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Sewage treatment plant, major discharger, Joliet, Illinois. NPDES permit IL0022519, in force until May 31, 2027. Last 12 months: over a limit 2 times (last July 2026), 8 of 97 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| July 2026 | Nitrogen, ammonia total [as N], daily maximum | 6.21 mg/L | ≤ 2.9 mg/L | 114% |
| July 2026 | Nitrogen, ammonia total [as N], monthly average | 1.57 mg/L | ≤ 1 mg/L | 57% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Overflows | monthly total | report only (#/mo) | all year | 004 |
| Overflows | monthly total | report only (#/mo) | all year | 007 |
| Overflows | monthly total | report only (#/mo) | all year | 009 |
| Overflows | monthly total | report only (#/mo) | all year | 011 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | A02 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | A02 |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | all year | A02 |
| pH | minimum | ≥ 6 SU | all year | A02 |
| pH | maximum | ≤ 9 SU | all year | A02 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | A02 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | A02 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | A02 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | A02 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | A02 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | A02 |
| Chlorine, total residual | monthly average | ≤ .75 mg/L | all year | A02 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year | A02 |
| Flow, total | monthly total | report only (MGD) | all year | A02 |
| Temperature, water deg. fahrenheit | monthly maximum | report only (deg F) | all year | B02 |
| Temperature, water deg. fahrenheit | monthly maximum | report only (deg F) | all year | B02 |
| Temperature, water deg. fahrenheit | monthly maximum | report only (deg F) | all year | B02 |
| Temperature, water deg. fahrenheit | monthly maximum | report only (deg F) | all year | B02 |
| Specific conductance | daily maximum | report only (uS/cm) | all year | B02 |
| Specific conductance | daily maximum | report only (uS/cm) | all year | B02 |
| Specific conductance | daily maximum | report only (uS/cm) | all year | B02 |
| Specific conductance | daily maximum | report only (uS/cm) | all year | B02 |
| Oxygen, dissolved [DO] | monthly average minimum | ≥ 5.5 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | B02 |
| Oxygen, dissolved [DO] | monthly average minimum | ≥ 5.5 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | B02 |
| Oxygen, dissolved [DO] | minimum weekly average | ≥ 6 mg/L | Mar–Jul | B02 |
| Oxygen, dissolved [DO] | minimum weekly average | ≥ 6 mg/L | Mar–Jul | B02 |
| Oxygen, dissolved [DO] | minimum weekly average | ≥ 4 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | B02 |
| Oxygen, dissolved [DO] | minimum weekly average | ≥ 4 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | B02 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Mar–Jul | B02 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Mar–Jul | B02 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 3.5 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | B02 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 3.5 mg/L | Jan, Feb, Aug, Sep, Oct, Nov, Dec | B02 |
| pH | minimum | ≥ 6 SU | all year | B02 |
| pH | minimum | ≥ 6 SU | all year | B02 |
| pH | maximum | ≤ 9 SU | all year | B02 |
| pH | maximum | ≤ 9 SU | all year | B02 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | B02 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | B02 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | B02 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | B02 |
| Solids, total suspended | monthly average | ≤ 12 mg/L | all year | B02 |
| Solids, total suspended | monthly average | ≤ 12 mg/L | all year | B02 |
| Solids, total suspended | daily maximum | ≤ 24 mg/L | all year | B02 |
| Solids, total suspended | daily maximum | ≤ 24 mg/L | all year | B02 |
| Solids, total suspended | monthly average | ≤ 4554 lb/d | all year | B02 |
| Solids, total suspended | monthly average | ≤ 4554 lb/d | all year | B02 |
| Solids, total suspended | daily maximum | ≤ 9107 lb/d | all year | B02 |
| Solids, total suspended | daily maximum | ≤ 9107 lb/d | all year | B02 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | B02 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | B02 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | B02 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.2 mg/L | Apr, May, Sep, Oct | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.2 mg/L | Apr, May, Sep, Oct | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Jun–Aug | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Jun–Aug | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.4 mg/L | Jan, Feb, Nov, Dec | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.4 mg/L | Jan, Feb, Nov, Dec | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | Mar | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | Mar | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.9 mg/L | Apr, May, Sep, Oct | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.9 mg/L | Apr, May, Sep, Oct | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.9 mg/L | Jun–Aug | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.9 mg/L | Jun–Aug | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.6 mg/L | Jan, Feb, Nov, Dec | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.6 mg/L | Jan, Feb, Nov, Dec | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.8 mg/L | Mar | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.8 mg/L | Mar | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 455 lb/d | Apr, May, Sep, Oct | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 455 lb/d | Apr, May, Sep, Oct | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 379 lb/d | Jun–Aug | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 379 lb/d | Jun–Aug | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 911 lb/d | Jan, Feb, Nov, Dec | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 911 lb/d | Jan, Feb, Nov, Dec | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 569 lb/d | Mar | B02 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 569 lb/d | Mar | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1100 lb/d | Apr, May, Sep, Oct | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1100 lb/d | Apr, May, Sep, Oct | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1100 lb/d | Jun–Aug | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1100 lb/d | Jun–Aug | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1746 lb/d | Jan, Feb, Nov, Dec | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1746 lb/d | Jan, Feb, Nov, Dec | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1442 lb/d | Mar | B02 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1442 lb/d | Mar | B02 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | B02 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | B02 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | B02 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | B02 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | B02 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | B02 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | B02 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | B02 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | B02 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | B02 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | B02 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | B02 |
| Phosphorus, total [as P] | monthly average | ≤ 379 lb/d | all year | B02 |
| Phosphorus, total [as P] | monthly average | ≤ 379 lb/d | all year | B02 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | B02 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | B02 |
| Phosphorus, dissolved | daily maximum | report only (mg/L) | all year | B02 |
