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Crushed And Broken Limestone, major discharger, Trenton, Michigan. NPDES permit MI0001953, in force until Oct 1, 2027. Last 12 months: no values over a limit, 4 required values missing, 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year |
| Conductivity | daily maximum | report only (umho/cm) | all year |
| Hydrogen peroxide | daily maximum | report only (ug/L) | all year |
| pH | daily minimum | ≥ 6.5 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 960 lb/d | all year |
| Solids, total suspended | daily maximum | ≤ 1400 lb/d | all year |
| Sulfide, dissolved, [as S] | daily maximum | report only (ug/L) | all year |
| Sulfide, dissolved, [as S] | daily maximum | report only (lb/d) | all year |
| Chloride [as Cl] | daily maximum | report only (ug/L) | all year |
| Sulfate, total [as SO4] | daily maximum | report only (ug/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 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | all year |
| Mercury, total [as Hg] | monthly average | report only (ng/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year |
| Mercury, total [as Hg] | 12-month average | ≤ 4 ng/L | all year |
| Mercury, total [as Hg] | 12-month average | ≤ .00019 lb/d | all year |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Sulfide, dissolved, [as S], daily maximum | 19 lb/d (Oct, Nov) | new | — | — |
| Sulfide, dissolved, [as S], daily maximum | 400 ug/L (Oct, Nov) | new | — | — |
| Sulfide, dissolved, [as S], daily maximum | 370 ug/L (Jan, Feb, Mar, Dec) | new | — | — |
| Sulfide, dissolved, [as S], daily maximum | 18 lb/d (Jan, Feb, Mar, Dec) | new | — | — |
| Sulfide, dissolved, [as S], daily maximum | 20 lb/d (Apr) | new | — | — |
| Sulfide, dissolved, [as S], daily maximum | 410 ug/L (Apr) | new | — | — |
| Sulfide, dissolved, [as S], daily maximum | 23 lb/d (May–Sep) | new | — | — |
| Sulfide, dissolved, [as S], daily maximum | 490 ug/L (May–Sep) | new | — | — |
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/MI0001953 · MCP: https://passage-data.com/mcp