Clean Water Act discharge permit · NPDES IL0051489
DIAMOND STP, VILLAGE OF, Diamond, IL: NPDES IL0051489 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
DIAMOND STP, VILLAGE OF, held by DIAMOND, VILLAGE OF, holds NPDES permit IL0051489, which discharges to Claypool Drainage Ditch. EPA’s file records it issued September 27, 2017 and expiring September 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 | DIAMOND STP, VILLAGE OF |
|---|---|
| Permittee as filed | DIAMOND, VILLAGE OF |
| NPDES ID | IL0051489 |
| 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 | September 27, 2017 |
| Expiration date | 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 |
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
- 30Pollutants on file
- 9Under a numeric limit
- 30With a violation of any kind
- 4With 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 | 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 |
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 IL0051489.
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
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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 IL0051489 there.
Nearby on the register
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- Every permit record in Diamond, A to Z
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- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.