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Sewerage Systems, Bloomington, Illinois. NPDES permit IL0074551, in force until Apr 30, 2029. Last 12 months: over a limit once (last May 2026), 6 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| May 2026 | Coliform, fecal general, daily maximum | T | ≤ 400 #/100mL |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | monthly average minimum | ≥ 5.5 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | 001 |
| Oxygen, dissolved [DO] | minimum weekly average | ≥ 4 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | 001 |
| Oxygen, dissolved [DO] | minimum weekly average | ≥ 6 mg/L | Mar–Jul | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 3.5 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Mar–Jul | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 12 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 24 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1.6 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 3.2 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | Mar, Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.2 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.8 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.2 mg/L | Mar, Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.2 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.8 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .2 lb/d | Mar, Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .16 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .37 lb/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .69 lb/d | Mar, Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .83 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .64 lb/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 3 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 3.8 mg/L | Mar, Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ .4 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ .51 lb/d | Mar, Apr, May, Sep, Oct | 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 | all year | 001 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 20 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1.3 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 2.7 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/IL0074551 · MCP: https://passage-data.com/mcp