Clean Water Act discharge permit · NPDES OH0037389
MAST ESTATES WWTP, Bluffton, OH: NPDES OH0037389 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
MAST ESTATES WWTP, held by Allen Co Bd of Comm, holds NPDES permit OH0037389, which discharges to Little Riley Creek. EPA’s file records it issued January 31, 2017 and expiring February 28, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MAST ESTATES WWTP |
|---|---|
| Permittee as filed | Allen Co Bd of Comm |
| NPDES ID | OH0037389 |
| 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 | January 31, 2017 |
| Expiration date | February 28, 2022 |
| Address | Bluffton, OH 45817 |
| Receiving water | Little Riley Creek |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 11Pollutants on file
- 11Under a numeric limit
- 4With a violation of any kind
- 4With 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] | 6 | 6 | 6 | June 30, 2014 | 246% over the limit |
| Solids, total suspended | 4 | 5 | 5 | March 31, 2019 | 97% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 7 | 3 | June 30, 2014 | 50% over the limit |
| E. coli, MTEC-MF | 2 | 3 | 3 | August 31, 2022 | 99,999% over the limit |
| Flow rate | 2 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Turbidity [severity] | 2 | 0 | 0 | ||
| Biosolids weight indluding admixtures | 2 | 0 | 0 | ||
| Sludge waste from secondary clarifiers | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Chlorine, total residual | 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 OH0037389.
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, OH0037389.
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 OH0037389 there.
Nearby on the register
- Discharge permits in Bluffton
- Every permit record in Bluffton, A to Z
- Discharge permits in Ohio
- Every permit record in Ohio, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.