Two Harbors city of

NPDES permit MN0022250 · Major POTW · effective, expires 2030-10-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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 (50)

OutfallParameterStatisticLimitMonths
D061Oxygen, dissolved [DO]MO MIN report only all year
D061pHMO MIN >= 6 SU all year
D061pHMO MAX <= 9 SU all year
D061Solids, total suspendedMO AVG report only Jan, Mar, May, Jul, Sep, Nov
D061Solids, total suspendedMO AVG <= 30 mg/L all year
D061Solids, total suspendedDAILY MX report only Jan, Mar, May, Jul, Sep, Nov
D061Solids, total suspendedMX WK AV <= 45 mg/L all year
D061Solids, total suspendedMO AVG <= 157.8 kg/d all year
D061Solids, total suspendedMX WK AV <= 236.8 kg/d all year
D061Nitrogen, total [as N]MO AVG report only all year
D061Nitrogen, ammonia total [as N]MO AVG report only all year
D061Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D061Nitrite + Nitrate total [as N]MO AVG report only all year
D061Phosphorus, total [as P]MO AVG <= 1 mg/L all year
D061Phosphorus, total [as P]MO AVG <= 5.3 kg/d all year
D061Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D061Flow, in conduit or thru treatment plantMO AVG report only all year
D061Flow, in conduit or thru treatment plantMO MAX report only all year
D061Flow, in conduit or thru treatment plantMO TOTAL report only all year
D061Chlorine, total residualDAILY MX <= .038 mg/L all year
D061Solids, total dissolvedMO AVG report only Mar, Sep
D061Mercury, dissolved [as Hg]MO AVG report only Jan, Mar, May, Jul, Sep, Nov
D061Mercury, dissolved [as Hg]DAILY MX report only Jan, Mar, May, Jul, Sep, Nov
D061Mercury, total [as Hg]MO AVG <= 1.8 ng/L Jan, Mar, May, Jul, Sep, Nov
D061Mercury, total [as Hg]DAILY MX <= 3.3 ng/L Jan, Mar, May, Jul, Sep, Nov
D061Mercury, total [as Hg]MO AVG <= 9.47 mg/d Jan, Mar, May, Jul, Sep, Nov
D061Mercury, total [as Hg]DAILY MX <= 17.36 mg/d Jan, Mar, May, Jul, Sep, Nov
D061BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D061BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D061BOD, carbonaceous [5 day, 20 C]MO AVG <= 131.5 kg/d all year
D061BOD, carbonaceous [5 day, 20 C]MX WK AV <= 210.5 kg/d all year
D061BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D061Solids, suspended percent removalMO AV MN >= 85 % all year
S064Precipitation, total defined period/inMO TOTAL report only all year
S064pHMO MIN report only all year
S064pHMO MAX report only all year
S064Solids, total suspendedMO AVG report only all year
S064Solids, total suspendedMO AVG report only Jan, Mar, May, Jul, Sep, Nov
S064Solids, total suspendedMO MAX report only all year
S064Nitrogen, total [as N]MO AVG report only all year
S064Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
S064Nitrite + Nitrate total [as N]MO AVG report only all year
S064Phosphorus, total [as P]MO AVG report only all year
S064Flow, in conduit or thru treatment plantMO AVG report only all year
S064Flow, in conduit or thru treatment plantMO MAX report only all year
S064Flow, in conduit or thru treatment plantMO TOTAL report only all year
S064Mercury, dissolved [as Hg]MO AVG report only Jan, Mar, May, Jul, Sep, Nov
S064Mercury, total [as Hg]MO AVG report only Jan, Mar, May, Jul, Sep, Nov
S064BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S064BOD, carbonaceous [5 day, 20 C]MO 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