NPDES IL0051489 · Clean Water Act
DIAMOND STP, VILLAGE OF, Diamond, IL: NPDES IL0051489 discharge permit, effluent exceedances, inspections, penalties
DIAMOND STP, VILLAGE OF, Diamond, Illinois: Individual permit IL0051489, held by DIAMOND, VILLAGE OF; Publicly owned treatment works; Administratively continued; issued September 27, 2017, term to September 30, 2022; discharges to CLAYPOOL DRAINAGE DITCH.
- Nitrogen, ammonia total [as N]: 16 limits, 91 violations of any kind, 63 effluent exceedances, latest April 30, 2025, largest 1,094% over the limit.
- Solids, total suspended: 5 limits, 154 violations of any kind, 43 effluent exceedances, latest July 31, 2026, largest 333% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 4 limits, 95 violations of any kind, 3 effluent exceedances, latest May 31, 2026, largest 160% over the limit.
- pH: 2 limits, 49 violations of any kind, 1 effluent exceedance, latest January 31, 2023.
- Flow, in conduit or thru treatment plant: 4 limits, 92 violations of any kind.
- BOD, 5-day, 20 deg. C: 1 limit, 23 violations of any kind.
- Chlorine, total residual: 1 limit, 10 violations of any kind.
- Oxygen, dissolved [DO]: 5 limits, 9 violations of any kind.
- Phosphorus, total [as P]: 0 limits, 6 violations of any kind.
- Coliform, fecal general: 1 limit, 3 violations of any kind.
- Arsenic, dry weight: 0 limits, 3 violations of any kind.
- Selenium, dry weight: 0 limits, 3 violations of any kind.
- Copper, dry weight: 0 limits, 3 violations of any kind.
- Cadmium, dry weight: 0 limits, 3 violations of any kind.
- Zinc, sludge, total, dry weight [as Zn]: 0 limits, 3 violations of any kind.
- Lead, sludge, total, dry weight [as Pb]: 0 limits, 3 violations of any kind.
- Nickel, sludge, total, dry weight [as Ni]: 0 limits, 3 violations of any kind.
- Mercury, sludge, total, dry weight [as Hg]: 0 limits, 3 violations of any kind.
- Molybdenum, sludge, total, dry weight [as Mo]: 0 limits, 2 violations of any kind.
- Ann. amt sludge disposed by other method: 0 limits, 1 violation of any kind.
- Annual amt of sludge incinerated: 0 limits, 1 violation of any kind.
- Annual sludge production, total: 0 limits, 1 violation of any kind.
- Annual amount of sludge land applied: 0 limits, 1 violation of any kind.
- Annual amt. sludge disposed surface unit: 0 limits, 1 violation of any kind.
- Annual amt sludge disposed in landfill: 0 limits, 1 violation of any kind.
- Annual amt sludge transported interstate: 0 limits, 1 violation of any kind.
- Pollutant table from 503.13: 0 limits, 1 violation of any kind.
- Level of pathogen requirements achieved: 0 limits, 1 violation of any kind.
- Description of pathogen option used: 0 limits, 1 violation of any kind.
- Vector attraction reduction alternative used: 0 limits, 1 violation of any kind.
- January 30, 2026: Evaluation (S).
- January 30, 2026: Evaluation (S).
Illinois holds 544 Publicly owned treatment works coverages of this permit type in EPA’s file; 284 were issued before IL0051489.
Coverages issued nearest IL0051489
- 2017-09-22: ATHENS STP, CITY OF, Athens: IL0041203, held by ATHENS, CITY OF
- 2017-09-26: CAVE IN ROCK STP, VILLAGE OF, Cave-In-Rock: IL0055581, held by CAVE IN ROCK, VILLAGE OF
- 2017-09-26: GREEN VALLEY STP, Green Valley: IL0058998, held by GREEN VALLEY, VILLAGE OF
- 2017-09-27: FREEBURG EAST STP, VILLAGE OF, Freeburg: IL0020753, held by FREEBURG, VILLAGE OF
- 2017-09-27: ST. CHARLES WESTSIDE WWTF, CITY OF, Saint Charles: IL0026808, held by ST CHARLES , CITY OF
- 2017-09-27: GILBERTS WWTP, VILLAGE OF, Gilberts: IL0068764, held by GILBERTS, VILLAGE OF
- 2017-09-28: CARROLLTON STP, CITY OF, Carrollton: IL0021679, held by CARROLLTON, CITY OF
- 2017-09-29: LEROY STP, CITY OF, Leroy, Township Of: IL0021563, held by LEROY, CITY OF
- 2017-09-29: NORTH UTICA STP, VILLAGE OF, North Utica: IL0023116, held by NORTH UTICA, VILLAGE OF
- 2017-09-29: SALEM STP, CITY OF, Salem: IL0023264, held by SALEM, CITY OF
DIAMOND STP, VILLAGE OF among its neighbors
30 discharge permits are in the Claypool Ditch subwatershed (HUC 071200050502); IL0051489 is one. Its county: 70, 4 major; IL0051489 is minor permit.
