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Sewage treatment plant, Zeigler, Illinois. NPDES permit IL0023299, in force until Sep 30, 2028. Last 12 months: over a limit 17 times (last August 2026), 2 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Solids, total suspended, monthly average | 140 mg/L | ≤ 37 mg/L | 278% |
| October 2025 | Solids, total suspended, weekly average | 140 mg/L | ≤ 45 mg/L | 211% |
| December 2025 | BOD, carbonaceous [5 day, 20 C], monthly average | 275 lb/d | ≤ 232 lb/d | 19% |
| December 2025 | BOD, carbonaceous [5 day, 20 C], monthly average | 33 mg/L | ≤ 25 mg/L | 32% |
| January 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 46 mg/L | ≤ 25 mg/L | 84% |
| January 2026 | BOD, carbonaceous [5 day, 20 C], weekly average | 46 mg/L | ≤ 40 mg/L | 15% |
| January 2026 | Solids, total suspended, monthly average | 50 mg/L | ≤ 37 mg/L | 35% |
| January 2026 | Solids, total suspended, weekly average | 50 mg/L | ≤ 45 mg/L | 11% |
| February 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 27 mg/L | ≤ 25 mg/L | 8% |
| March 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 37 mg/L | ≤ 25 mg/L | 48% |
| April 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 36 mg/L | ≤ 25 mg/L | 44% |
| May 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 28 mg/L | ≤ 25 mg/L | 12% |
| May 2026 | Solids, total suspended, monthly average | 67 mg/L | ≤ 37 mg/L | 81% |
| May 2026 | Solids, total suspended, weekly average | 67 mg/L | ≤ 45 mg/L | 49% |
| June 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 31 mg/L | ≤ 25 mg/L | 24% |
| June 2026 | Coliform, fecal general, daily maximum | 1880 #/100mL | ≤ 400 #/100mL | 370% |
| August 2026 | Coliform, fecal general, daily maximum | 1400 #/100mL | ≤ 400 #/100mL | 250% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 37 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 344 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 418 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .05 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Chlorine, total residual | daily maximum | ≤ .05 mg/L | May–Oct | 001 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 232 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 372 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | INF |
| Solids, total suspended | monthly average | report only (mg/L) | all year | INF |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | INF |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | INF |
Cited limits by parameter: Illinois's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/IL0023299 · MCP: https://passage-data.com/mcp