Clean Water Act discharge permit · NPDES MO0046655
HARDIN WWTF, Hardin, MO: NPDES MO0046655 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
HARDIN WWTF, held by City of Hardin, holds NPDES permit MO0046655, which discharges to Tributary To Norborne Drainage Ditch. EPA’s file records it issued December 6, 2013 and expiring December 31, 2018. 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 | HARDIN WWTF |
|---|---|
| Permittee as filed | City of Hardin |
| NPDES ID | MO0046655 |
| 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 6, 2013 |
| Expiration date | December 31, 2018 |
| Address | Hardin, MO 64035 |
| Receiving water | Tributary to Norborne Drainage Ditch |
| Subwatershed | Headwaters Moss Creek (HUC 103001011102) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 10Pollutants on file
- 8Under a numeric limit
- 8With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 3 | 34 | 18 | June 30, 2026 | 127% over the limit |
| Solids, total suspended | 3 | 25 | 7 | June 30, 2022 | 185% over the limit |
| Solids, suspended percent removal | 0 | 9 | 5 | June 30, 2026 | 109% over the limit |
| Oil and grease [soxhlet extr.] tot. | 2 | 11 | 1 | January 31, 2009 | 40% over the limit |
| pH | 1 | 42 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 20 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 8 | 0 | ||
| BOD, 5-day, percent removal | 0 | 4 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [acute], 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
- 6Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 15, 2026 | Reporting Violations - Failure to Submit DMRs | ST6 |
| March 25, 2026 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 29, 2025 | Reporting Violations - Failure to Submit DMRs | ST6 |
| September 23, 2025 | Reporting Violations - Failure to Submit DMRs | ST6 |
| November 16, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| March 22, 2023 | Permit Violations - Violation Specified in Comment | 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, MO0046655.
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 MO0046655 there.
Nearby on the register
- Discharge permits in Hardin
- Every permit record in Hardin, A to Z
- Discharge permits in Missouri
- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.