EPA-regulated facilities near Sammamish, WA

There are 532 EPA-regulated facilities within 5 miles of Sammamish, Washington. The most common kinds are water discharge (338), hazardous waste (198), drinking water systems (8). 25 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 32 have a violation on record. Penalties over the last five years total $3.2M across 2 sites.

Open the map here

By category

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

• PUGET SOUND DEVELOPMENT 22854 SE 21ST ST, SAMMAMISH, WA, 98075 · 0.3 mi Significant noncompliance
• SAMMAMISH CITY 801 228TH AVE NE, SAMMAMISH, WA, 98075 · 0.4 mi Significant noncompliance
• BROWNSTONES WEST 22225 SE 4TH ST, SAMMAMISH, WA, 98074 · 0.8 mi Significant noncompliance
• EASTLAKE HIGH SCHOOL ADDITION 400 228TH AVE NE, SAMMAMISH, WA, 98074 · 1.3 mi Significant noncompliance
• TSENG SHORT PLAT 409 209TH AVE SE, SAMMAMISH, WA, 98074 · 1.3 mi Significant noncompliance
• ISSAQUAH HIGH SCHOOL #4 4221 228TH AVE SE, ISSAQUAH, WA, 98029 · 2.0 mi Significant noncompliance
• ISSAQUAH-FALLS CITY RD SUBDIVISION 24424 24424 SE ISSAQUAH-FALL CITY ROAD, ISSAQUAH, WA, 98029 · 2.6 mi Significant noncompliance
• REDMOND 10 2314 NE REDMOND FALL-CITY ROAD NE, REDMOND, WA, 98053 · 3.5 mi Significant noncompliance
• TOWNS ON 7TH 755 7TH AVE NW, ISSAQUAH, WA, 98027 · 3.6 mi Significant noncompliance
• ALCOTT ELEMENTARY SCHOOL REPLACEMENT 4213 228TH AVE NE, REDMOND, WA, 98053 · 3.6 mi Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

• COSTCO WHOLESALE CORP ISSAQUAH 999 LAKE DR, ISSAQUAH, WA, 98027 · 3.2 mi $3.1M in penalties
• DARIGOLD ISSAQUAH 611 FRONT ST N, ISSAQUAH, WA, 98027 · 4.0 mi $147k in penalties

Data centers

• BOEING COMPANY BELLEVUE 2750 160TH AVE SE, BELLEVUE, WA, 98007 · 4.3 mi
• EMC CORP 2010 156TH AVE NE STE 200, BELLEVUE, WA, 98007 · 5.0 mi

County

• King County

Nearby towns

• Issaquah 3 mi
• Bellevue 6 mi
• Union Hill-Novelty Hill 6 mi
• Redmond 7 mi
• Newcastle 7 mi
• East Renton Highlands 9 mi
• Snoqualmie 9 mi
• Mercer Island 9 mi

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. Distances are from the center of Sammamish as the Census Bureau records it. The Data page explains where each record comes from and how it can mislead.