Clean Water Act discharge permit · NPDES OH0137731
EXPONENTIAL GENOMICS INC (XENOMICS), Springfield, OH: NPDES OH0137731 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
EXPONENTIAL GENOMICS INC (XENOMICS), held by Exponential Genomics Inc. (Xenomics), holds NPDES permit OH0137731, which discharges to Rock Run. EPA’s file records it issued November 10, 2017 and expiring November 30, 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 | EXPONENTIAL GENOMICS INC (XENOMICS) |
|---|---|
| Permittee as filed | Exponential Genomics Inc. (Xenomics) |
| NPDES ID | OH0137731 |
| 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 |
| Issued | November 10, 2017 |
| Expiration date | November 30, 2022 |
| Address | Springfield, OH 45504 |
| Receiving water | Rock Run |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Rock Run-Mad River (HUC 050800011805) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 10Pollutants on file
- 9Under a numeric limit
- 10With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 34 | 14 | February 29, 2016 | 133% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 26 | 6 | March 31, 2021 | 300% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 25 | 5 | February 28, 2015 | 80% over the limit |
| E. coli, MTEC-MF | 2 | 7 | 1 | August 31, 2013 | 59% over the limit |
| Flow rate | 2 | 18 | 0 | ||
| Turbidity [severity] | 2 | 18 | 0 | ||
| pH | 2 | 6 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 3 | 0 | ||
| Sludge waste from secondary clarifiers | 2 | 2 | 0 | ||
| Chlorine, total residual | 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 OH0137731.
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 OH0137731 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.