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Special Trade Contractors, Rockford, Michigan. NPDES permit MI0060323, in force until Oct 1, 2028. Last 12 months: over a limit 2 times (last November 2025), 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Chloride [as Cl], daily maximum | 290000 | ≤ 1200 lb/d | 24067% |
| November 2025 | Sulfate, total [as SO4], daily maximum | 160000 | ≤ 2200 lb/d | 7173% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year |
| Oxygen, dissolved [DO] | daily minimum | ≥ 7 mg/L | all year |
| pH | daily minimum | ≥ 6.5 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| pH | daily minimum | ≥ 6.5 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | ≤ 1.8 lb/d | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| Chloride [as Cl] | daily maximum | ≤ 640000 ug/L | all year |
| Chloride [as Cl] | daily maximum | ≤ 1200 lb/d | all year |
| Sulfate, total [as SO4] | daily maximum | ≤ 1200000 ug/L | all year |
| Sulfate, total [as SO4] | daily maximum | ≤ 2200 lb/d | all year |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year |
| Chromium, hexavalent [as Cr] | daily maximum | report only (ug/L) | all year |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year |
| Manganese, total [as Mn] | daily maximum | report only (ug/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year |
| Equipment inspection - visual | value | report only (N=0;Y=1) | 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 |
| Chlorine, total residual | daily maximum | ≤ 38 ug/L | all year |
| Perfluorooctanoic acid (PFOA) | daily maximum | ≤ 40 ng/L | all year |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year |
| Perfluorooctanesulfonate | monthly average | ≤ 12 ng/L | all year |
| Perfluorooctanesulfonate | daily maximum | ≤ 15 ng/L | all year |
| Perfluorooctanesulfonate | daily maximum | report only (ng/L) | all year |
| Perfluorooctanesulfonate | daily maximum | report only (ng/L) | all year |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (ng/L) | all year |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (ng/L) | all year |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (ng/L) | all year |
| Perfluorohexane Sulfonate | daily maximum | report only (ng/L) | all year |
| Perfluorohexane Sulfonate | daily maximum | report only (ng/L) | all year |
| Perfluorohexane Sulfonate | daily maximum | report only (ng/L) | all year |
| Perfluorobutanesulfonic acid (PFBS) | daily maximum | ≤ 250 ng/L | all year |
| Perfluorobutanesulfonic acid (PFBS) | daily maximum | report only (ng/L) | all year |
| Perfluorobutanesulfonic acid (PFBS) | daily maximum | report only (ng/L) | all year |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 tox acute | all year |
| Solids, total dissolved | daily maximum | report only (mg/L) | 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 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year |
| Toxic Units Static 24 Hr Acute Ceriodaphnia dubia | daily maximum | ≤ 1 tox acute | all year |
| TU Static 24 Hr Acute Daphnia magna | daily maximum | ≤ 1 tox acute | all year |
| TU Static 24 Hr Acute Pimephales promelas | daily maximum | ≤ 1 tox acute | all year |
Cited limits by parameter: Michigan's rules and the federal ones.
Same industry: the 11 Construction — Special Trade Contractors permits in Michigan.
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Your permit document is the final word. As JSON: /api/v1/permits/MI0060323 · MCP: https://passage-data.com/mcp