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Michigan Paving and Materials

Crushed And Broken Limestone, major discharger, Maybee, Michigan. NPDES permit MI0004821 expired Oct 1, 2018; its limits still apply. Last 12 months: over a limit 13 times (last August 2026), 40 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: form A monthly (22 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
8 values over a limit, 48 required values missing, 0 of 12 reports late

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

All 13 values over a limit
Period endingParameterReportedLimitOver by
November 2025Hydrogen sulfide, daily maximum< 12≤ 6.4 ug/L87%
November 2025Strontium, total [as Sr], monthly average21700≤ 21000 ug/L3%
December 2025Hydrogen sulfide, daily maximum19≤ 6.4 ug/L197%
January 2026Hydrogen sulfide, daily maximum19≤ 6.4 ug/L197%
February 2026Hydrogen sulfide, daily maximum48≤ 6.4 ug/L650%
February 2026Strontium, total [as Sr], monthly average21650≤ 21000 ug/L3%
March 2026Hydrogen sulfide, daily maximum14≤ 6.4 ug/L119%
April 2026Hydrogen sulfide, daily maximum< 11≤ 6.4 ug/L72%
May 2026Hydrogen sulfide, daily maximum< 9.6≤ 6.4 ug/L50%
June 2026Hydrogen sulfide, daily maximum< 8≤ 6.4 ug/L25%
June 2026Strontium, total [as Sr], monthly average21175≤ 21000 ug/L1%
July 2026Hydrogen sulfide, daily maximum< 9≤ 6.4 ug/L41%
August 2026Hydrogen sulfide, daily maximum< 10≤ 6.4 ug/L56%

Limits in force (39)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Conductivitymonthly averagereport only (umho/cm)all year
Conductivitydaily maximumreport only (umho/cm)all year
Hydrogen peroxidedaily maximumreport only (ug/L)all year
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 830 lb/dall year
Solids, total suspendeddaily maximum≤ 1300 lb/dall year
Sulfide, dissolved, [as S]monthly averagereport only (ug/L)all year
Sulfide, dissolved, [as S]daily maximumreport only (ug/L)all year
Sulfide, dissolved, [as S]monthly averagereport only (ug/L)all year
Sulfide, dissolved, [as S]daily maximumreport only (ug/L)all year
Chloride [as Cl]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Sulfate, total [as SO4]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Strontium, total [as Sr]monthly average≤ 21000 ug/Lall year
Strontium, total [as Sr]daily maximumreport only (ug/L)all year
Strontium, total [as Sr]monthly average≤ 880 lb/dall year
Strontium, total [as Sr]daily maximumreport only (lb/d)all year
Selenium, total [as Se]daily maximumreport only (ug/L)Jul
Selenium, total [as Se]daily maximumreport only (lb/d)Jul
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Solids, total dissolveddaily maximumreport only (mg/L)all year
Hydrogen sulfidemonthly average≤ .36 ug/Lall year
Hydrogen sulfidedaily maximum≤ 6.4 ug/Lall year
Hydrogen sulfidemonthly average≤ .015 lb/dall year
Hydrogen sulfidedaily maximum≤ .27 lb/dall year
Hydrogen sulfidemonthly average≤ .36 ug/Lall year
Hydrogen sulfidedaily maximum≤ 6.4 ug/Lall year
Hydrogen sulfidemonthly average≤ .015 lb/dall year
Hydrogen sulfidedaily maximum≤ .27 lb/dall year
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year
TU Static 24 Hr Acute Pimephales promelasdaily maximumreport only (tox acute)Jul
Static 48 Hr Chronic Pimphales Promelasmonthly average≤ 1 tox chronicJul
Static 48 Hr Chronic Pimphales Promelasdaily maximumreport only (tox chronic)Jul

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/MI0004821 · MCP: https://passage-data.com/mcp