# UNITED AIRLINES, SF MAINTENANCE CENTER, SAN FRANCISCO INTNL AIRPORT CA: EPA ECHO compliance status: Significant Violation

**Remediation Urgency Score:** 83/100

| Field | Value |
|---|---|
| Facility | UNITED AIRLINES, SF MAINTENANCE CENTER |
| EPA Registry ID | 110008261585 |
| Address | 400 SFO AIRPORT FL BUILDING 49, SAN FRANCISCO INTNL AIRPORT, CA, 94128 |
| County | SAN MATEO |
| Industry (NAICS) | 488111: Air Traffic Control |
| SIC | 4953: Refuse Systems |
| Overall compliance status | Significant Violation |
| Significant noncomplier | Yes |
| Quarters in noncompliance (last 12) | 12 |
| Clean Air Act | Violation Unaddressed; Local Has Lead Enforcement |
| RCRA | No Violation Identified |
| Formal enforcement actions (5 years) | 4 |
| Total penalties | $35,000 |
| Last penalty | 11/22/2021 |
| Inspections (5 years) | 9 |
| Last inspection | 2025-07-23 |
| Watershed | San Francisco Bay |

## Why this score
- Flagged as a significant noncomplier, the highest EPA priority tier.
- 12 of the last 12 quarters in noncompliance.
- Current violation under CAA.
- 4 formal enforcement action(s) in 5 years.
- $35,000 in penalties.

Source: U.S. EPA ECHO (Enforcement and Compliance History Online) (https://echo.epa.gov/detailed-facility-report?fid=110008261585). Last refreshed: 2026-11-03T18:05:36.266Z.
Compliance data comes from EPA ECHO and may lag state records; a violation flag is not a finding of wrongdoing. Informational only; not legal or engineering advice.