Clean Water Act discharge permit · NPDES IN0021580
MONON WWTP, Monon, IN: NPDES IN0021580 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
MONON WWTP, held by MONON MUNICIPAL WWTP, holds NPDES permit IN0021580, which discharges to Tippecanoe R Via Mckillop Creek. EPA’s file records it issued August 23, 2016 and expiring November 30, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MONON WWTP |
|---|---|
| Permittee as filed | MONON MUNICIPAL WWTP |
| NPDES ID | IN0021580 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 23, 2016 |
| Expiration date | November 30, 2021 |
| Issuing agency | IDEM |
| Address | Monon, IN 47959 |
| Receiving water | TIPPECANOE R VIA MCKILLOP CREEK |
| Subwatershed | McKillip Ditch (HUC 051201061103) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 16Pollutants on file
- 14Under a numeric limit
- 16With a violation of any kind
- 11With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 8 | 167 | 143 | June 30, 2026 | 1,140% over the limit |
| Solids, total suspended | 8 | 127 | 105 | June 30, 2026 | 1,020% over the limit |
| Chlorine, total residual | 4 | 87 | 75 | June 30, 2026 | 3,435% over the limit |
| Phosphorus, total percent removal | 1 | 57 | 51 | July 31, 2024 | 189% over the limit |
| E. coli, colony forming units [CFU] | 3 | 61 | 50 | April 30, 2026 | 50,460% over the limit |
| Phosphorus, total [as P] | 1 | 50 | 37 | October 31, 2024 | 692% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 8 | 39 | 19 | June 30, 2026 | 126% over the limit |
| Oxygen, dissolved [DO] | 2 | 11 | 6 | August 31, 2025 | 80% over the limit |
| pH | 2 | 13 | 3 | July 31, 2021 | |
| Solids, suspended percent removal | 1 | 4 | 3 | August 31, 2023 | 100% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 3 | 2 | May 31, 2019 | 20% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 10 | 0 | ||
| Flow, total | 1 | 3 | 0 | ||
| Flow, wastewater by-passing trtmnt plant | 0 | 3 | 0 | ||
| Number of Events | 2 | 2 | 0 | ||
| Bypass valve | 0 | 1 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IN0021580.
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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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 IN0021580 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.