| Phosphorus, dissolved | daily maximum | report only (mg/L) | all year | B02 |
| Phosphorus, dissolved | daily maximum | report only (mg/L) | all year | B02 |
| Phosphorus, dissolved | daily maximum | report only (mg/L) | all year | B02 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | B02 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | B02 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | B02 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | B02 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | B02 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | B02 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | B02 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | B02 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | B02 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | B02 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | B02 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | B02 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | B02 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | B02 |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | all year | B02 |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | all year | B02 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | B02 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | B02 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | B02 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | B02 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | B02 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | B02 |
| Copper, total [as Cu] | daily maximum | ≤ .0615 mg/L | all year | B02 |
| Copper, total [as Cu] | daily maximum | ≤ .0615 mg/L | all year | B02 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | B02 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | B02 |
| Copper, total [as Cu] | daily maximum | ≤ 23 lb/d | all year | B02 |
| Copper, total [as Cu] | daily maximum | ≤ 23 lb/d | all year | B02 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | B02 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | B02 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | B02 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | B02 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | B02 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | B02 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | B02 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | B02 |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | all year | B02 |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | all year | B02 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | B02 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | B02 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | B02 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | B02 |
| Zinc, total [as Zn] | daily maximum | ≤ .2291 mg/L | all year | B02 |
| Zinc, total [as Zn] | daily maximum | ≤ .2291 mg/L | all year | B02 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | B02 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | B02 |
| Zinc, total [as Zn] | daily maximum | ≤ 87 lb/d | all year | B02 |
| Zinc, total [as Zn] | daily maximum | ≤ 87 lb/d | all year | B02 |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | all year | B02 |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | all year | B02 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | B02 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | B02 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | B02 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | B02 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | B02 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | B02 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | B02 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | B02 |
| Chlorine, total residual | daily maximum | ≤ .038 mg/L | all year | B02 |
| Chlorine, total residual | daily maximum | ≤ .038 mg/L | all year | B02 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | B02 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | B02 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | May–Oct | B02 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | May–Oct | B02 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | B02 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | B02 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 20 mg/L | all year | B02 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 20 mg/L | all year | B02 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 3795 lb/d | all year | B02 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 3795 lb/d | all year | B02 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 7589 lb/d | all year | B02 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 7589 lb/d | all year | B02 |
| 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 |
| Phosphorus, total [as P] | daily maximum | 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 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | INFL |
| Oil & Grease | daily maximum | report only (mg/L) | all year | INFL |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | INFL |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | INFL |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | INFL |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | INFL |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | INFL |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | INFL |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | INFL |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | INFL |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | INFL |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | INFL |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | all year | INFL |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | all year | INFL |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | INFL |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | INFL |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | INFL |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | INFL |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | INFL |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | INFL |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | INFL |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | INFL |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | INFL |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | INFL |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | INFL |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | INFL |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | INFL |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | INFL |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | INFL |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | INFL |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | all year | INFL |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | all year | INFL |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | INFL |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | INFL |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | INFL |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | INFL |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | INFL |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | INFL |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | all year | INFL |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | all year | INFL |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | INFL |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | INFL |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | INFL |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | INFL |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | INFL |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | INFL |
Cited limits by parameter: Illinois's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/IL0022519 · MCP: https://passage-data.com/mcp