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Steam And Air-Conditioning Supply, Duluth, Minnesota. NPDES permit MN0001015, in force until Jan 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | D003 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | D003 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | D003 |
| Temperature, water deg. fahrenheit | daily average | report only (deg F) | all year | D005 |
| Specific conductance | monthly maximum | report only (umho/cm) | all year | D005 |
| Plant capacity fact. percent of capacity | monthly maximum | report only (%) | all year | D005 |
| pH | monthly minimum | ≥ 6 SU | all year | D005 |
| pH | monthly maximum | ≤ 9 SU | all year | D005 |
| Bicarbonate ion- [as HCO3] | monthly maximum | report only (mg/L) | all year | D005 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Mar, Sep | D005 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Mar, Sep | D005 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Mar, Sep | D005 |
| Calcium, total [as Ca] | monthly maximum | report only (mg/L) | all year | D005 |
| Magnesium, total [as Mg] | monthly maximum | report only (mg/L) | all year | D005 |
| Sodium, total [as Na] | monthly maximum | report only (mg/L) | all year | D005 |
| Potassium, total [as K] | monthly maximum | report only (mg/L) | all year | D005 |
| Chloride [as Cl] | monthly maximum | report only (mg/L) | all year | D005 |
| Sulfate, total [as SO4] | monthly maximum | report only (mg/L) | all year | D005 |
| Hardness, Ca Mg Calculated [mg/L as CaCO3] | monthly maximum | report only (mg/L) | all year | D005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | D005 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | D005 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | D005 |
| Solids, total dissolved | monthly average | report only (mg/L) | Mar, Sep | D005 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | D012 |
| pH | monthly minimum | ≥ 6 SU | all year | D012 |
| pH | monthly maximum | ≤ 9 SU | all year | D012 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | D012 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | D012 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | D012 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | D012 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | D012 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | D012 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Mar, Dec | W001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jun, Sep | W001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jan, Feb | W001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | May, Oct | W001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Apr, Nov | W001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jul, Aug | W001 |
| Temperature, water deg. fahrenheit | monthly minimum | report only (deg F) | all year | W017 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | W017 |
| Temperature, water deg. fahrenheit | monthly maximum | report only (deg F) | all year | W017 |
| Temperature, water deg. fahrenheit | monthly minimum | report only (deg F) | all year | W018 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | W018 |
| Temperature, water deg. fahrenheit | monthly maximum | report only (deg F) | all year | W018 |
| Temp. diff. between samp. & upstrm deg. F | maximum daily average | ≤ 5 deg F | all year | W018 |
Cited limits by parameter: Minnesota's rules and the federal ones.
Same industry: the 3 Steam And Air-Conditioning Supply permits in Minnesota.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MN0001015 · MCP: https://passage-data.com/mcp