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Water Supply, Petersburg, Illinois. NPDES permit IL0077691, in force until Mar 31, 2031. Last 12 months: over a limit 3 times (last February 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Chlorine, total residual, daily maximum | .13 mg/L | ≤ .05 mg/L | 160% |
| January 2026 | Chlorine, total residual, daily maximum | .13 mg/L | ≤ .05 mg/L | 160% |
| February 2026 | Chlorine, total residual, daily maximum | .08 mg/L | ≤ .05 mg/L | 60% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 63 deg F | Jan, Feb, Mar, Dec |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 93 deg F | Apr–Nov |
| BOD, 5-day, 20 deg. C | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| pH | monthly minimum | ≥ 6 SU | all year |
| pH | monthly maximum | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 15 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year |
| Iron, total [as Fe] | 30-day average | ≤ 2 mg/L | all year |
| Iron, total [as Fe] | daily maximum | ≤ 4 mg/L | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | daily maximum | ≤ .05 mg/L | all year |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year |
Cited limits by parameter: Illinois's rules and the federal ones.
Same industry: the 30 Water Supply permits in Illinois.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/IL0077691 · MCP: https://passage-data.com/mcp