Clean Water Act discharge permit · NPDES MO0057673
HAYTI WWTF, Hayti, MO: NPDES MO0057673 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 17Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
HAYTI WWTF, held by City of Hayti, holds NPDES permit MO0057673, which discharges to Ditch Number 22. EPA’s file records it issued October 16, 2019 and expiring June 30, 2021. 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 | HAYTI WWTF |
|---|---|
| Permittee as filed | City of Hayti |
| NPDES ID | MO0057673 |
| 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 | October 16, 2019 |
| Expiration date | June 30, 2021 |
| Address | Hayti, MO 63851 |
| Receiving water | Ditch Number 22 |
| Subwatershed | Ditch No 22-Main Ditch No 8 (HUC 080202040612) |
| 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
- 17Under a numeric limit
- 21With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| pH | 2 | 56 | 47 | May 31, 2025 | |
| Solids, suspended percent removal | 1 | 47 | 45 | May 31, 2025 | 186% over the limit |
| BOD, 5-day, percent removal | 1 | 43 | 41 | May 31, 2025 | 186% over the limit |
| E. coli | 2 | 33 | 33 | May 31, 2025 | 6,307,744% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 36 | 20 | December 31, 2023 | 151% over the limit |
| Chlorine, total residual | 0 | 18 | 18 | January 31, 2012 | 1,400% over the limit |
| Coliform, fecal general | 0 | 11 | 11 | June 30, 2013 | 1,350% over the limit |
| E. coli, colony forming units [CFU] | 0 | 7 | 7 | July 31, 2019 | 3,783% over the limit |
| Aluminum, total recoverable | 2 | 13 | 3 | March 31, 2017 | 17% over the limit |
| Solids, total suspended | 3 | 18 | 2 | June 30, 2023 | 63% over the limit |
| Cyanide, total recoverable | 0 | 56 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 34 | 0 | ||
| Nitrogen, ammonia total [as N] | 6 | 20 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 12 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 10 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 6 | 0 | ||
| Zinc, total recoverable | 0 | 6 | 0 | ||
| Chromium, total recoverable | 0 | 6 | 0 | ||
| Cyanide, free [amenable to chlorination] | 2 | 4 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 3 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 3 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 6 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 6 | 0 | 0 | ||
| Phosphorus, total [as P] | 6 | 0 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 2 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 1, 2025 | WW SSO - Failure to report violation that may endanger public health 122.41(l)(7) | ST6 |
| January 26, 2024 | Effluent Violations - Numeric effluent violation | ST6 |
| December 28, 2022 | Effluent Violations - Numeric effluent violation | ST6 |
| October 8, 2021 | Effluent Violations - Numeric effluent violation | 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.
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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 MO0057673 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.