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Holcim (US) Incorporated

Crushed And Broken Limestone, Dundee, Michigan. NPDES permit MI0002020 expired Oct 1, 2024; its limits still apply. Last 12 months: over a limit once (last April 2026), 3 required values missing, 2 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: outfall 001 form A monthly (27 values), outfall 002 form A monthly (27 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 2 required values missing, 1 of 24 reports late

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

Period endingParameterReportedLimitOver by
April 2026Sulfide, dissolved, [as S], daily maximum67≤ 40 ug/L68%

Limits in force (66)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
Conductivitydaily maximumreport only (umho/cm)all year001
Hydrogen peroxidemonthly average< 50 ug/Lall year001
Hydrogen peroxidedaily maximum= 180 ug/Lall year001
Oxygen, dissolved [DO]daily minimum≥ 3 mg/Lall year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 20 mg/Lall year001
Solids, total suspendeddaily maximum≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 920 lb/dall year001
Solids, total suspendeddaily maximum≤ 1400 lb/dall year001
Sulfide, dissolved, [as S]monthly average< 20 ug/LJan, Feb, Mar, Dec001
Sulfide, dissolved, [as S]monthly average< 20 ug/LMay–Sep001
Sulfide, dissolved, [as S]monthly average< 20 ug/LApr001
Sulfide, dissolved, [as S]monthly average< 20 ug/LOct, Nov001
Sulfide, dissolved, [as S]daily maximum≤ 36 ug/LJan, Feb, Mar, Dec001
Sulfide, dissolved, [as S]daily maximum≤ 48 ug/LMay–Sep001
Sulfide, dissolved, [as S]daily maximum≤ 40 ug/LApr001
Sulfide, dissolved, [as S]daily maximum≤ 39 ug/LOct, Nov001
Chloride [as Cl]daily maximumreport only (mg/L)all year001
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year001
Strontium, total [as Sr]daily maximumreport only (ug/L)all year001
Selenium, total [as Se]daily maximumreport only (ug/L)all year001
Toxicity, choice of speciesmonthly averagereport only (tox chronic)all year001
Toxicity, choice of speciesvaluereport only (tox chronic)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
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (tox acute)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year001
TU Static 24 Hr Acute Pimephales promelasdaily maximumreport only (tox acute)all year001
Static 48 Hr Chronic Pimphales Promelasmonthly averagereport only (tox chronic)all year001
Static 48 Hr Chronic Pimphales Promelasvaluereport only (tox chronic)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year002
Conductivitydaily maximumreport only (umho/cm)all year002
Hydrogen peroxidemonthly average< 50 ug/Lall year002
Hydrogen peroxidedaily maximum= 180 ug/Lall year002
Oxygen, dissolved [DO]daily minimum≥ 3 mg/Lall year002
pHdaily minimum≥ 6.5 SUall year002
pHdaily maximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 20 mg/Lall year002
Solids, total suspendeddaily maximum≤ 30 mg/Lall year002
Solids, total suspendedmonthly average≤ 920 lb/dall year002
Solids, total suspendeddaily maximum≤ 1400 lb/dall year002
Sulfide, dissolved, [as S]monthly average< 20 ug/LOct, Nov002
Sulfide, dissolved, [as S]monthly average< 20 ug/LJan, Feb, Mar, Dec002
Sulfide, dissolved, [as S]monthly average< 20 ug/LMay–Sep002
Sulfide, dissolved, [as S]monthly average< 20 ug/LApr002
Sulfide, dissolved, [as S]daily maximum≤ 39 ug/LOct, Nov002
Sulfide, dissolved, [as S]daily maximum≤ 36 ug/LJan, Feb, Mar, Dec002
Sulfide, dissolved, [as S]daily maximum≤ 48 ug/LMay–Sep002
Sulfide, dissolved, [as S]daily maximum≤ 40 ug/LApr002
Chloride [as Cl]daily maximumreport only (mg/L)all year002
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year002
Strontium, total [as Sr]daily maximumreport only (ug/L)all year002
Selenium, total [as Se]daily maximumreport only (ug/L)all year002
Toxicity, choice of speciesmonthly averagereport only (tox chronic)all year002
Toxicity, choice of speciesvaluereport only (tox chronic)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (tox acute)all year002
Solids, total dissolveddaily maximumreport only (mg/L)all year002
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year002
TU Static 24 Hr Acute Pimephales promelasdaily maximumreport only (tox acute)all year002
Static 48 Hr Chronic Pimphales Promelasmonthly averagereport only (tox chronic)all year002
Static 48 Hr Chronic Pimphales Promelasvaluereport only (tox chronic)all year002

How strict are these limits?

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

Same industry: the 17 Mining and Quarrying of Nonmetallic Minerals permits in Michigan.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MI0002020 · MCP: https://passage-data.com/mcp