Clean Water Act discharge permit · NPDES IN0023736
MARKLE WWTP, Markle, IN: NPDES IN0023736 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 24Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
MARKLE WWTP holds NPDES permit IN0023736, which discharges to Wabash River. EPA’s file records it issued December 26, 2019 and expiring February 28, 2025. 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 | MARKLE WWTP |
|---|---|
| Permittee as filed | MARKLE WWTP |
| NPDES ID | IN0023736 |
| 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 | December 26, 2019 |
| Expiration date | February 28, 2025 |
| Issuing agency | IDEM |
| Address | Markle, IN 46770 |
| Receiving water | WABASH RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Griffin Ditch-Wabash River (HUC 051201010804) |
| Program components on file | CSO, POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
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
- 25Pollutants on file
- 24Under a numeric limit
- 12With a violation of any kind
- 6With 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 | 18 | 6 | July 31, 2004 | 300% over the limit |
| Phosphorus, total percent removal | 1 | 6 | 3 | January 31, 2003 | 25% over the limit |
| E. coli, MTEC-MF | 0 | 3 | 3 | June 30, 1999 | 26% over the limit |
| Phosphorus, total [as P] | 2 | 5 | 2 | August 31, 1999 | 20% over the limit |
| E. coli, colony forming units [CFU] | 3 | 2 | 2 | June 30, 2008 | 24% over the limit |
| Oxygen, dissolved [DO] | 1 | 4 | 1 | September 30, 2000 | 58% over the limit |
| Solids, total suspended | 4 | 12 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 12 | 0 | ||
| pH | 2 | 7 | 0 | ||
| Nickel, total recoverable | 4 | 6 | 0 | ||
| Zinc, total recoverable | 4 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 6 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 3 | 0 | 0 | ||
| Toxicity [chronic], Ceriodaphnia dubia | 3 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 3 | 0 | 0 | ||
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | 3 | 0 | 0 | ||
| Copper, dry weight | 2 | 0 | 0 | ||
| Cadmium, dry weight | 2 | 0 | 0 | ||
| Number of Events | 2 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 2 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 2 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 2 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 2 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 2 | 0 | 0 | ||
| Flow, total | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IN0023736.
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| January 13, 2026 | Evaluation | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES IN0023736.
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, IN0023736.
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 IN0023736 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.