Clean Water Act discharge permit · NPDES WI0071323
ONEIDA WWTF, Oneida, WI: NPDES WI0071323 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 31Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
ONEIDA WWTF holds NPDES permit WI0071323. EPA’s file records it issued March 15, 2018 and expiring March 11, 2023. 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 | ONEIDA WWTF |
|---|---|
| Permittee as filed | ONEIDA WWTF |
| NPDES ID | WI0071323 |
| 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 | March 15, 2018 |
| Expiration date | March 11, 2023 |
| Address | Oneida, WI 54155 |
| Subwatershed | Oneida Creek (HUC 040302040103) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 33Pollutants on file
- 31Under a numeric limit
- 26With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 10 | 105 | 40 | July 31, 2025 | 580% over the limit |
| E. coli | 4 | 10 | 6 | May 31, 2021 | 402% over the limit |
| Solids, total suspended | 10 | 85 | 4 | May 31, 2020 | 61% over the limit |
| Oxygen, dissolved [DO] | 2 | 17 | 3 | March 31, 2024 | 83% over the limit |
| Nitrogen, ammonia total [as N] | 12 | 31 | 2 | December 31, 2018 | 32% over the limit |
| BOD, 5-day, percent removal | 2 | 18 | 2 | August 31, 2011 | 420% over the limit |
| Solids, suspended percent removal | 0 | 12 | 2 | March 31, 2011 | 127% over the limit |
| Mercury, total [as Hg] | 6 | 13 | 1 | June 30, 2022 | 33% over the limit |
| BOD, 5-day, 20 deg. C | 10 | 81 | 0 | ||
| pH | 8 | 55 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 53 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 0 | 31 | 0 | ||
| Arsenic, dry weight | 3 | 6 | 0 | ||
| Selenium, dry weight | 3 | 6 | 0 | ||
| Copper, dry weight | 3 | 6 | 0 | ||
| Cadmium, dry weight | 3 | 6 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 6 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 6 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 6 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 6 | 0 | ||
| Outfall observation,visual, y/n response | 2 | 5 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 2 | 4 | 0 | ||
| Pollutant table from 503.13 | 1 | 2 | 0 | ||
| Level of pathogen requirements achieved | 1 | 2 | 0 | ||
| Description of pathogen option used | 1 | 2 | 0 | ||
| Vector attraction reduction alternative used | 1 | 2 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 0 | 0 | ||
| Annual amt of sludge incinerated | 1 | 0 | 0 | ||
| Annual sludge production, total | 1 | 0 | 0 | ||
| Annual amount of sludge land applied | 1 | 0 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 0 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 0 | 0 | ||
| Annual amt sludge transported interstate | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 14, 2022 | Monitoring Violations - Frequency of Sampling Violation | EP6 |
| January 14, 2022 | Monitoring Violations - Improper Analysis or Lab Error | EP6 |
| January 14, 2022 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | EP6 |
| January 14, 2022 | Permit Violations - Violation Specified in Comment | EP6 |
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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Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.