Other permits in the Claypool Ditch subwatershed (HUC 071200050502)
- 988 N DIVISION, Braidwood: ILR10ZDGT, minor, term to 2028-08-31
- AUTOZONE STORE #10644, Diamond: ILR10ZGJ8, minor, term to 2028-08-31
- BRAIDWOOD COMMERCIAL SUB, Braidwood: ILR10ZDIO, minor, term to 2028-08-31
- BRAIDWOOD SELF STORAGE, Braidwood: ILR10ZGTS, minor, term to 2028-08-31
- BRAIDWOOD STP, CITY OF, Braidwood: ILL054992, minor, term to 2025-12-31
- CAMPING WORLD BRAIDWOOD, Braidwood: ILR10ZGCX, minor, term to 2028-08-31
- CARBON HILL STP, Carbon Hill: IL0080088, minor, term to 2026-08-31
- CASEY'S DIAMOND, IL, Diamond: ILR10ZGI9, minor, term to 2028-08-31
- COAL CITY STP, VILLAGE OF, Coal City: IL0028151, minor, term to 2022-06-30
- COMED TSS 149 WILMINGTON SUBSTATION EXPANSION PROJECT, Wilmington: ILR10ZGLF, minor, term to 2028-08-31
Identity
| Facility | DIAMOND STP, VILLAGE OF |
|---|---|
| Permittee | DIAMOND, VILLAGE OF |
| NPDES ID | IL0051489 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Minor |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 27, 2017 |
| Expires | September 30, 2022 |
| Address | Diamond, IL 60416 |
| Receiving water | CLAYPOOL DRAINAGE DITCH |
| Subwatershed | Claypool Ditch (HUC 071200050502) |
| Program components on file | Biosolids, POTW |
| SIC | 4952 – Sewerage Systems |
NPDES IL0051489: effluent limits and exceedances
DIAMOND STP, VILLAGE OF (NPDES IL0051489): 30 pollutants on file, 9 limited; 30 with a violation of any kind, 4 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 16 | 91 | 63 | April 30, 2025 | 1,094% over the limit |
| Solids, total suspended | 5 | 154 | 43 | July 31, 2026 | 333% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 95 | 3 | May 31, 2026 | 160% over the limit |
| pH | 2 | 49 | 1 | January 31, 2023 | |
| Flow, in conduit or thru treatment plant | 4 | 92 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 23 | 0 | ||
| Chlorine, total residual | 1 | 10 | 0 | ||
| Oxygen, dissolved [DO] | 5 | 9 | 0 | ||
| Phosphorus, total [as P] | 0 | 6 | 0 | ||
| Coliform, fecal general | 1 | 3 | 0 | ||
| Arsenic, dry weight | 0 | 3 | 0 | ||
| Selenium, dry weight | 0 | 3 | 0 | ||
| Copper, dry weight | 0 | 3 | 0 | ||
| Cadmium, dry weight | 0 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 0 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 0 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 0 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 0 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 0 | 2 | 0 | ||
| Ann. amt sludge disposed by other method | 0 | 1 | 0 | ||
| Annual amt of sludge incinerated | 0 | 1 | 0 | ||
| Annual sludge production, total | 0 | 1 | 0 | ||
| Annual amount of sludge land applied | 0 | 1 | 0 | ||
| Annual amt. sludge disposed surface unit | 0 | 1 | 0 | ||
| Annual amt sludge disposed in landfill | 0 | 1 | 0 | ||
| Annual amt sludge transported interstate | 0 | 1 | 0 | ||
| Pollutant table from 503.13 | 0 | 1 | 0 | ||
| Level of pathogen requirements achieved | 0 | 1 | 0 | ||
| Description of pathogen option used | 0 | 1 | 0 | ||
| Vector attraction reduction alternative used | 0 | 1 | 0 |
NPDES IL0051489: inspections, violations and enforcement
NPDES IL0051489: 2 inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| January 30, 2026 | Evaluation | S |
| January 30, 2026 | Evaluation | S |
NPDES IL0051489 (DIAMOND STP, VILLAGE OF): no single-event violation, formal enforcement action and informal enforcement action on file.
Watch NPDES IL0051489
NPDES IL0051489: one email when its EPA record changes — $99/month.
Permits near NPDES IL0051489
NPDES IL0051489: 30 pollutant rows, 2 dated events; ICIS-NPDES download, loaded October 14, 2026.