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Review government records associated with Snohomish, Washington.
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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 Snohomish, WA from EPA SDWIS.
Snohomish City of
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
Purchased or imported water record · Serves 11,258 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.
Snohomish River-Frontal Possession Sound
Reported: Nov 2026
Health-relevant causes: Pathogens
Affected uses: Ecological, 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
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.
Snohomish County
Assessment year: 2020
According to EPA, a cancer risk of 30-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 30 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.
Seattle-Tacoma Area
CO · Carbon Monoxide (1971 Standard)
Classification: Moderate > 12.7ppm
Original designation: Nov 1990
Current design value: 0.9 ppm (2023-2025)
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Everett-Beverly Park Rd
Annual mean: 7.3 Micrograms/cubic meter (25 C)
Observation year: 2025
Annual mean: 4.3 Micrograms/cubic meter (LC)
Observation year: 2025
Marysville - 7Th Ave (Marysville Junior High)
Annual mean: 8.0 Micrograms/cubic meter (LC)
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
State environmental agencies maintain cleanup site databases that include state Superfund, voluntary cleanup, and brownfield remediation programs. These programs track additional sites beyond those on the federal NPL.
2 sites with active cleanup or investigation
506 4TH ST, SNOHOMISH
0.9 miles away · Snohomish County
Reported: Nov 2026
1229 1ST ST, SNOHOMISH
1.3 miles away · Snohomish County
Reported: Nov 2026
Data from EPA ECHO
Release reports
Reported: Dec 2021
Reported: Dec 2021
Reported: Dec 2021
Data from EPA UST Finder
Sites regulated by the Mine Safety and Health Administration, including mines, sand and gravel operations, and portable crushers. Status and type are from the MSHA Mine Data Retrieval System. Records with active/intermittent status dates older than 5 years are shown as older records rather than current active sites.
No records shown in this group.
Reviewed: status dates within last 5 years
Data from MSHA
Snohomish County, WA
EPA Radon Zone Map (June 2024 release)
Snohomish 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.
Special Flood Hazard Area — 1% annual chance of flooding (100-year floodplain). No base flood elevation determined.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
No EPA ECHO RMP facility records with a usable location matched this city report.
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Snohomish County, WashingtonPop. 840,079
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 | 5,824 | 6,333 | 7,972 |
| Poor or Fair Health | 13.4% | 13.8% | 14.2% |
| Poor Physical Health Days | 3.7 | 3.5 | 3.3 |
| Poor Mental Health Days | 5.4 | 5.2 | 4.8 |
| Adult Smoking | 11.6% | 10.8% | 15.0% |
| Adult Obesity | 32.3% | 28.7% | 34.0% |
| Air Pollution - Particulate Matter | 8.5 | 7.1 | 7.3 |
| Drinking water violation indicator | No | N/A | N/A |
| Diabetes Prevalence | 8.1% | 7.9% | 9.6% |
| Life Expectancy | 79.8 | 79.4 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Snohomish.
Check with the utility that serves your address for its testing results.
The EPA drinking water records available here list no violations for the City of Snohomish.
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 Snohomish.
The monitoring station at Everett-Beverly Park Rd recorded an annual average of 7.3 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The monitoring station at Everett-Beverly Park Rd recorded an annual average of 4.3 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The monitoring station at Marysville-7Th Ave (Marysville Junior High) recorded an annual average of 8 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The radon data for Snohomish covers Snohomish County. EPA places this area in Zone 3, with a predicted average indoor radon screening level below 2 picocuries per liter.
No Superfund or brownfield sites were returned for this city report.
The county data for Snohomish reports a life expectancy of 79.8 years in Snohomish County, Washington.
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 Snohomish reports 5,824 years of life lost to deaths before age 75 per 100,000 residents in Snohomish County, Washington. 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 Snohomish lists fine-particle pollution (PM2.5) at 8.5 micrograms per cubic meter in Snohomish County, Washington.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.