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Crushed And Broken Limestone, major discharger, Newport, Michigan. NPDES permit MI0051195 expired Oct 1, 2018; its limits still apply. Last 12 months: over a limit 12 times (last September 2026), 55 required values missing, 4 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Hydrogen sulfide, daily maximum | < 49.9 | ≤ 6.4 ug/L | 680% |
| November 2025 | Hydrogen sulfide, daily maximum | < 18.5 | ≤ 6.4 ug/L | 189% |
| December 2025 | Hydrogen sulfide, daily maximum | < 16 | ≤ 6.4 ug/L | 150% |
| January 2026 | Hydrogen sulfide, daily maximum | < 24 | ≤ 6.4 ug/L | 275% |
| February 2026 | Hydrogen sulfide, daily maximum | < 27 | ≤ 6.4 ug/L | 322% |
| March 2026 | Hydrogen sulfide, daily maximum | < 16 | ≤ 6.4 ug/L | 150% |
| April 2026 | Hydrogen sulfide, daily maximum | < 17 | ≤ 6.4 ug/L | 166% |
| May 2026 | Hydrogen sulfide, daily maximum | < 11.4 | ≤ 6.4 ug/L | 78% |
| June 2026 | Hydrogen sulfide, daily maximum | < 16 | ≤ 6.4 ug/L | 150% |
| July 2026 | Hydrogen sulfide, daily maximum | < 16.4 | ≤ 6.4 ug/L | 156% |
| August 2026 | Hydrogen sulfide, daily maximum | < 17 | ≤ 6.4 ug/L | 166% |
| September 2026 | Hydrogen sulfide, daily maximum | < 18.9 | ≤ 6.4 ug/L | 195% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Conductivity | daily maximum | report only (umho/cm) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 3 mg/L | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1000 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 1500 lb/d | all year | 001 |
| Sulfide, dissolved, [as S] | daily maximum | < 50 ug/L | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 001 |
| Strontium, total [as Sr] | monthly average | ≤ 21000 ug/L | all year | 001 |
| Strontium, total [as Sr] | daily maximum | ≤ 81000 ug/L | all year | 001 |
| Strontium, total [as Sr] | monthly average | ≤ 1050 lb/d | all year | 001 |
| Strontium, total [as Sr] | daily maximum | ≤ 4050 lb/d | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Hydrogen sulfide | monthly average | ≤ .36 ug/L | all year | 001 |
| Hydrogen sulfide | daily maximum | ≤ 6.4 ug/L | all year | 001 |
| Hydrogen sulfide | monthly average | ≤ .018 lb/d | all year | 001 |
| Hydrogen sulfide | daily maximum | ≤ .32 lb/d | all year | 001 |
| Sulfate | daily maximum | report only (mg/L) | all year | 001 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 001 |
| TU Static 24 Hr Acute Pimephales promelas | daily maximum | report only (tox acute) | all year | 001 |
| Static 48 Hr Chronic Pimphales Promelas | monthly average | report only (tox chronic) | all year | 001 |
| Static 48 Hr Chronic Pimphales Promelas | daily maximum | report only (tox chronic) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| Conductivity | daily maximum | report only (umho/cm) | all year | 002 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 25 mg/L | all year | 002 |
| Sulfide, dissolved, [as S] | daily maximum | < 50 ug/L | all year | 002 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 002 |
| Hydrogen sulfide | daily maximum | report only (ug/L) | all year | 002 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 002 |
| TU Static 24 Hr Acute Pimephales promelas | daily maximum | report only (tox acute) | all year | 002 |
| Static 48 Hr Chronic Pimphales Promelas | monthly average | report only (tox chronic) | all year | 002 |
| Static 48 Hr Chronic Pimphales Promelas | daily maximum | report only (tox chronic) | all year | 002 |
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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