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Review government records associated with Lake Oswego, Oregon.
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Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Public water-system records for Lake Oswego, OR from EPA SDWIS.
Lake Oswego Municipal Water
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
Purchased or imported water record · Serves 40,000 people
Data from EPA SDWIS
Reviewed: source records as of Q1 2026
EPA UCMR5 — No PFAS detection records shown for these water systems
Open data source: EPA UCMR5DoD PFAS — No investigation records shown for this report
Open data source: DoD PFASEPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Oswego Creek-Willamette River
Reported: Nov 2026
Health-relevant causes: Dioxins, Mercury, Metals (other Than Mercury), Pathogens, Pesticides, Polychlorinated Biphenyls (pcbs), Toxic Organics
Affected uses: Drinkingwater, Ecological, Fishconsumption, Other, Recreation
Data from EPA ATTAINS
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
Violation records
Last inspected: Dec 2025
Last inspected: Dec 2025
Data from EPA ECHO
To investigate water contamination, check the sampling locations, dates and results below. For tap water records, see Drinking water quality above.
Reviewed: source records as of 2026
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
Clackamas County
Assessment year: 2020
According to EPA, a cancer risk of 80-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 80 may develop cancer from that exposure. This is in addition to cancer risk from all other causes.
Top modeled source groups
Data from EPA AirToxScreen
EPA designates an area as nonattainment when air quality does not meet federal health-based standards (NAAQS) for a specific pollutant.
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
Portland Area: Portland Metro Service District Boundary
CO · Carbon Monoxide (1971 Standard)
Classification: Moderate <= 12.7ppm
Original designation: Nov 1990
Current design value: 1.5 ppm (2023-2025)
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Carus - Spangler Road (Spr) — Portland, Oregon
Annual mean: 0.041 Parts per million
EPA primary exceedance count: 2 (Ozone 8-hour 2015)
Observation year: 2025
Hillsboro - Hare Field (Hhf)
Annual mean: 5.5 Micrograms/cubic meter (LC)
Observation year: 2025
Portland - Helensview School (Pch)
Annual mean: 7.5 Micrograms/cubic meter (25 C)
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
TRI releases are self-reported annual totals (calendar year 2024). Hover fugitive or stack for definitions.
Fiskars Brands Gerber Legendary Blades Div
Reported: 2024
Reviewed: source query run Nov 2026
Brownfield sites are properties where redevelopment is complicated by the presence of hazardous substances.
Open data source: Search EPA ECHO1 site with active cleanup or investigation status
16719 16759 Boones Ferry Road 5126 5110 West Sunset Drive, Lake Oswego
Reported: Feb 2026
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
Reviewed: reporting year 2024
No MSHA mine or extraction site records shown for this report.
Clackamas County, OR
EPA Radon Zone Map (June 2024 release)
Clackamas County is EPA Radon Zone 3 (low potential). EPA defines Zone 3 counties as having predicted average indoor screening levels below 2 pCi/L.
Radon levels can vary from home to home, so EPA recommends testing the property to know its indoor level.
FEMA flood zones describe mapped flood hazards. Look up a specific address with FEMA.
Minimal flood hazard — outside the 1% and 0.2% annual chance floodplains.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
EPA ECHO lists facilities linked to the Risk Management Program. Results include facilities with locations that can be matched. Records may be historical. Current operations, chemical inventories, and recent accident history are unverified.
Reviewed: 2000-present
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Clackamas County, OregonPop. 423,177
County Health Rankings edition: 2024
Premature Death
Poor or Fair Health
Poor Physical Health Days
Poor Mental Health Days
Adult Smoking
Adult Obesity
Air Pollution - Particulate Matter
Drinking water violation indicator
Diabetes Prevalence
Life Expectancy
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 5,578 | 6,705 | 7,972 |
| Poor or Fair Health | 12.1% | 14.2% | 14.2% |
| Poor Physical Health Days | 3.1 | 3.3 | 3.3 |
| Poor Mental Health Days | 5.1 | 5.4 | 4.8 |
| Adult Smoking | 12.3% | 12.7% | 15.0% |
| Adult Obesity | 31.6% | 30.6% | 34.0% |
| Air Pollution - Particulate Matter | 10.1 | 7.7 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 7.4% | 8.3% | 9.6% |
| Life Expectancy | 80.2 | 78.7 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Lake Oswego.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 3 violations for Lake Oswego Municipal Water.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
Nearby EPA monitoring stations provide annual air quality measurements for Lake Oswego.
The monitoring station at Carus-Spangler Road (Spr), Portland, Oregon recorded an annual average of 0.041 Parts per million for ozone in 2025.
The monitoring station at Hillsboro-Hare Field (Hhf) recorded an annual average of 5.5 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The monitoring station at Portland-Helensview School (Pch) recorded an annual average of 7.5 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The radon data for Lake Oswego covers Clackamas County. EPA places this area in Zone 3, with a predicted average indoor radon screening level below 2 picocuries per liter.
No Superfund sites were returned for this city report.
This city report shows 1 brownfield site: Boones Ferry Affordable Housing Site.
The county data for Lake Oswego reports a life expectancy of 80.2 years in Clackamas County, Oregon.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Lake Oswego reports 5,578 years of life lost to deaths before age 75 per 100,000 residents in Clackamas County, Oregon. This measure adds up the years lost to early deaths and adjusts for differences in population age.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Lake Oswego lists fine-particle pollution (PM2.5) at 10.1 micrograms per cubic meter in Clackamas County, Oregon.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.