Clean Water Act discharge permit · NPDES MO0111210
ST. LOUIS LAMBERT INTERNATIONAL AIRPORT, St. Louis, MO: NPDES MO0111210 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
ST. LOUIS LAMBERT INTERNATIONAL AIRPORT, held by St. Louis Airport Authority, holds NPDES permit MO0111210, which discharges to 8-20-13 Mudd V1.0. EPA’s file records it issued December 6, 2017 and expiring March 31, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ST. LOUIS LAMBERT INTERNATIONAL AIRPORT |
|---|---|
| Permittee as filed | St. Louis Airport Authority |
| NPDES ID | MO0111210 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | December 6, 2017 |
| Expiration date | March 31, 2021 |
| Address | St. Louis, MO 63145 |
| Receiving water | 8-20-13 MUDD V1.0 |
| Subwatershed | Maline Creek-Mississippi River (HUC 071401010401) |
| NAICS | 488111 – Air Traffic Control |
| SIC | 4581 – Airports, Flying Fields, & Services |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 16Pollutants on file
- 10Under a numeric limit
- 14With a violation of any kind
- 8With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 0 | 218 | 218 | April 30, 2012 | 99,999% over the limit |
| Solids, total suspended | 3 | 191 | 172 | August 31, 2012 | 3,367% over the limit |
| Oxygen demand, chem. [high level] [COD] | 3 | 111 | 108 | April 30, 2012 | 3,511% over the limit |
| Carbon, tot organic [TOC] | 0 | 86 | 82 | April 30, 2012 | 5,500% over the limit |
| pH | 4 | 37 | 31 | October 31, 2023 | |
| Oil and grease [soxhlet extr.] tot. | 2 | 9 | 5 | October 31, 2024 | 153% over the limit |
| Methyl tert-butyl ether [MTBE] | 0 | 2 | 2 | May 31, 2012 | 2,400% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 6 | 1 | May 31, 2006 | 2,300% over the limit |
| Rainfall | 0 | 103 | 0 | ||
| Ethylbenzene | 0 | 46 | 0 | ||
| Chloride | 3 | 3 | 0 | ||
| Acetate, Total | 2 | 3 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 0 | ||
| Propylene glycol, total | 2 | 2 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 15, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.