Clean Water Act discharge permit · NPDES MO0036757
AURORA WWTP, Aurora, MO: NPDES MO0036757 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
AURORA WWTP, held by City of Aurora, holds NPDES permit MO0036757, which discharges to Chat Cr.. EPA’s file records it issued October 17, 2018 and expiring March 31, 2023. 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 | AURORA WWTP |
|---|---|
| Permittee as filed | City of Aurora |
| NPDES ID | MO0036757 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | October 17, 2018 |
| Expiration date | March 31, 2023 |
| Address | Aurora, MO 65605 |
| Receiving water | Chat Cr. |
| Subwatershed | Headwaters Spring River (HUC 110702070101) |
| Program components on file | Biosolids, POTW |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler MOP000027516 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 24Pollutants on file
- 17Under a numeric limit
- 19With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Zinc, total recoverable | 2 | 29 | 2 | December 31, 2016 | 82% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 10 | 2 | March 31, 2018 | 55% over the limit |
| Coliform, fecal general | 0 | 20 | 1 | February 29, 2008 | 200% over the limit |
| pH | 2 | 11 | 1 | June 30, 2008 | |
| Solids, total suspended | 2 | 10 | 1 | June 30, 2008 | 64% over the limit |
| E. coli, colony forming units [CFU] | 0 | 120 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 38 | 0 | ||
| Cyanide, free [amenable to chlorination] | 0 | 29 | 0 | ||
| Cadmium, total recoverable | 0 | 29 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 8 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 7 | 0 | ||
| Selenium, total recoverable | 0 | 6 | 0 | ||
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 0 | 4 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 0 | 4 | 0 | ||
| E. coli | 2 | 2 | 0 | ||
| Solids, suspended percent removal | 1 | 2 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 2 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 2 | 1 | 0 | ||
| BOD, 5-day, percent removal | 1 | 1 | 0 | ||
| Nitrogen, total [as N] | 2 | 0 | 0 | ||
| Phosphorus, total [as P] | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 0 | 0 | ||
| Toxicity [chronic], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [chronic], 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 |
|---|---|---|
| October 6, 2017 | Effluent Violations - Numeric effluent violation | 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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MO0036757.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MO0036757 there.
Nearby on the register
- Discharge permits in Aurora
- Every permit record in Aurora, A to Z
- Discharge permits in Missouri
- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.