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Grand Tower Energy Center LLC

Electric Services, major discharger, Grand Tower, Illinois. NPDES permit IL0000124, in force until Dec 31, 2030. Last 12 months: no values over a limit, 3 of 44 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form 0 monthly (8 values), outfall 003 form 0 monthly (2 values), outfall A03 form 0 monthly (14 values), outfall 001 form S twice a year
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 62 reports late

Limits in force (46)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximum≤ 30 mg/Lall year001
Oil & Grease30-day average≤ 15 mg/Lall year001
Oil & Greasedaily maximumreport only (mg/L)all year001
Oil & Greasedaily maximum≤ 20 mg/Lall year001
Cyanide, total [as CN]daily maximumreport only (ug/L)all year001
Cyanide, free [amenable to chlorination]daily maximumreport only (ug/L)all year001
Chloride [as Cl]daily maximumreport only (mg/L)all year001
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year001
Fluoride, total [as F]daily maximumreport only (mg/L)all year001
Arsenic, total [as As]daily maximumreport only (mg/L)all year001
Barium, total [as Ba]daily maximumreport only (mg/L)all year001
Boron, total [as B]daily maximumreport only (mg/L)all year001
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year001
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year001
Chromium, total [as Cr]daily maximumreport only (mg/L)all year001
Copper, total [as Cu]daily maximumreport only (mg/L)all year001
Iron, total [as Fe]daily maximumreport only (mg/L)all year001
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year001
Lead, total [as Pb]daily maximumreport only (mg/L)all year001
Manganese, total [as Mn]daily maximumreport only (mg/L)all year001
Nickel, total [as Ni]daily maximumreport only (mg/L)all year001
Silver, total [as Ag]daily maximumreport only (mg/L)all year001
Zinc, total [as Zn]daily maximumreport only (mg/L)all year001
Selenium, total [as Se]daily maximumreport only (mg/L)all year001
Phenolics, total recoverabledaily maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall yearA03
BOD, 5-day, 20 deg. Cdaily maximum≤ 60 mg/Lall yearA03
BOD, 5-day, 20 deg. C30-day average≤ 1.25 lb/dall yearA03
BOD, 5-day, 20 deg. Cdaily maximum≤ 2.5 lb/dall yearA03
pHmonthly minimum≥ 6 SUall yearA03
pHmonthly maximum≤ 9 SUall yearA03
Solids, total suspended30-day average≤ 30 mg/Lall yearA03
Solids, total suspendeddaily maximum≤ 60 mg/Lall yearA03
Solids, total suspended30-day average≤ 1.25 lb/dall yearA03
Solids, total suspendeddaily maximum≤ 2.5 lb/dall yearA03
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearA03
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearA03
Chlorine, total residualdaily maximum≤ .75 mg/Lall yearA03
Coliform, fecal generaldaily maximum≤ 400 #/100mLMay–OctA03

How strict are these limits?

Cited limits by parameter: Illinois's rules and the federal ones.

Same industry: the 45 Electric Services 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/IL0000124 · MCP: https://passage-data.com/mcp