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Airports, Flying Fields, & Services, Detroit, Michigan. NPDES permit MI0036846 expired Oct 1, 2017; its limits still apply. Last 12 months: over a limit once (last February 2026), 116 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| February 2026 | BOD, carbonaceous [5 day, 20 C], daily maximum | 203 | ≤ 200 mg/L | 2% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 003 |
| Flow rate | daily minimum | ≥ 10 MGD | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 003 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Jun–Sep | 003 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 3.5 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 003 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Jun–Sep | 003 |
| pH | daily minimum | report only (SU) | Jun–Sep | 003 |
| pH | daily minimum | report only (SU) | Jun–Sep | 003 |
| pH | daily minimum | ≥ 6.5 SU | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 003 |
| pH | daily maximum | report only (SU) | Jun–Sep | 003 |
| pH | daily maximum | report only (SU) | Jun–Sep | 003 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun–Sep | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .5 mg/L | May | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun–Sep | 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 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Jun–Sep | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 81 mg/L | Jan, Feb, Oct, Nov, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 100 mg/L | Mar, Apr | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 56 mg/L | May | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 72 mg/L | Mar, Apr | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 56 mg/L | Jan, Feb, Oct, Nov, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 39 mg/L | May | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 49 mg/L | Mar, Apr | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 38 mg/L | Jan, Feb, Oct, Nov, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 27 mg/L | May | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 25 mg/L | Jan, Feb, Oct, Nov, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 32 mg/L | Mar, Apr | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 19 mg/L | May | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 13 mg/L | May | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 17 mg/L | Jan, Feb, Oct, Nov, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 23 mg/L | Mar, Apr | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 2 mg/L | May | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 2 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 6.5 mg/L | May | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 160 mg/L | May | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 290 mg/L | Mar, Apr | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 290 mg/L | Mar, Apr | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 230 mg/L | Jan, Feb, Oct, Nov, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 210 mg/L | Mar, Apr | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 120 mg/L | May | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 210 mg/L | Mar, Apr | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 170 mg/L | Jan, Feb, Oct, Nov, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 150 mg/L | Mar, Apr | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 82 mg/L | May | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 120 mg/L | Jan, Feb, Oct, Nov, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 150 mg/L | Mar, Apr | 003 |
| Chemical oxygen demand [COD] | daily maximum | report only (mg/L) | all year | 003 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 003 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 004 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Jun–Sep | 004 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 3.5 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 004 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Jun–Sep | 004 |
| pH | daily minimum | report only (SU) | Jun–Sep | 004 |
| pH | daily minimum | report only (SU) | Jun–Sep | 004 |
| pH | daily minimum | ≥ 6.5 SU | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 004 |
| pH | daily maximum | report only (SU) | Jun–Sep | 004 |
| pH | daily maximum | report only (SU) | Jun–Sep | 004 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun–Sep | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun–Sep | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .5 mg/L | May | 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 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Jun–Sep | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 48 mg/L | May | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 74 mg/L | Jan, Feb, Oct, Nov, Dec | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 85 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 59 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 33 mg/L | May | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 51 mg/L | Jan, Feb, Oct, Nov, Dec | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 41 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 35 mg/L | Jan, Feb, Oct, Nov, Dec | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 24 mg/L | May | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 23 mg/L | Jan, Feb, Oct, Nov, Dec | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 17 mg/L | May | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 27 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 12 mg/L | May | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 19 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 16 mg/L | Jan, Feb, Oct, Nov, Dec | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 2 mg/L | May | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 2 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 5.9 mg/L | May | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 140 mg/L | May | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 240 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 210 mg/L | Jan, Feb, Oct, Nov, Dec | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 240 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 97 mg/L | May | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 180 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 150 mg/L | Jan, Feb, Oct, Nov, Dec | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 180 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 120 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 69 mg/L | May | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 120 mg/L | Mar, Apr | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 110 mg/L | Jan, Feb, Oct, Nov, Dec | 004 |
| Chemical oxygen demand [COD] | daily maximum | report only (mg/L) | all year | 004 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 004 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 006 |
| Flow rate | daily minimum | ≥ 15 MGD | all year | 006 |
| Flow rate | daily minimum | ≥ 15 MGD | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 006 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Jun–Sep | 006 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 3.5 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 006 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Jun–Sep | 006 |
| pH | daily minimum | report only (SU) | Jun–Sep | 006 |
| pH | daily minimum | ≥ 6.5 SU | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 006 |
| pH | daily minimum | report only (SU) | Jun–Sep | 006 |
| pH | daily maximum | report only (SU) | Jun–Sep | 006 |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 006 |
| pH | daily maximum | report only (SU) | Jun–Sep | 006 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 006 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 006 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun–Sep | 006 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .5 mg/L | May | 006 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 006 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun–Sep | 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 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Jun–Sep | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Jun–Sep | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 47 mg/L | May | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 85 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 74 mg/L | Jan, Feb, Oct, Nov, Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 59 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 33 mg/L | May | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 51 mg/L | Jan, Feb, Oct, Nov, Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 41 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 35 mg/L | Jan, Feb, Oct, Nov, Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 23 mg/L | May | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 23 mg/L | Jan, Feb, Oct, Nov, Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 26 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 17 mg/L | May | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 11 mg/L | May | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 16 mg/L | Jan, Feb, Oct, Nov, Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 19 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 2 mg/L | May | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 2 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 5.8 mg/L | May | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 130 mg/L | May | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 240 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 240 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 200 mg/L | Jan, Feb, Oct, Nov, Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 95 mg/L | May | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 170 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 170 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 150 mg/L | Jan, Feb, Oct, Nov, Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 120 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | maximum | ≤ 68 mg/L | May | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 120 mg/L | Mar, Apr | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 110 mg/L | Jan, Feb, Oct, Nov, Dec | 006 |
| Chemical oxygen demand [COD] | daily maximum | report only (mg/L) | all year | 006 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 006 |
Cited limits by parameter: Michigan's rules and the federal ones.
Same industry: the 3 Transportation by Air permits in Michigan.
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On EPA ECHO: Facility report · DMR history
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