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Airports, Flying Fields, & Services, Madison, Wisconsin. NPDES permit WI0048747 expired Dec 31, 2019; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (ug/L) | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 034 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 034 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year | 034 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 034 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 034 |
| Phosphorus, total [as P] | daily maximum | report only (ug/L) | all year | 034 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 034 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 034 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 034 |
Cited limits by parameter: Wisconsin's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/WI0048747 · MCP: https://passage-data.com/mcp