033 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4,5-TP (Silvex)code 2110 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Oxamylcode 2036 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Hexachlorobenzenecode 2274 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dinosebcode 2041 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Polychlorinated biphenyls (PCBs), totalcode 2383 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbofurancode 2046 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlordanecode 2959 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Lindane (gamma-BHC)code 2010 | No | Archived |
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.
Usace Bonneville Dam: frequently asked questions
Who runs Usace Bonneville Dam?
Usace Bonneville Dam (PWSID OR4101180) is a non-transient non-community water system owned by the federal government. It is regulated by the OR state drinking water program.
How many people does Usace Bonneville Dam serve?
Usace Bonneville Dam reports serving 109 people through 22 service connections in Multnomah County, Oregon.
Where does Usace Bonneville Dam 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 Usace Bonneville Dam 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 January 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 Usace Bonneville Dam'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 January 2023. For current results, consult EPA ECHO, or the OR state drinking water program.
Where can I find Usace Bonneville Dam's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Usace Bonneville Dam 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 Multnomah County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Portland Water Bureau | Multnomah | 666,200 | Community | Surface water |
| Gresham, City of | Multnomah | 73,932 | Community | Purchased surface water |
| Rockwood PUD | Multnomah | 65,443 | Community | Purchased surface water |
| Troutdale, City of | Multnomah | 16,185 | Community | Groundwater |
| Fairview, City of | Multnomah | 9,963 | Community | Groundwater |
| Wood Village, City of | Multnomah | 4,388 | 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, “Usace Bonneville Dam, PWSID OR4101180, Oregon”, https://aquacensus.com/water-systems/oregon/usace-bonneville-dam-or4101180 (data as of October 1, 2026).