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Airports, Flying Fields, & Services, Columbus, Ohio. NPDES permit OH0124311, in force until Feb 29, 2028. Last 12 months: over a limit 9 times (last July 2026), 6 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| October 2025 | 006 | Oxygen, dissolved [DO], daily minimum | 4.64 | ≥ 5 mg/L | 7% |
| November 2025 | 002 | BOD, carbonaceous [5 day, 20 C], monthly average | 220 | ≤ 200 mg/L | 10% |
| January 2026 | 002 | Oxygen, dissolved [DO], daily minimum | 0 | ≥ 4 mg/L | 100% |
| January 2026 | 006 | Oxygen, dissolved [DO], daily minimum | 3.38 | ≥ 5 mg/L | 32% |
| January 2026 | 008 | Oxygen, dissolved [DO], daily minimum | .34 | ≥ 5 mg/L | 93% |
| March 2026 | 002 | Propylene glycol, total, monthly average | 88800 | ≤ 71000 ug/L | 25% |
| March 2026 | 006 | Oxygen, dissolved [DO], daily minimum | 3.16 | ≥ 5 mg/L | 37% |
| May 2026 | 002 | pH, daily minimum | 6.21 | ≥ 6.5 SU | — |
| July 2026 | 006 | Oxygen, dissolved [DO], daily minimum | 2.6 | ≥ 5 mg/L | 48% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 001 |
| pH | daily minimum | report only (SU) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 001 |
| Propylene glycol, total | monthly average | report only (ug/L) | all year | 001 |
| Propylene glycol, total | daily maximum | report only (ug/L) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | May–Oct | 002 |
| pH | daily minimum | ≥ 6.5 SU | May–Oct | 002 |
| pH | daily minimum | ≥ 6.5 SU | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| pH | daily maximum | ≤ 9 SU | May–Oct | 002 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 002 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | May–Oct | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | May–Oct | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Propylene glycol, total | monthly average | ≤ 71000 ug/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Propylene glycol, total | daily maximum | ≤ 640000 ug/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | May–Oct | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 200 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | May–Oct | 002 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 003 |
| pH | daily minimum | report only (SU) | all year | 003 |
| pH | daily maximum | report only (SU) | all year | 003 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 003 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 003 |
| Propylene glycol, total | monthly average | report only (ug/L) | all year | 003 |
| Propylene glycol, total | daily maximum | report only (ug/L) | all year | 003 |
| pH | daily minimum | report only (SU) | all year | 004 |
| pH | daily maximum | report only (SU) | all year | 004 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 004 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 004 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | May–Oct | 006 |
| pH | daily minimum | ≥ 6.5 SU | May–Oct | 006 |
| pH | daily minimum | ≥ 6.5 SU | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| pH | daily maximum | ≤ 9 SU | May–Oct | 006 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 006 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 006 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 006 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 006 |
| Rainfall | monthly average | report only (in) | all year | 006 |
| Rainfall | daily maximum | report only (in) | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | May–Oct | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | May–Oct | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| Propylene glycol, total | monthly average | ≤ 950000 ug/L | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| Propylene glycol, total | daily maximum | ≤ 1300000 ug/L | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | May–Oct | 006 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1300 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | May–Oct | 006 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 007 |
| pH | daily minimum | report only (SU) | all year | 007 |
| pH | daily maximum | report only (SU) | all year | 007 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 007 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 007 |
| Propylene glycol, total | monthly average | report only (ug/L) | all year | 007 |
| Propylene glycol, total | daily maximum | report only (ug/L) | all year | 007 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | May–Oct | 008 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 008 |
| pH | daily minimum | ≥ 6.5 SU | Jan, Feb, Mar, Apr, Nov, Dec | 008 |
| pH | daily minimum | ≥ 6.5 SU | May–Oct | 008 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, Nov, Dec | 008 |
| pH | daily maximum | ≤ 9 SU | May–Oct | 008 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 008 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 008 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | May–Oct | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Jan, Feb, Mar, Apr, Nov, Dec | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | May–Oct | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jan, Feb, Mar, Apr, Nov, Dec | 008 |
| Propylene glycol, total | monthly average | report only (ug/L) | Jan, Feb, Mar, Apr, Nov, Dec | 008 |
| Propylene glycol, total | daily maximum | report only (ug/L) | Jan, Feb, Mar, Apr, Nov, Dec | 008 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 008 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 008 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 008 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 008 |
| pH | daily minimum | report only (SU) | all year | 601 |
| pH | daily maximum | report only (SU) | all year | 601 |
| Oil and grease [soxhlet extr.] tot. | monthly average | report only (mg/L) | all year | 601 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 601 |
| Toluene | monthly average | report only (ug/L) | all year | 601 |
| Toluene | daily maximum | report only (ug/L) | all year | 601 |
| Benzene | monthly average | report only (ug/L) | all year | 601 |
| Benzene | daily maximum | report only (ug/L) | all year | 601 |
| Ethylbenzene | monthly average | report only (ug/L) | all year | 601 |
| Ethylbenzene | daily maximum | report only (ug/L) | all year | 601 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 601 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 601 |
| Xylene [mix of m+o+p] | monthly average | report only (ug/L) | all year | 601 |
| Xylene [mix of m+o+p] | daily maximum | report only (ug/L) | all year | 601 |
Cited limits by parameter: Ohio's rules and the federal ones.
Same industry: the 12 Transportation by Air permits in Ohio.
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