Passage Data · Check a report · Use it from your AI
Sewage treatment plant, major discharger, Pontiac, Illinois. NPDES permit IL0030457, in force until Dec 31, 2026. Last 12 months: over a limit 11 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Nitrite + Nitrate total [as N], monthly average | 25.33 mg/L | ≤ 10 mg/L | 153% |
| November 2025 | Nitrite + Nitrate total [as N], monthly average | 30.3 mg/L | ≤ 10 mg/L | 203% |
| December 2025 | Nitrite + Nitrate total [as N], monthly average | 23.44 mg/L | ≤ 10 mg/L | 134% |
| January 2026 | Nitrite + Nitrate total [as N], monthly average | 26.9 mg/L | ≤ 10 mg/L | 169% |
| February 2026 | Nitrite + Nitrate total [as N], monthly average | 32.35 mg/L | ≤ 10 mg/L | 224% |
| March 2026 | Nitrite + Nitrate total [as N], monthly average | 24.1 mg/L | ≤ 10 mg/L | 141% |
| April 2026 | Nitrite + Nitrate total [as N], monthly average | 14.83 mg/L | ≤ 10 mg/L | 48% |
| May 2026 | Nitrite + Nitrate total [as N], monthly average | 17.38 mg/L | ≤ 10 mg/L | 74% |
| June 2026 | Nitrite + Nitrate total [as N], monthly average | 16.1 mg/L | ≤ 10 mg/L | 61% |
| July 2026 | Nitrite + Nitrate total [as N], monthly average | 20.95 mg/L | ≤ 10 mg/L | 110% |
| August 2026 | Nitrite + Nitrate total [as N], monthly average | 19.2 mg/L | ≤ 10 mg/L | 92% |
| 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 | ≤ 851 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 1701 lb/d | all year | 001 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 001 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .8 mg/L | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.4 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .7 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.4 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.8 mg/L | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.8 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.7 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.2 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 57 lb/d | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 99 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 50 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 170 lb/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 198 lb/d | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 198 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 191 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 227 lb/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 1.8 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 128 lb/d | Jun–Aug | 001 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 10 mg/L | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 709 lb/d | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 001 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 001 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 001 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 001 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 001 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 001 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Phenolics, total recoverable | 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 | ≤ .038 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Chlorine, total residual | daily maximum | ≤ .038 mg/L | May–Oct | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 001 |
| Coliform, fecal general | daily maximum | ≤ 400 #/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 | ≤ 709 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 1418 lb/d | all year | 001 |
| Overflows | monthly total | report only (#/mo) | all year | 002 |
| Overflows | monthly total | report only (#/mo) | all year | 003 |
| Overflows | monthly total | report only (#/mo) | all year | 004 |
| Overflows | monthly total | report only (#/mo) | all year | 005 |
| Overflows | monthly total | report only (#/mo) | all year | A02 |
| 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.
· Save this facility as a site · Superfund sites nearby · Your permits on one board
On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/IL0030457 · MCP: https://passage-data.com/mcp