Gogebic-Iron Wastewater Authority

NPDES permit MI0020125 · Major POTW · effective, expires 2029-10-01 · EPA's file as of 2026-09-19

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Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

3values over a limit
0required values missing, on 0 form(s)
0of 13 forms filed late

Last period with anything received: 2026-08-31. Most often over: Solids, suspended percent removal (2), Solids, total suspended (1).

Reporting

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

Limits in force (56)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 4 mg/L all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspended7 DA AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 850 lb/d all year
001Solids, total suspended7 DA AVG <= 1300 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 11 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 2.3 mg/L Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 4.5 mg/L Jun
001Nitrogen, ammonia total [as N]7 DA AVG <= 65 lb/d Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MO AVG <= 310 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]7 DA AVG <= 130 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX report only Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Jun
001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG <= 28 lb/d all year
001Phosphorus, total [as P]DAILY MX report only all year
001Chloride [as Cl]DAILY MX report only all year
001Sulfate, total [as SO4]DAILY MX report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Silver, total [as Ag]MO AVG <= 1.4 ug/L all year
001Silver, total [as Ag]DAILY MX report only all year
001Silver, total [as Ag]MO AVG <= .04 lb/d all year
001Silver, total [as Ag]DAILY MX report only all year
001Cyanide [A]MO AVG <= 5.9 ug/L all year
001Cyanide [A]DAILY MX report only all year
001Cyanide [A]MO AVG <= .17 lb/d all year
001Cyanide [A]DAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= 38 ug/L all year
001PerfluorooctanesulfonateDAILY MX report only all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]1D <= 3 ng/L all year
001Mercury, total [as Hg]1D <= .000085 lb/d all year
001Coliform, fecal generalMO GEOMN <= 200 #/100mL all year
001Coliform, fecal general7 DA GEO <= 400 #/100mL all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 15 mg/L Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 280 lb/d Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 710 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 430 lb/d Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 1100 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001BOD, carb-5 day, 20 deg C, percent removalMINIMUM >= 85 % Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001BOD, carb-5 day, 20 deg C, percent removalDAILY MN report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, suspended percent removalMINIMUM >= 85 % all year
001Solids, suspended percent removalDAILY MN 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