ZIP 21045 (Columbia, MD) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 21045 in Columbia, Maryland (Howard County) has 185 EPA-tracked facilities, including 0 High-Risk sites (0.0%), 0 active violators, and $0 in federal penalties. Beyond industrial pollution, properties in ZIP 21045 are screened across 1 historical Howard County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (31), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 21045 (Columbia, MD) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 21045 (Columbia, MD) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 21045 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 0 High-Risk and 0 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 21045 (Columbia, MD)
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 • COLUMBIA, MD (ZIP 21045 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • COLUMBIA, MD (ZIP 21045 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • COLUMBIA, MD (ZIP 21045 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • COLUMBIA, MD (ZIP 21045 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • COLUMBIA, MD (ZIP 21045 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • COLUMBIA, MD (ZIP 21045 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • COLUMBIA, MD (ZIP 21045 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • COLUMBIA, MD (ZIP 21045 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| ALLIED-SIGNAL AEROSPACE CO. MICROELECTRONICS & TECHNOLOGY CNTR FREE PREVIEW (LOW RISK) | 9140 OLD ANNAPOLIS ROAD, COLUMBIA, MD 21045 | LOW (24/100) | No Violation Identified (0 qtrs NC) | $0 |
| ISP PHARMA SYSTEMS LLC FREE PREVIEW (LOW RISK) | 9165 RUMSEY RD BLDG PTC, COLUMBIA, MD 21045 | LOW (24/100) | No Violation Identified (0 qtrs NC) | $0 |
| IGENE BIOTECHNOLOGY FREE PREVIEW (LOW RISK) | 9110 RED BRANCH RD STE K, COLUMBIA, MD 21045 | LOW (23/100) | No Violation Identified (0 qtrs NC) | $0 |
| OAKLAND MILLS MIDDLE SCHOOL FREE PREVIEW (LOW RISK) | 9540 KILIMANJARO ROAD, COLUMBIA, MD 21045 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 21045 (Columbia, MD) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 21045 (Columbia, MD)?
ZIP code 21045 (Columbia, MD) contains 185 EPA-tracked facilities, of which 0 (0.0%) are classified in the High-Risk tier, 0 (0.0%) have active compliance violations, and 140 (75.7%) handle RCRA hazardous waste.
How does ZIP 21045 compare to Howard County and Maryland averages?
In ZIP 21045, 0.0% of regulated sites are rated High Risk, compared to 1.8% across Howard County and 1.8% statewide in Maryland.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 21045?
Geologic screening places ZIP 21045 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 21045 (Columbia, MD) in a FEMA flood zone and what is the flood disaster history?
Howard County has recorded 1 historical FEMA federal disaster declarations (0 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 21045 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 21045 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 21045 indicates a MODERATE shrink-swell risk signal. Within ZIP 21045, federal registries track 2 SDWIS drinking water facilities, 29 Clean Water NPDES permits, and 26 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.