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Airports, Flying Fields, & Services, Glen Burnie, Maryland. NPDES permit MD0063371, in force until May 31, 2030. Last 12 months: over a limit once (last June 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | Glycol, total, maximum monthly average | 51 % | ≤ 30 % | 70% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Glycol, total | maximum monthly average | ≤ 30 % | all year | 003 |
| Glycol, total | maximum monthly average | ≤ 30 % | all year | 003 |
| Glycol, total | daily maximum | report only (%) | all year | 003 |
| Glycol, total | daily maximum | report only (%) | all year | 003 |
| Glycol, total | monthly average | report only (ton/d) | all year | 003 |
| Glycol, total | monthly average | report only (ton/d) | all year | 003 |
| Glycol, total | monthly average | report only (ton/d) | all year | 003 |
| Glycol, total | monthly average | report only (ton/d) | all year | 003 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 003 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 003 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 003 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 003 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 003 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 003 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 003 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 006 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 006 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 007 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 007 |
| Glycol, total | maximum monthly average | ≤ 30 % | all year | 007 |
| Glycol, total | maximum monthly average | ≤ 30 % | all year | 007 |
| Glycol, total | daily maximum | report only (%) | all year | 007 |
| Glycol, total | daily maximum | report only (%) | all year | 007 |
| Glycol, total | monthly average | report only (ton/d) | all year | 007 |
| Glycol, total | monthly average | report only (ton/d) | all year | 007 |
| Glycol, total | monthly average | report only (ton/d) | all year | 007 |
| Glycol, total | monthly average | report only (ton/d) | all year | 007 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 007 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 007 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 007 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 007 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 007 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 007 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 007 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 007 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 008 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 008 |
| Glycol, total | maximum monthly average | ≤ 30 % | all year | 008 |
| Glycol, total | maximum monthly average | ≤ 30 % | all year | 008 |
| Glycol, total | daily maximum | report only (%) | all year | 008 |
| Glycol, total | daily maximum | report only (%) | all year | 008 |
| Glycol, total | monthly average | report only (ton/d) | all year | 008 |
| Glycol, total | monthly average | report only (ton/d) | all year | 008 |
| Glycol, total | monthly average | report only (ton/d) | all year | 008 |
| Glycol, total | monthly average | report only (ton/d) | all year | 008 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 008 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 008 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 008 |
| Glycol, total | daily maximum | report only (ton/d) | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 008 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 008 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 008 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 008 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 008 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 301 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 301 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (gal/d) | all year | 301 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (gal/d) | all year | 301 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 301 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 301 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 302 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 302 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (gal/d) | all year | 302 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (gal/d) | all year | 302 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 302 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 302 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 303 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 303 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (gal/d) | all year | 303 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (gal/d) | all year | 303 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 303 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 303 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 304 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 304 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (gal/d) | all year | 304 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (gal/d) | all year | 304 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 304 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 304 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 307 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 307 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (gal/d) | all year | 307 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (gal/d) | all year | 307 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 307 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 307 |
Cited limits by parameter: Maryland's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/MD0063371 · MCP: https://passage-data.com/mcp