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Airports, Flying Fields, & Services, Louisville, Kentucky. NPDES permit KY0092177, in force until Apr 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| pH | minimum | ≥ 6 SU | May–Oct | 001 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| pH | daily maximum | ≤ 9 SU | May–Oct | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 001 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | all year | 001 |
| Surfactants [MBAS] | monthly average | report only (mg/L) | all year | 001 |
| Surfactants [MBAS] | 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 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 001 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 001 |
| pH | minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| pH | minimum | ≥ 6 SU | May–Oct | 002 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| pH | daily maximum | ≤ 9 SU | May–Oct | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 002 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | all year | 002 |
| Surfactants [MBAS] | monthly average | report only (mg/L) | all year | 002 |
| Surfactants [MBAS] | daily maximum | report only (mg/L) | all year | 002 |
| 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 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 002 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 002 |
| pH | minimum | ≥ 6 SU | May–Oct | 003 |
| pH | minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| pH | daily maximum | ≤ 9 SU | May–Oct | 003 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 003 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | all year | 003 |
| Surfactants [MBAS] | monthly average | report only (mg/L) | all year | 003 |
| Surfactants [MBAS] | daily maximum | report only (mg/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | 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 |
| pH | minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, Nov, Dec | 004 |
| pH | minimum | ≥ 6 SU | May–Oct | 004 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, Nov, Dec | 004 |
| pH | daily maximum | ≤ 9 SU | May–Oct | 004 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 004 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | all year | 004 |
| Surfactants [MBAS] | monthly average | report only (mg/L) | all year | 004 |
| Surfactants [MBAS] | daily maximum | report only (mg/L) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 004 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 004 |
| pH | minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| pH | minimum | ≥ 6 SU | May–Oct | 006 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| pH | daily maximum | ≤ 9 SU | May–Oct | 006 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 006 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 006 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 006 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 006 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | all year | 006 |
| Surfactants [MBAS] | monthly average | report only (mg/L) | all year | 006 |
| Surfactants [MBAS] | daily maximum | report only (mg/L) | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 006 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 006 |
| pH | minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, Nov, Dec | 007 |
| pH | minimum | ≥ 6 SU | May–Oct | 007 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, Nov, Dec | 007 |
| pH | daily maximum | ≤ 9 SU | May–Oct | 007 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 007 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 007 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 007 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | all year | 007 |
| Surfactants [MBAS] | monthly average | report only (mg/L) | all year | 007 |
| Surfactants [MBAS] | daily maximum | report only (mg/L) | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | 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 |
Cited limits by parameter: Kentucky's rules and the federal ones.
Same industry: the 8 Transportation by Air permits in Kentucky.
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