Clean Water Act discharge permit · NPDES IL0020907
ASSUMPTION STP, CITY OF, Assumption, IL: NPDES IL0020907 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
ASSUMPTION STP, CITY OF, held by ASSUMPTION, CITY OF, holds NPDES permit IL0020907, which discharges to Big George Branch. EPA’s file records it issued May 15, 2019 and expiring April 30, 2024. 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 | ASSUMPTION STP, CITY OF |
|---|---|
| Permittee as filed | ASSUMPTION, CITY OF |
| NPDES ID | IL0020907 |
| 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 | May 15, 2019 |
| Expiration date | April 30, 2024 |
| Address | Assumption, IL 62510 |
| Receiving water | BIG GEORGE BRANCH |
| Subwatershed | Big George Branch (HUC 071300070104) |
| Program components on file | Biosolids, POTW |
| 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
- 14Pollutants on file
- 10Under a numeric limit
- 14With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 5 | 135 | 66 | May 31, 2026 | 124% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 66 | 10 | May 31, 2013 | 32% over the limit |
| pH | 2 | 33 | 5 | October 31, 2015 | |
| Flow, in conduit or thru treatment plant | 4 | 56 | 0 | ||
| Oxygen, dissolved [DO] | 5 | 40 | 0 | ||
| Chlorine, total residual | 1 | 17 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 13 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 13 | 0 | ||
| Coliform, fecal general | 1 | 6 | 0 | ||
| Rainfall | 0 | 2 | 0 | ||
| Overflows | 1 | 1 | 0 | ||
| Rainfall duration | 0 | 1 | 0 | ||
| Duration | 0 | 1 | 0 | ||
| Rainfall events | 0 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IL0020907.
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, IL0020907.
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 IL0020907 there.
Nearby on the register
- Discharge permits in Assumption
- Every permit record in Assumption, A to Z
- Discharge permits in Illinois
- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.