Clean Water Act discharge permit · NPDES MO0100129
DIXON WWTP, Dixon, MO: NPDES MO0100129 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
DIXON WWTP, held by City of Dixon, holds NPDES permit MO0100129, which discharges to Tributary To Maries River. EPA’s file records it issued November 14, 2016 and expiring March 31, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | DIXON WWTP |
|---|---|
| Permittee as filed | City of Dixon |
| NPDES ID | MO0100129 |
| 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 | November 14, 2016 |
| Expiration date | March 31, 2021 |
| Address | Dixon, MO 65459 |
| Receiving water | Tributary to Maries River |
| Subwatershed | Headwaters Maries River (HUC 102901110301) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 16Pollutants on file
- 11Under a numeric limit
- 16With a violation of any kind
- 9With 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 | 94 | 30 | August 31, 2015 | 809% over the limit |
| Solids, total suspended | 3 | 83 | 19 | August 31, 2018 | 6,456% over the limit |
| Ammonia [as N] + unionized ammonia | 0 | 18 | 18 | April 30, 2015 | 306% over the limit |
| E. coli | 4 | 32 | 14 | October 31, 2025 | 99,999% over the limit |
| Solids, suspended percent removal | 0 | 16 | 9 | June 30, 2026 | 107% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 80 | 7 | December 31, 2020 | 598% over the limit |
| BOD, 5-day, percent removal | 0 | 14 | 7 | March 31, 2026 | 65% over the limit |
| pH | 2 | 70 | 6 | April 30, 2017 | |
| Oil and grease [soxhlet extr.] tot. | 2 | 34 | 2 | July 31, 2014 | 45% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 40 | 0 | ||
| Phosphorus, total [as P] | 2 | 18 | 0 | ||
| Nitrogen, total [as N] | 2 | 12 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 6 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 6 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 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
- 16Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 16, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| December 16, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| May 30, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| May 30, 2025 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| May 30, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| May 30, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| December 17, 2020 | WW SSO - Failure to report violation that may endanger public health 122.41(l)(7) | ST6 |
| December 17, 2020 | Reporting Violations - Failure to Submit DMRs | ST6 |
| December 17, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 17, 2020 | Permit Violations - Failure to Submit Timely Permit Renewal Application | ST6 |
| December 17, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| December 17, 2020 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| December 17, 2020 | Effluent Violations - Narrative Effluent Violation | ST6 |
| December 17, 2020 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| January 6, 2020 | Reporting Violations - Failure to Submit DMRs | ST6 |
| January 6, 2020 | 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, MO0100129.
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 MO0100129 there.
Nearby on the register
- Discharge permits in Dixon
- Every permit record in Dixon, A to Z
- Discharge permits in Missouri
- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.