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Sewage treatment plant, Paxton, Illinois. NPDES permit IL0023205, in force until Nov 30, 2027. Last 12 months: no values over a limit, 2 of 77 reports late. Source: EPA ECHO, Oct 22, 2026.
| 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 | ≤ 142 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 284 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.6 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.3 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .9 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.2 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.3 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3 mg/L | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 19 lb/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 15 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 13 lb/d | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 11 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 lb/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 51 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 36 lb/d | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 36 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 2.3 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 3.3 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 27 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 39 lb/d | Mar | 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 | report only (#/100mL) | May–Oct | 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 | ≤ 118 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 237 lb/d | all year | 001 |
| Oxygen, dissolved [DO] | monthly average minimum | ≥ 5.5 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | 002 |
| Oxygen, dissolved [DO] | minimum weekly average | ≥ 6 mg/L | Mar–Jul | 002 |
| Oxygen, dissolved [DO] | minimum weekly average | ≥ 4 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | 002 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Mar–Jul | 002 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 3.5 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 12 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 24 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 142 lb/d | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 284 lb/d | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.3 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | Apr, May, Sep, Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .9 mg/L | Jun–Aug | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.6 mg/L | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.3 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3 mg/L | Apr, May, Sep, Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3 mg/L | Jun–Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.2 mg/L | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 15 lb/d | Mar | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 13 lb/d | Apr, May, Sep, Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 11 lb/d | Jun–Aug | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 19 lb/d | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 51 lb/d | Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 36 lb/d | Apr, May, Sep, Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 36 lb/d | Jun–Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 lb/d | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 3.3 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 2.3 mg/L | Jun–Aug | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 39 lb/d | Mar | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 27 lb/d | Jun–Aug | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .05 mg/L | all year | 002 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | May–Oct | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 20 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 118 lb/d | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 237 lb/d | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Chlorine, total residual | monthly average | ≤ .75 mg/L | all year | 003 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year | 003 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | A03 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | A03 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | all year | A03 |
| Flow | monthly total | report only (#/mo) | all year | A03 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | B03 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | B03 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | all year | B03 |
| Flow | monthly total | report only (#/mo) | all year | B03 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | C03 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | C03 |
| pH | minimum | ≥ 6 SU | all year | C03 |
| pH | maximum | ≤ 9 SU | all year | C03 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | C03 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | C03 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | C03 |
| Chlorine, total residual | monthly average | ≤ .75 mg/L | all year | C03 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year | C03 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | C03 |
| 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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