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Screw Machine Products, Lexington, Michigan. NPDES permit MI0002429, in force until Oct 1, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 40 mg/L | Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | report only (lb/d) | Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 10 lb/d | Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 17 lb/d | Mar, Apr, Nov, Dec | 001 |
| pH | daily minimum | ≥ 6.5 SU | Mar, Apr, Nov, Dec | 001 |
| pH | daily maximum | ≤ 10 SU | Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 70 mg/L | Mar, Apr | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Nov, Dec | 001 |
| Solids, total suspended | 7-day average | ≤ 100 mg/L | Mar, Apr | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Nov, Dec | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Apr | 001 |
| Solids, total suspended | monthly average | report only (lb/d) | Nov, Dec | 001 |
| Solids, total suspended | monthly average | report only (lb/d) | Mar, Apr | 001 |
| Solids, total suspended | 7-day average | report only (lb/d) | Nov, Dec | 001 |
| Solids, total suspended | 7-day average | report only (lb/d) | Mar, Apr | 001 |
| Solids, total suspended | monthly average | ≤ 13 lb/d | Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 29 lb/d | Mar, Apr | 001 |
| Solids, total suspended | 7-day average | ≤ 19 lb/d | Nov, Dec | 001 |
| Solids, total suspended | 7-day average | ≤ 42 lb/d | Mar, Apr | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .8 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .9 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Apr | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .42 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .46 lb/d | Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .33 lb/d | Apr | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .38 lb/d | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Nov | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .42 lb/d | Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | Mar, Apr, Nov, Dec | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Apr, Nov, Dec | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Apr, Nov, Dec | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Mar, Apr, Nov, Dec | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Mar, Apr, Nov, Dec | 001 |
| Coliform, fecal general | monthly average | ≤ 200 #/100mL | Mar, Apr, Nov, Dec | 001 |
| Coliform, fecal general | 7-day average | ≤ 400 #/100mL | Mar, Apr, Nov, Dec | 001 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | Mar, Apr, Nov, Dec | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | 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 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 002 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 40 mg/L | Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | 7-day average | report only (lb/d) | Mar, Apr, Nov, Dec | 003 |
| pH | daily minimum | ≥ 6.5 SU | Mar, Apr, Nov, Dec | 003 |
| pH | daily maximum | ≤ 10 SU | Mar, Apr, Nov, Dec | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Nov, Dec | 003 |
| Solids, total suspended | monthly average | ≤ 70 mg/L | Mar, Apr | 003 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Nov, Dec | 003 |
| Solids, total suspended | 7-day average | ≤ 100 mg/L | Mar, Apr | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | Nov, Dec | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Apr | 003 |
| Solids, total suspended | monthly average | report only (lb/d) | Nov, Dec | 003 |
| Solids, total suspended | monthly average | report only (lb/d) | Mar, Apr | 003 |
| Solids, total suspended | 7-day average | report only (lb/d) | Nov, Dec | 003 |
| Solids, total suspended | 7-day average | report only (lb/d) | Mar, Apr | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .9 mg/L | Nov | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Mar | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .8 mg/L | Apr | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Nov | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Dec | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Nov | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Mar | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Apr | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Nov | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Mar | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Apr | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Dec | 003 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Apr, Nov, Dec | 003 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Apr, Nov, Dec | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Mar, Apr, Nov, Dec | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Mar, Apr, Nov, Dec | 003 |
