Clean Water Act discharge permit · NPDES MO0114189
FCPWSD NO. 1 TWIN LAKES WWTP, Union, MO: NPDES MO0114189 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
FCPWSD NO. 1 TWIN LAKES WWTP, held by PWSD No. 1 of Franklin County, Missouri, holds NPDES permit MO0114189, which discharges to Tributary To Flat Creek. EPA’s file records it issued April 25, 2018 and expiring June 30, 2020. 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 | FCPWSD NO. 1 TWIN LAKES WWTP |
|---|---|
| Permittee as filed | PWSD No. 1 of Franklin County, Missouri |
| NPDES ID | MO0114189 |
| 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 | April 25, 2018 |
| Expiration date | June 30, 2020 |
| Address | Union, MO 63084 |
| Receiving water | Tributary to Flat Creek |
| Subwatershed | Birch Creek-Bourbuse River (HUC 071401030405) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 10Pollutants on file
- 8Under a numeric limit
- 10With a violation of any kind
- 3With 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 | 5 | 5 | June 30, 2025 | 848% over the limit |
| Solids, suspended percent removal | 1 | 3 | 3 | March 31, 2023 | 101% over the limit |
| BOD, 5-day, percent removal | 1 | 2 | 2 | March 31, 2023 | 33% over the limit |
| Oil and grease [soxhlet extr.] tot. | 2 | 19 | 0 | ||
| Temperature, water deg. centigrade | 0 | 5 | 0 | ||
| Ammonia [as N] + unionized ammonia | 0 | 5 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 2 | 0 | ||
| pH | 2 | 2 | 0 | ||
| Solids, total suspended | 2 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 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 |
|---|---|---|
| November 26, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| October 1, 2024 | Effluent Violations - Numeric effluent violation | ST6 |
| April 4, 2022 | Effluent Violations - Numeric effluent violation | ST6 |
| July 3, 2019 | 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.
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, MO0114189.
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 MO0114189 there.
Nearby on the register
- Discharge permits in Union
- Every permit record in Union, 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.