Polar Semiconductor LLC

NPDES permit MN0064661 · Minor NON-POTW · expired, expires 2021-12-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2021-12-31 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 36 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 21 days after each monitoring period ends (the most common figure among MN permits in EPA's filings — check your permit).

Limits in force (47)

OutfallParameterStatisticLimitMonths
D001Temperature, water deg. fahrenheitMO MAX <= 86 deg F all year
D001Specific conductanceMO MAX report only all year
D001pHMO MIN >= 6 SU all year
D001pHMO MAX <= 9 SU all year
D001Bicarbonate ion- [as HCO3]MO MAX report only all year
D001Solids, total suspendedMO AVG <= 30 mg/L all year
D001Solids, total suspendedDAILY MX <= 45 mg/L all year
D001Nitrogen, total [as N]MO MAX report only Mar, Sep
D001Nitrogen, Kjeldahl, total [as N]MO MAX report only Mar, Sep
D001Nitrite + Nitrate total [as N]MO MAX report only Mar, Sep
D001Phosphorus, total [as P]MO MAX report only Mar, Sep
D001Calcium, total [as Ca]MO MAX report only all year
D001Magnesium, total [as Mg]MO MAX report only all year
D001Sodium, total [as Na]MO MAX report only all year
D001Potassium, total [as K]MO MAX report only all year
D001Chloride [as Cl]MO MAX report only all year
D001Sulfate, total [as SO4]MO MAX report only all year
D001Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D001Flow, in conduit or thru treatment plantMO AVG report only all year
D001Flow, in conduit or thru treatment plantDAILY MX report only all year
D001Flow, in conduit or thru treatment plantMO TOTAL report only all year
D001Solids, total dissolvedMO MAX report only all year
D003Solids, total suspendedMO MAX report only all year
D003Solids, total suspendedDAILY MX <= 15.87 kg/d all year
D003Flow, in conduit or thru treatment plantDAILY MX <= .213 MGD all year
D004Temperature, water deg. fahrenheitMO MAX <= 86 deg F all year
D004Specific conductanceMO MAX report only all year
D004pHMO MIN >= 6 SU all year
D004pHMO MAX <= 9 SU all year
D004Bicarbonate ion- [as HCO3]MO MAX report only all year
D004Solids, total suspendedMO AVG <= 30 mg/L all year
D004Solids, total suspendedDAILY MX <= 45 mg/L all year
D004Nitrogen, total [as N]MO MAX report only Mar, Sep
D004Nitrogen, Kjeldahl, total [as N]MO MAX report only Mar, Sep
D004Nitrite + Nitrate total [as N]MO MAX report only Mar, Sep
D004Phosphorus, total [as P]MO MAX report only Mar, Sep
D004Calcium, total [as Ca]MO MAX report only all year
D004Magnesium, total [as Mg]MO MAX report only all year
D004Sodium, total [as Na]MO MAX report only all year
D004Potassium, total [as K]MO MAX report only all year
D004Chloride [as Cl]MO MAX report only all year
D004Sulfate, total [as SO4]MO MAX report only all year
D004Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D004Flow, in conduit or thru treatment plantMO AVG report only all year
D004Flow, in conduit or thru treatment plantDAILY MX report only all year
D004Flow, in conduit or thru treatment plantMO TOTAL report only all year
D004Solids, total dissolvedMO MAX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states