What the Issaquah records show
- Water quality and PFAS
- 1 candidate water system shown.Source date: Violations as of Q1 2026
- Air quality and emissions
- 3 monitoring records shown. Observation year: 2025.Source date: AQS data as of 2026
- Land and cleanup records
- No Superfund records returned in this report; No brownfield records returned in this report.
- Infrastructure and incidents
- No pipeline incident records returned in this report; No RMP facility records returned in this report (earlier stored inventory, current location coverage unverified).
Water quality in Issaquah
Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Drinking Water Compliance
Drinking Water Compliance
Public water-system records for Issaquah, WA from EPA SDWIS.
Issaquah Water System
Active monitoring or reporting issue detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
Purchased or imported water record · Serves 43,584 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 PFASImpaired Water Bodies
1
Impaired Water Bodies
EPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Lake Sammamish-Sammamish River
Retrieved: Nov 2026
Health-relevant causes: Metals (other Than Mercury), Pathogens
Affected uses: Ecological, Recreation
Data from EPA ATTAINS
Discharge Permits (NPDES)
3
Discharge Permits (NPDES)
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
Air quality and emissions in Issaquah
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
EPA AirToxScreen — Estimated Cancer Risk
EPA AirToxScreen — Estimated Cancer Risk
King 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
Nonattainment Status
Nonattainment Status
EPA designations apply to a specific pollutant and federal air quality standard (NAAQS). EPA can issue a clean-data determination while a formal designation remains in effect.
Maintenance areas
EPA redesignated these areas to attainment under approved maintenance plans.
Seattle-Tacoma Area
CO · Carbon Monoxide (1971 Standard)
Classification: Moderate > 12.7ppm
Original designation: Nov 1990
Reported design value: 0.9 ppm (2023–2025)
Data from EPA Green Book
Air Quality Monitoring (AQS)
Air Quality Monitoring (AQS)
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Issaquah - Lake Sammamish (Wiithin Lake Sammamish State Park)
Annual mean: 0.036 Parts per million
Observation year: 2025
Kent-S 236Th St
Annual mean: 5.1 Micrograms/cubic meter (LC)
Observation year: 2025
North Bend - North Bend Way — North Bend (Northbend), Washington
Annual mean: 0.037 Parts per million
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
Reviewed: source records as of 2024
Land cleanup and hazardous waste records in Issaquah
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
State Remediation & Cleanup Sites
2
State Remediation & Cleanup Sites
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
800 FRONT ST, ISSAQUAH
0.7 miles away · King County
Reported: Nov 2026
1500 19th Ave NW, Issaquah
1.0 miles away · King County
Reported: Nov 2026
Data from EPA ECHO
Hazardous Waste — RCRA Handlers
3
Hazardous Waste — RCRA Handlers
Facilities with hazardous-waste handler records under RCRA in the reviewed 5-mile city-center search area. Active handler status is separate from air, water, or other ECHO compliance violations, which are shown in their own sections.
Active RCRA handler records in the reviewed city search area
Underground Storage Tanks
1
Underground Storage Tanks
Release reports
Reported: Dec 2021
Data from EPA UST Finder
Reviewed: reporting year 2024
MSHA Mine and Extraction Sites
1
MSHA Mine and Extraction Sites
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
County radon potential
County radon potential
King County, WA
EPA Radon Zone Map (June 2024 release)
King 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 and infrastructure in Issaquah
FEMA Flood Zones
FEMA Flood Zones
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.
EPA Risk Management Program Records
EPA Risk Management Program Records
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.
Community Health Indicators
Community Health Indicators
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
King County, WashingtonPop. 2,266,789
County Health Rankings edition: 2024
Premature Death
- County
- 5,119
- State
- 6,333
- National
- 7,972
Poor or Fair Health
- County
- 11.5%
- State
- 13.8%
- National
- 14.2%
Poor Physical Health Days
- County
- 3.0
- State
- 3.5
- National
- 3.3
Poor Mental Health Days
- County
- 4.9
- State
- 5.2
- National
- 4.8
Adult Smoking
- County
- 9.0%
- State
- 10.8%
- National
- 15.0%
Adult Obesity
- County
- 23.3%
- State
- 28.7%
- National
- 34.0%
Air Pollution - Particulate Matter
- County
- 8.3
- State
- 7.1
- National
- 7.3
Drinking water violation indicator
- County
- No
- State
- N/A
- National
- N/A
Diabetes Prevalence
- County
- 7.1%
- State
- 7.9%
- National
- 9.6%
Life Expectancy
- County
- 81.6
- State
- 79.4
- National
- 77.6
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 5,119 | 6,333 | 7,972 |
| Poor or Fair Health | 11.5% | 13.8% | 14.2% |
| Poor Physical Health Days | 3.0 | 3.5 | 3.3 |
| Poor Mental Health Days | 4.9 | 5.2 | 4.8 |
| Adult Smoking | 9.0% | 10.8% | 15.0% |
| Adult Obesity | 23.3% | 28.7% | 34.0% |
| Air Pollution - Particulate Matter | 8.3 | 7.1 | 7.3 |
| Drinking water violation indicator | No | N/A | N/A |
| Diabetes Prevalence | 7.1% | 7.9% | 9.6% |
| Life Expectancy | 81.6 | 79.4 | 77.6 |
Environmental questions about Issaquah, Washington
Has PFAS been found in the water in Issaquah, Washington?
This report does not have PFAS sample results for the candidate water systems in Issaquah.
Check with the utility that serves your address for its testing results.
What do EPA records say about tap water in Issaquah, Washington?
EPA drinking water records on this page list 3 violations for Issaquah Water System.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
What do annual air monitors show near Issaquah, Washington?
Nearby EPA monitoring stations provide annual air quality measurements for Issaquah.
The monitoring station at Issaquah-Lake Sammamish (Wiithin Lake Sammamish State Park) recorded an annual average of 0.036 Parts per million for ozone in 2025.
The monitoring station at Kent-S 236th St recorded an annual average of 5.1 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The monitoring station at North Bend-North Bend Way, North Bend (Northbend), Washington recorded an annual average of 0.037 Parts per million for ozone in 2025.
Download 2025 EPA annual monitor dataCurrent air quality on AirNow
Is there radon in Issaquah, Washington?
The radon data for Issaquah covers King County. EPA places this area in Zone 3, with a predicted average indoor radon screening level below 2 picocuries per liter.
Are there Superfund or brownfield sites near Issaquah, Washington?
No Superfund or brownfield sites were returned for this city report.
What is the life expectancy in Issaquah, Washington?
The county data for Issaquah reports a life expectancy of 81.6 years in King County, Washington.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
What does the data say about premature deaths in Issaquah, Washington?
The county data for Issaquah reports 5,119 years of life lost to deaths before age 75 per 100,000 residents in King 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.
Is there air pollution in Issaquah, Washington?
The county data for Issaquah lists fine-particle pollution (PM2.5) at 8.3 micrograms per cubic meter in King County, Washington.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.