Clean Water Act discharge permit · NPDES IL0034983
DECATUR SOUTH WATER TREATMENT PLANT, Decatur, IL: NPDES IL0034983 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
DECATUR SOUTH WATER TREATMENT PLANT, held by DECATUR, CITY OF, holds NPDES permit IL0034983, which discharges to Sangamon River. EPA’s file records it issued December 1, 2017 and expiring November 30, 2022. 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 | DECATUR SOUTH WATER TREATMENT PLANT |
|---|---|
| Permittee as filed | DECATUR, CITY OF |
| NPDES ID | IL0034983 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 1, 2017 |
| Expiration date | November 30, 2022 |
| Address | Decatur, IL 62521 |
| Receiving water | SANGAMON RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Big Creek-Long Creek (HUC 071300060409) |
| SIC | 4941 – Water Supply |
| Other EPA IDs (FRS) | RCRA handler ILR000140590 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 4Pollutants on file
- 4Under a numeric limit
- 2With a violation of any kind
- 2With 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 | 8 | 4 | 4 | January 31, 2014 | |
| Solids, total suspended | 8 | 2 | 2 | June 30, 2006 | 620% over the limit |
| Flow, in conduit or thru treatment plant | 8 | 0 | 0 | ||
| Chlorine, total residual | 4 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IL0034983.
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, IL0034983.
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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 IL0034983 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.