City of Cadillac

NPDES permit MI0020257 · Major POTW · effective, expires 2027-10-01 · 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

5values over a limit
2required values missing, on 2 form(s)
3of 12 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, carbonaceous [5 day, 20 C] (2), Coliform, fecal general (2), