Clean Water Act discharge permit · NPDES IL0021121
CREST HILL WEST STP, CITY OF, Crest Hill, IL: NPDES IL0021121 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 32Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
CREST HILL WEST STP, CITY OF, held by CREST HILL, CITY OF, holds NPDES permit IL0021121, which discharges to Rock Run Creek. EPA’s file records it issued September 24, 2015 and expiring September 30, 2020. 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 | CREST HILL WEST STP, CITY OF |
|---|---|
| Permittee as filed | CREST HILL, CITY OF |
| NPDES ID | IL0021121 |
| 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 24, 2015 |
| Expiration date | September 30, 2020 |
| Address | Crest Hill, IL 60403 |
| Receiving water | ROCK RUN CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Rock Run-Illinois and Michigan Canal (HUC 071200040809) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 43Pollutants on file
- 32Under a numeric limit
- 43With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 23 | 113 | 36 | January 31, 2025 | 975% over the limit |
| Solids, total suspended | 8 | 105 | 21 | January 31, 2025 | 577% over the limit |
| Oxygen, dissolved [DO] | 7 | 58 | 20 | June 30, 2024 | 68% over the limit |
| Coliform, fecal general | 2 | 36 | 18 | June 30, 2026 | 99,999% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 6 | 68 | 9 | January 31, 2025 | 196% over the limit |
| Copper, total [as Cu] | 2 | 18 | 5 | August 31, 2007 | 79% over the limit |
| Mercury, sludge, total, dry weight [as Hg] | 0 | 2 | 2 | December 31, 2011 | 248% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 30 | 1 | April 30, 2013 | 7% over the limit |
| Flow, in conduit or thru treatment plant | 6 | 54 | 0 | ||
| pH | 4 | 48 | 0 | ||
| Phosphorus, total [as P] | 1 | 36 | 0 | ||
| Nitrogen, total [as N] | 1 | 26 | 0 | ||
| Chlorine, total residual | 2 | 25 | 0 | ||
| Flow, total | 1 | 14 | 0 | ||
| Mercury, total [as Hg] | 2 | 6 | 0 | ||
| Oil & Grease | 2 | 5 | 0 | ||
| Cyanide, total [as CN] | 2 | 5 | 0 | ||
| Fluoride, total [as F] | 2 | 5 | 0 | ||
| Arsenic, total [as As] | 2 | 5 | 0 | ||
| Barium, total [as Ba] | 2 | 5 | 0 | ||
| Cadmium, total [as Cd] | 2 | 5 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 5 | 0 | ||
| Chromium, total [as Cr] | 2 | 5 | 0 | ||
| Iron, total [as Fe] | 2 | 5 | 0 | ||
| Iron, dissolved [as Fe] | 2 | 5 | 0 | ||
| Lead, total [as Pb] | 2 | 5 | 0 | ||
| Manganese, total [as Mn] | 2 | 5 | 0 | ||
| Nickel, total [as Ni] | 2 | 5 | 0 | ||
| Silver, total [as Ag] | 2 | 5 | 0 | ||
| Zinc, total [as Zn] | 2 | 5 | 0 | ||
| Selenium, total [as Se] | 2 | 5 | 0 | ||
| Phenolics, total recoverable | 2 | 5 | 0 | ||
| Cyanide, weak acid, dissociable | 2 | 4 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 4 | 0 | ||
| Alkalinity, total [as CaCO3] | 0 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 4 | 0 | ||
| Phosphorus, dissolved | 0 | 4 | 0 | ||
| Chloride [as Cl] | 0 | 4 | 0 | ||
| Nitrogen, Kjeldahl Total | 0 | 4 | 0 | ||
| Cyanide, free [amenable to chlorination] | 0 | 1 | 0 | ||
| Beryllium, total [as Be] | 0 | 1 | 0 | ||
| Thallium, total [as Tl] | 0 | 1 | 0 | ||
| Antimony, total [as Sb] | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 13, 2026 | Dry-weather SSO, no 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, IL0021121.
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 IL0021121 there.
Nearby on the register
- Discharge permits in Crest Hill
- Every permit record in Crest Hill, A to Z
- Discharge permits in Illinois
- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.