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St. Louis Airport Authority

Airports, Flying Fields, & Services, St. Louis, Missouri. NPDES permit MO0111210 expired Mar 31, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 006 form M monthly (10 values), outfall 007 form M monthly (7 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (19)

ParameterStatisticLimitMonthsOutfall
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year006
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year006
pHminimum≥ 6.5 SUall year006
pHmaximum≤ 9 SUall year006
Solids, total suspendeddaily maximumreport only (mg/L)all year006
Solids, total suspendeddaily maximumreport only (mg/L)all year006
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year006
Chloridedaily maximumreport only (mg/L)all year006
Chloridedaily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec006
Rainfalldaily maximumreport only (in)all year006
Storm water flowdaily maximumreport only (MGD)all year006
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year007
pHminimum≥ 6.5 SUall year007
pHmaximum≤ 9 SUall year007
Solids, total suspendeddaily maximumreport only (mg/L)all year007
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year007
Chloridedaily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec007
Rainfalldaily maximumreport only (in)all year007
Storm water flowdaily maximumreport only (MGD)all year007

How strict are these limits?

Cited limits by parameter: Missouri's rules and the federal ones.

Same industry: the 9 Transportation by Air permits in Missouri.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0111210 · MCP: https://passage-data.com/mcp