ZIP 50552 (Knierim, IA) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 50552 in Knierim, Iowa (Calhoun County) has 3 EPA-tracked facilities, including 0 High-Risk sites (0.0%), 1 active violators, and $0 in federal penalties. Beyond industrial pollution, properties in ZIP 50552 are screened across 2 historical Calhoun County FEMA disasters, USDA Soil Foundation Shrink-Swell (HIGH signal), Tap Water & Watershed Permits (1), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 50552 (Knierim, IA) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 50552 (Knierim, IA) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 50552 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 0 High-Risk and 1 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 50552 (Knierim, IA)
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 • KNIERIM, IA (ZIP 50552 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| NEW COOPERATIVE INC. - KNIERIM-NH3 FREE PREVIEW (LOW RISK) | 101 MAIN ST, KNIERIM, IA 50552 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| KARDOES FARMS OAK PORK FREE PREVIEW (LOW RISK) | 1301 330TH ST, BURT, IA 50552 | LOW (8/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 50552 (Knierim, IA) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 50552 (Knierim, IA)?
ZIP code 50552 (Knierim, IA) contains 3 EPA-tracked facilities, of which 0 (0.0%) are classified in the High-Risk tier, 1 (33.3%) have active compliance violations, and 1 (33.3%) handle RCRA hazardous waste.
How does ZIP 50552 compare to Calhoun County and Iowa averages?
In ZIP 50552, 0.0% of regulated sites are rated High Risk, compared to 5.1% across Calhoun County and 1.6% statewide in Iowa.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 50552?
Geologic screening places ZIP 50552 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 50552 (Knierim, IA) in a FEMA flood zone and what is the flood disaster history?
Calhoun County has recorded 2 historical FEMA federal disaster declarations (2 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 50552 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 50552 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 50552 indicates a HIGH shrink-swell risk signal. Within ZIP 50552, federal registries track 0 SDWIS drinking water facilities, 1 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.