| Coliform, fecal general | monthly average | ≤ 200 #/100mL | Mar, Apr, Nov, Dec | 003 |
| Coliform, fecal general | 7-day average | ≤ 400 #/100mL | Mar, Apr, Nov, Dec | 003 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | Mar, Apr, Nov, Dec | 003 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 004 |
| pH | daily minimum | ≥ 6.5 SU | all year | 004 |
| pH | daily maximum | ≤ 9 SU | all year | 004 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 004 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 004 |
| Solids, total | monthly minimum | report only (%) | all year | SLD |
| Solids, total | monthly average | report only (%) | all year | SLD |
| Solids, total | monthly maximum | report only (%) | all year | SLD |
| Arsenic, dry weight | monthly minimum | report only (mg/kg) | all year | SLD |
| Arsenic, dry weight | monthly average | report only (mg/kg) | all year | SLD |
| Arsenic, dry weight | monthly maximum | ≤ 75 mg/kg | all year | SLD |
| Selenium, dry weight | monthly minimum | report only (mg/kg) | all year | SLD |
| Selenium, dry weight | monthly average | report only (mg/kg) | all year | SLD |
| Selenium, dry weight | monthly maximum | ≤ 100 mg/kg | all year | SLD |
| Copper, dry weight | monthly minimum | report only (mg/kg) | all year | SLD |
| Copper, dry weight | monthly average | report only (mg/kg) | all year | SLD |
| Copper, dry weight | monthly maximum | ≤ 4300 mg/kg | all year | SLD |
| Cadmium, dry weight | monthly minimum | report only (mg/kg) | all year | SLD |
| Cadmium, dry weight | monthly average | report only (mg/kg) | all year | SLD |
| Cadmium, dry weight | monthly maximum | ≤ 85 mg/kg | all year | SLD |
| Nitrogen, total Kjeldahl | monthly minimum | report only (mg/kg) | all year | SLD |
| Nitrogen, total Kjeldahl | monthly average | report only (mg/kg) | all year | SLD |
| Nitrogen, total Kjeldahl | monthly maximum | report only (mg/kg) | all year | SLD |
| Molybdenum, sludge, total, dry weight [as Mo] | monthly minimum | report only (mg/kg) | all year | SLD |
| Molybdenum, sludge, total, dry weight [as Mo] | monthly average | report only (mg/kg) | all year | SLD |
| Molybdenum, sludge, total, dry weight [as Mo] | monthly maximum | ≤ 75 mg/kg | all year | SLD |
| Zinc, sludge, total, dry weight [as Zn] | monthly minimum | report only (mg/kg) | all year | SLD |
| Zinc, sludge, total, dry weight [as Zn] | monthly average | report only (mg/kg) | all year | SLD |
| Zinc, sludge, total, dry weight [as Zn] | monthly maximum | ≤ 7500 mg/kg | all year | SLD |
| Lead, sludge, total, dry weight [as Pb] | monthly minimum | report only (mg/kg) | all year | SLD |
| Lead, sludge, total, dry weight [as Pb] | monthly average | report only (mg/kg) | all year | SLD |
| Lead, sludge, total, dry weight [as Pb] | monthly maximum | ≤ 840 mg/kg | all year | SLD |
| Nickel, sludge, total, dry weight [as Ni] | monthly minimum | report only (mg/kg) | all year | SLD |
| Nickel, sludge, total, dry weight [as Ni] | monthly average | report only (mg/kg) | all year | SLD |
| Nickel, sludge, total, dry weight [as Ni] | monthly maximum | ≤ 420 mg/kg | all year | SLD |
| Nitrogen, sludge, total, dry weight [as N] | monthly minimum | report only (mg/kg) | all year | SLD |
| Nitrogen, sludge, total, dry weight [as N] | monthly average | report only (mg/kg) | all year | SLD |
| Nitrogen, sludge, total, dry weight [as N] | monthly maximum | report only (mg/kg) | all year | SLD |
| Mercury, sludge, total, dry weight [as Hg] | monthly minimum | report only (mg/kg) | all year | SLD |
| Mercury, sludge, total, dry weight [as Hg] | monthly average | report only (mg/kg) | all year | SLD |
| Mercury, sludge, total, dry weight [as Hg] | monthly maximum | ≤ 57 mg/kg | all year | SLD |
| Potassium, sludge, total, dry weight [as K] | monthly minimum | report only (mg/kg) | all year | SLD |
| Potassium, sludge, total, dry weight [as K] | monthly average | report only (mg/kg) | all year | SLD |
| Potassium, sludge, total, dry weight [as K] | monthly maximum | report only (mg/kg) | all year | SLD |
| Phosphorus, sludge, total, dry weight [as P] | monthly minimum | report only (mg/kg) | all year | SLD |
| Phosphorus, sludge, total, dry weight [as P] | monthly average | report only (mg/kg) | all year | SLD |
| Phosphorus, sludge, total, dry weight [as P] | monthly maximum | report only (mg/kg) | all year | SLD |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Thermal Discharge, monthly average outfall 002 | 0.17 MBTU/hr | new | — | — |
| Thermal Discharge, monthly average outfall 004 | 0.087 MBTU/hr | new | — | — |
Cited limits by parameter: Michigan's rules and the federal ones.
Same industry: the 6 Fabricated Metal Products 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/MI0002429 · MCP: https://passage-data.com/mcp