Hibbing city of

NPDES permit MN0030643 · Major POTW · expired, expires 2025-11-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2025-11-30 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

1values over a limit
0required values missing, on 0 form(s)
0of 34 forms filed late

Last period with anything received: 2026-07-31. Most often over: Oxygen, dissolved [DO] (1).

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 (63)

OutfallParameterStatisticLimitMonths
D013Specific conductanceMO MAX report only all year
D013Oxygen, dissolved [DO]MO MIN >= 12.5 mg/L Jan, Feb, Mar, Dec
D013Oxygen, dissolved [DO]MO MIN >= 7.8 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
D013pHMO MIN >= 6 SU all year
D013pHMO MAX <= 9 SU all year
D013Solids, total suspendedMO AVG report only Jan, Mar, May, Jul, Sep, Nov
D013Solids, total suspendedMO AVG <= 30 mg/L all year
D013Solids, total suspendedDAILY MX report only Jan, Mar, May, Jul, Sep, Nov
D013Solids, total suspendedMX WK AV <= 45 mg/L all year
D013Solids, total suspendedMO AVG <= 510 kg/d all year
D013Solids, total suspendedMX WK AV <= 766 kg/d all year
D013Nitrogen, total [as N]MO AVG report only all year
D013Nitrogen, ammonia total [as N]MO AVG <= 8.8 mg/L Apr, May
D013Nitrogen, ammonia total [as N]MO AVG <= 1.3 mg/L Jun, Jul, Aug, Sep
D013Nitrogen, ammonia total [as N]MO AVG <= 4.9 mg/L Oct, Nov
D013Nitrogen, ammonia total [as N]MO AVG <= 6.7 mg/L Jan, Feb, Mar, Dec
D013Nitrogen, ammonia total [as N]MO AVG <= 150 kg/d Apr, May
D013Nitrogen, ammonia total [as N]MO AVG <= 22 kg/d Jun, Jul, Aug, Sep
D013Nitrogen, ammonia total [as N]MO AVG <= 83 kg/d Oct, Nov
D013Nitrogen, ammonia total [as N]MO AVG <= 114 kg/d Jan, Feb, Mar, Dec
D013Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D013Nitrite + Nitrate total [as N]MO AVG report only all year
D013Phosphorus, total [as P]MO AVG <= 1 mg/L all year
D013Phosphorus, total [as P]MO AVG <= 17 kg/d all year
D013Chloride [as Cl]MO MAX report only all year
D013Copper, total [as Cu]QB report only Mar, Jun, Sep, Dec
D013Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D013Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D013Flow, in conduit or thru treatment plantMO AVG report only all year
D013Flow, in conduit or thru treatment plantMO MAX report only all year
D013Flow, in conduit or thru treatment plantMO TOTAL report only all year
D013Chlorine, total residualDAILY MX <= .038 mg/L all year
D013Solids, total dissolvedMO MAX report only all year
D013Mercury, dissolved [as Hg]MO AVG report only Jan, Mar, May, Jul, Sep, Nov
D013Mercury, dissolved [as Hg]DAILY MX report only Jan, Mar, May, Jul, Sep, Nov
D013Mercury, total [as Hg]MO AVG <= 1.8 ng/L Jan, Mar, May, Jul, Sep, Nov
D013Mercury, total [as Hg]DAILY MX <= 3.2 ng/L Jan, Mar, May, Jul, Sep, Nov
D013Mercury, total [as Hg]MO AVG <= 30.6 mg/d Jan, Mar, May, Jul, Sep, Nov
D013Mercury, total [as Hg]DAILY MX <= 54.4 mg/d Jan, Mar, May, Jul, Sep, Nov
D013BOD, carbonaceous [5 day, 20 C]MO AVG <= 7.7 mg/L Jan, Feb, Mar, Dec
D013BOD, carbonaceous [5 day, 20 C]MO AVG <= 9.4 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
D013BOD, carbonaceous [5 day, 20 C]MX WK AV <= 12 mg/L Jan, Feb, Mar, Dec
D013BOD, carbonaceous [5 day, 20 C]MX WK AV <= 15 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
D013BOD, carbonaceous [5 day, 20 C]MO AVG <= 131 kg/d Jan, Feb, Mar, Dec
D013BOD, carbonaceous [5 day, 20 C]MO AVG <= 160 kg/d Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
D013BOD, carbonaceous [5 day, 20 C]MX WK AV <= 204 kg/d Jan, Feb, Mar, Dec
D013BOD, carbonaceous [5 day, 20 C]MX WK AV <= 255 kg/d Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
D013BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D013Solids, suspended percent removalMO AV MN >= 85 % all year
S015Precipitation, total defined period/inMO TOTAL report only all year
S015pHMO MIN report only all year
S015pHMO MAX report only all year
S015Solids, total suspendedMO AVG report only Jan, Mar, May, Jul, Sep, Nov
S015Solids, total suspendedMO AVG report only all year
S015Solids, total suspendedMO MAX report only all year
S015Nitrogen, total [as N]MO AVG report only all year
S015Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
S015Nitrite + Nitrate total [as N]MO AVG report only all year
S015Phosphorus, total [as P]MO AVG report only all year
S015Mercury, dissolved [as Hg]MO AVG report only Jan, Mar, May, Jul, Sep, Nov
S015Mercury, total [as Hg]MO AVG report only Jan, Mar, May, Jul, Sep, Nov
S015BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S015BOD, 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