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Airports, Flying Fields, & Services, Denver County, Colorado. NPDES permit COS000008 expired Oct 31, 2014; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 001 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 001 |
| pH | daily maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| pH | daily maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease | instantaneous maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Oil and grease | instantaneous maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Oil and grease | instantaneous maximum | report only (mg/L) | all year | 001 |
| Oil and grease | instantaneous maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 001 |
| Propylene glycol, total | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Propylene glycol, total | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Propylene glycol, total | daily maximum | report only (mg/L) | all year | 001 |
| Propylene glycol, total | daily maximum | report only (mg/L) | all year | 001 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 001 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 003 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 003 |
| pH | daily maximum | report only (SU) | all year | 003 |
| pH | daily maximum | report only (SU) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Oil and grease | instantaneous maximum | report only (mg/L) | all year | 003 |
| Oil and grease | instantaneous maximum | report only (mg/L) | all year | 003 |
| Propylene glycol, total | daily maximum | report only (mg/L) | all year | 003 |
| Propylene glycol, total | daily maximum | 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 and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 003 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 003 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 008 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 008 |
| pH | daily maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| pH | daily maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| pH | daily maximum | report only (SU) | all year | 008 |
| pH | daily maximum | report only (SU) | all year | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 008 |
| Oil and grease | instantaneous maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Oil and grease | instantaneous maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Oil and grease | instantaneous maximum | report only (mg/L) | all year | 008 |
| Oil and grease | instantaneous maximum | report only (mg/L) | all year | 008 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 008 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 008 |
| Propylene glycol, total | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Propylene glycol, total | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Propylene glycol, total | daily maximum | report only (mg/L) | all year | 008 |
| Propylene glycol, total | daily maximum | report only (mg/L) | all year | 008 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 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 and grease visual | instantaneous maximum | report only (N=0;Y=1) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 008 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 008 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 008 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 009 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 009 |
| pH | daily maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| pH | daily maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| pH | daily maximum | report only (SU) | all year | 009 |
| pH | daily maximum | report only (SU) | all year | 009 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 009 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 009 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 009 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 009 |
| Oil and grease | instantaneous maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Oil and grease | instantaneous maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Oil and grease | instantaneous maximum | report only (mg/L) | all year | 009 |
| Oil and grease | instantaneous maximum | report only (mg/L) | all year | 009 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 009 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 009 |
| Propylene glycol, total | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Propylene glycol, total | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Propylene glycol, total | daily maximum | report only (mg/L) | all year | 009 |
| Propylene glycol, total | daily maximum | report only (mg/L) | all year | 009 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 009 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 009 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 009 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 009 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 009 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 010 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 010 |
| pH | daily maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| pH | daily maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| pH | daily maximum | report only (SU) | all year | 010 |
| pH | daily maximum | report only (SU) | all year | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 010 |
| Oil and grease | instantaneous maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Oil and grease | instantaneous maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Oil and grease | instantaneous maximum | report only (mg/L) | all year | 010 |
| Oil and grease | instantaneous maximum | report only (mg/L) | all year | 010 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 010 |
| Propylene glycol, total | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Propylene glycol, total | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Propylene glycol, total | daily maximum | report only (mg/L) | all year | 010 |
| Propylene glycol, total | daily maximum | report only (mg/L) | all year | 010 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 010 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 010 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 010 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 010 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 010 |
Cited limits by parameter: Colorado's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/COS000008 · MCP: https://passage-data.com/mcp