Clean Water Act discharge permit · NPDES IL0020788
DANVILLE SANITARY DISTRICT STP, Danville, IL: NPDES IL0020788 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 12Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
DANVILLE SANITARY DISTRICT STP, held by DANVILLE SANITARY DISTRICT, holds NPDES permit IL0020788, which discharges to Vermilion River. EPA’s file records it issued September 28, 2015 and expiring September 30, 2020. 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 | DANVILLE SANITARY DISTRICT STP |
|---|---|
| Permittee as filed | DANVILLE SANITARY DISTRICT |
| NPDES ID | IL0020788 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 28, 2015 |
| Expiration date | September 30, 2020 |
| Address | Danville, IL 61834 |
| Receiving water | VERMILION RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lick Creek (HUC 051201090903) |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler ILD097314785 |
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
- 21Pollutants on file
- 12Under a numeric limit
- 17With 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] | 16 | 22 | 22 | November 30, 2025 | 457% over the limit |
| Oxygen, dissolved [DO] | 5 | 5 | 2 | May 31, 2012 | 100% over the limit |
| Coliform, fecal general | 4 | 4 | 1 | May 31, 2023 | 99,999% over the limit |
| Solids, total suspended | 8 | 13 | 0 | ||
| BOD, 5-day, 20 deg. C | 4 | 13 | 0 | ||
| Flow | 3 | 6 | 0 | ||
| Arsenic, total [as As] | 0 | 5 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 0 | 5 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 0 | 5 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 3 | 0 | ||
| Chlorine, total residual | 2 | 2 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 2 | 0 | ||
| Unit w/liner/leachate collection system | 0 | 2 | 0 | ||
| Unit boundary to property line distance | 0 | 2 | 0 | ||
| Level of pathogen requirements achieved | 0 | 2 | 0 | ||
| Description of pathogen option used | 0 | 2 | 0 | ||
| Vector attraction reduction alternative used | 0 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Nitrogen, total [as N] | 1 | 0 | 0 | ||
| Phosphorus, total [as P] | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 15, 2026 | Wet-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | ST6 |
| August 15, 2026 | Wet-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | ST6 |
| April 5, 2025 | Wet-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | 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, IL0020788.
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 IL0020788 there.
Nearby on the register
- Discharge permits in Danville
- Every permit record in Danville, 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.