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Knight Hawk Coal LLC

Bituminous Coal And Lignite - Surface, Vergennes, Illinois. NPDES permit IL0072656 expired Feb 28, 2019; its limits still apply. Last 12 months: over a limit 2 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 006 form 1 quarterly (48 values), outfall 006 form 2 quarterly (8 values), outfall 006 form 3 quarterly (7 values), outfall 006 form 4 quarterly (48 values), outfall 007 form 1 quarterly (48 values), outfall 007 form 2 quarterly (8 values), and 6 more forms
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 96 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
June 2026006Solids, total suspended, 30-day average52 mg/L≤ 35 mg/L49%
June 2026007Sulfate, total [as SO4], daily maximum2046 mg/L≤ 2000 mg/L2%

Limits in force (279)

ParameterStatisticLimitMonthsOutfall
pHquarterly minimum≥ 6 SUall year006
pHminimum≥ 6.5 SUall year006
pHminimum≥ 6.5 SUall year006
pHminimum≥ 6.5 SUall year006
pHquarterly minimum≥ 6 SUall year006
pHminimum≥ 6.5 SUall year006
pHminimum≥ 6.5 SUall year006
pHminimum≥ 6.5 SUall year006
pHquarterly maximum≤ 9 SUall year006
pHmaximum≤ 9 SUall year006
pHmaximum≤ 9 SUall year006
pHmaximum≤ 9 SUall year006
pHquarterly maximum≤ 9 SUall year006
pHmaximum≤ 9 SUall year006
pHmaximum≤ 9 SUall year006
pHmaximum≤ 9 SUall year006
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year006
Solids, total suspended30-day average≤ 35 mg/Lall year006
Solids, total suspended30-day average≤ 35 mg/Lall year006
Solids, total suspended30-day average≤ 35 mg/Lall year006
Solids, total suspended30-day average≤ 35 mg/Lall year006
Solids, total suspended30-day average≤ 35 mg/Lall year006
Solids, total suspended30-day average≤ 35 mg/Lall year006
Solids, total suspendeddaily maximum≤ 70 mg/Lall year006
Solids, total suspendeddaily maximum≤ 70 mg/Lall year006
Solids, total suspendeddaily maximum≤ 70 mg/Lall year006
Solids, total suspendeddaily maximum≤ 70 mg/Lall year006
Solids, total suspendeddaily maximum≤ 70 mg/Lall year006
Solids, total suspendeddaily maximum≤ 70 mg/Lall year006
Solids, settleablequarterly maximum≤ .5 mL/Lall year006
Hardness, total [as CaCO3]quarterly maximumreport only (mg/L)all year006
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year006
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year006
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year006
Hardness, total [as CaCO3]quarterly maximumreport only (mg/L)all year006
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year006
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year006
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year006
Chloride [as Cl]quarterly maximum≤ 500 mg/Lall year006
Chloride [as Cl]daily maximum≤ 500 mg/Lall year006
Chloride [as Cl]daily maximum≤ 500 mg/Lall year006
Chloride [as Cl]daily maximum≤ 500 mg/Lall year006
Chloride [as Cl]quarterly maximum≤ 500 mg/Lall year006
Chloride [as Cl]daily maximum≤ 500 mg/Lall year006
Chloride [as Cl]daily maximum≤ 500 mg/Lall year006
Chloride [as Cl]daily maximum≤ 500 mg/Lall year006
Sulfate, total [as SO4]quarterly maximum≤ 2000 mg/Lall year006
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year006
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year006
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year006
Sulfate, total [as SO4]quarterly maximum≤ 2000 mg/Lall year006
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year006
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year006
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year006
Iron, total [as Fe]30-day average≤ 3.5 mg/Lall year006
Iron, total [as Fe]30-day average≤ 3.5 mg/Lall year006
Iron, total [as Fe]30-day average≤ 3.5 mg/Lall year006
Iron, total [as Fe]30-day average≤ 3.5 mg/Lall year006
Iron, total [as Fe]30-day average≤ 3.5 mg/Lall year006
Iron, total [as Fe]30-day average≤ 3.5 mg/Lall year006
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year006
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year006
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year006
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year006
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year006
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year006
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year006
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year006
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year006
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year006
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year006
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Mercury, total [as Hg]daily maximumreport only (ng/L)all year006
Mercury, total [as Hg]daily maximumreport only (ng/L)all year006
Mercury, total [as Hg]daily maximumreport only (ng/L)all year006
Mercury, total [as Hg]daily maximumreport only (ng/L)all year006
Mercury, total [as Hg]daily maximumreport only (ng/L)all year006
Mercury, total [as Hg]daily maximumreport only (ng/L)all year006
pHquarterly minimum≥ 6 SUall year007
pHminimum≥ 6.5 SUall year007
pHminimum≥ 6.5 SUall year007
pHminimum≥ 6.5 SUall year007
pHquarterly minimum≥ 6 SUall year007
pHminimum≥ 6.5 SUall year007
pHminimum≥ 6.5 SUall year007
pHminimum≥ 6.5 SUall year007
pHquarterly maximum≤ 9 SUall year007
pHmaximum≤ 9 SUall year007
pHmaximum≤ 9 SUall year007
pHmaximum≤ 9 SUall year007
pHquarterly maximum≤ 9 SUall year007
pHmaximum≤ 9 SUall year007
pHmaximum≤ 9 SUall year007
pHmaximum≤ 9 SUall year007
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year007
Solids, total suspended30-day average≤ 35 mg/Lall year007
Solids, total suspended30-day average≤ 35 mg/Lall year007
Solids, total suspended30-day average≤ 35 mg/Lall year007
Solids, total suspended30-day average≤ 35 mg/Lall year007
Solids, total suspended30-day average≤ 35 mg/Lall year007
Solids, total suspended30-day average≤ 35 mg/Lall year007
