ZIP 99116 (Coulee Dam, WA) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 99116 in Coulee Dam, Washington (Okanogan County) has 11 EPA-tracked facilities, including 1 High-Risk sites (9.1%), 1 active violators, and $70,881 in federal penalties. Beyond industrial pollution, properties in ZIP 99116 are screened across 12 historical Okanogan County FEMA disasters, USDA Soil Foundation Shrink-Swell (LOW signal), Tap Water & Watershed Permits (7), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 99116 (Coulee Dam, WA) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 99116 (Coulee Dam, WA) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 99116 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 1 High-Risk and 1 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 99116 (Coulee Dam, WA)
100% of High-Risk & penalized facilities have facility names, street names, and dockets redacted (3 Low-Risk compliant records shown as Free Previews).
| Facility Name / Hazard Type | Sector Location (Street Redacted) | Risk Score (0–100) | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • COULEE DAM, WA (ZIP 99116 Sector) | MODERATE (36/100) | Resolved / Historical Non-Compliance (5 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • COULEE DAM, WA (ZIP 99116 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • COULEE DAM, WA (ZIP 99116 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| CENTURYLINK QC W00981 COULEE DAM FREE PREVIEW (LOW RISK) | 103 GRANT AVE, COULEE DAM, WA 99116 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| COLVILLE FISH AND WILDLIFE FACILITY FREE PREVIEW (LOW RISK) | 68 SCHOOLHOUSE LOOP RD, COULEE DAM, WA 99116 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| LAKE ROOSEVELT SENIOR HIGH SCHOOL FREE PREVIEW (LOW RISK) | 500 CIVIC WAY, COULEE DAM, WA 99116 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| GRAND COULEE DAM FIRE HOUSE FREE PREVIEW (LOW RISK) | 205 INDUSTRIAL WAY, GRAND COULEE, WA 99116 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • COULEE DAM, WA (ZIP 99116 Sector) | LOW (11/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • NESPELEM, WA (ZIP 99116 Sector) | LOW (11/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — ZIP 99116 (Coulee Dam, WA) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 99116 (Coulee Dam, WA)?
ZIP code 99116 (Coulee Dam, WA) contains 11 EPA-tracked facilities, of which 1 (9.1%) are classified in the High-Risk tier, 1 (9.1%) have active compliance violations, and 3 (27.3%) handle RCRA hazardous waste.
How does ZIP 99116 compare to Okanogan County and Washington averages?
In ZIP 99116, 9.1% of regulated sites are rated High Risk, compared to 6.3% across Okanogan County and 5.2% statewide in Washington.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 99116?
Geologic screening places ZIP 99116 in EPA Zone 1 — High Potential (> 4.0 pCi/L). Property buyers should screen a 0.25-mile immediate buffer for vapor-intrusion sources and a 1.0-mile radius for CERCLA/RCRA sites.
Is ZIP 99116 (Coulee Dam, WA) in a FEMA flood zone and what is the flood disaster history?
Okanogan County has recorded 12 historical FEMA federal disaster declarations (4 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 99116 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 99116 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 99116 indicates a LOW shrink-swell risk signal. Within ZIP 99116, federal registries track 2 SDWIS drinking water facilities, 5 Clean Water NPDES permits, and 0 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.