Solids, total suspendeddaily maximum≤ 70 mg/Lall year007
Solids, total suspendeddaily maximum≤ 70 mg/Lall year007
Solids, total suspendeddaily maximum≤ 70 mg/Lall year007
Solids, total suspendeddaily maximum≤ 70 mg/Lall year007
Solids, total suspendeddaily maximum≤ 70 mg/Lall year007
Solids, total suspendeddaily maximum≤ 70 mg/Lall year007
Solids, settleablequarterly maximum≤ .5 mL/Lall year007
Hardness, total [as CaCO3]quarterly maximumreport only (mg/L)all year007
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year007
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year007
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year007
Hardness, total [as CaCO3]quarterly maximumreport only (mg/L)all year007
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year007
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year007
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year007
Chloride [as Cl]quarterly maximum≤ 500 mg/Lall year007
Chloride [as Cl]daily maximum≤ 500 mg/Lall year007
Chloride [as Cl]daily maximum≤ 500 mg/Lall year007
Chloride [as Cl]daily maximum≤ 500 mg/Lall year007
Chloride [as Cl]quarterly maximum≤ 500 mg/Lall year007
Chloride [as Cl]daily maximum≤ 500 mg/Lall year007
Chloride [as Cl]daily maximum≤ 500 mg/Lall year007
Chloride [as Cl]daily maximum≤ 500 mg/Lall year007
Sulfate, total [as SO4]quarterly maximum≤ 2000 mg/Lall year007
Sulfate, total [as SO4]quarterly maximum≤ 2000 mg/Lall year007
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year007
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year007
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year007
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year007
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year007
Sulfate, total [as SO4]daily maximum≤ 2000 mg/Lall year007
Iron, total [as Fe]30-day average≤ 3 mg/Lall year007
Iron, total [as Fe]30-day average≤ 3 mg/Lall year007
Iron, total [as Fe]30-day average≤ 3 mg/Lall year007
Iron, total [as Fe]30-day average≤ 3 mg/Lall year007
Iron, total [as Fe]30-day average≤ 3 mg/Lall year007
Iron, total [as Fe]30-day average≤ 3 mg/Lall year007
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year007
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year007
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year007
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year007
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year007
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year007
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year007
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year007
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year007
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year007
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year007
Manganese, total [as Mn]30-day average≤ 2 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year007
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Mercury, total [as Hg]daily maximumreport only (ng/L)all year007
Mercury, total [as Hg]daily maximumreport only (ng/L)all year007
Mercury, total [as Hg]daily maximumreport only (ng/L)all year007
Mercury, total [as Hg]daily maximumreport only (ng/L)all year007
Mercury, total [as Hg]daily maximumreport only (ng/L)all year007
Mercury, total [as Hg]daily maximumreport only (ng/L)all year007
pHquarterly minimum≥ 6 SUall year008
pHminimum≥ 6.5 SUall year008
pHquarterly minimum≥ 6 SUall year008
pHminimum≥ 6.5 SUall year008
pHquarterly maximum≤ 9 SUall year008
pHmaximum≤ 9 SUall year008
pHquarterly maximum≤ 9 SUall year008
pHmaximum≤ 9 SUall year008
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year008
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year008
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year008
Acidity, total [as CaCO3]daily maximumreport only (mg/L)all year008
Solids, total suspended30-day average≤ 35 mg/Lall year008
Solids, total suspended30-day average≤ 35 mg/Lall year008
Solids, total suspendeddaily maximum≤ 70 mg/Lall year008
Solids, total suspendeddaily maximum≤ 70 mg/Lall year008
Solids, settleablequarterly maximum≤ .5 mL/Lall year008
Hardness, total [as CaCO3]quarterly maximumreport only (mg/L)all year008
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year008
Hardness, total [as CaCO3]quarterly maximumreport only (mg/L)all year008
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year008
Chloride [as Cl]quarterly maximum≤ 500 mg/Lall year008
Chloride [as Cl]daily maximum≤ 500 mg/Lall year008
Chloride [as Cl]quarterly maximum≤ 500 mg/Lall year008
Chloride [as Cl]daily maximum≤ 500 mg/Lall year008
Sulfate, total [as SO4]quarterly maximum≤ 1951 mg/Lall year008
Sulfate, total [as SO4]daily maximum≤ 1951 mg/Lall year008
Sulfate, total [as SO4]quarterly maximum≤ 1951 mg/Lall year008
Sulfate, total [as SO4]daily maximum≤ 1951 mg/Lall year008
Iron, total [as Fe]30-day average≤ 3 mg/Lall year008
Iron, total [as Fe]30-day average≤ 3 mg/Lall year008
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year008
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year008
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year008
Manganese, total [as Mn]daily maximum≤ 1 mg/Lall year008
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year008
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year008
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year008
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008
Mercury, total [as Hg]daily maximumreport only (ng/L)all year008
Mercury, total [as Hg]daily maximumreport only (ng/L)all year008

How strict are these limits?

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

Same industry: the 56 Coal Mining permits in Illinois.

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Your permit document is the final word. As JSON: /api/v1/permits/IL0072656 · MCP: https://passage-data.com/mcp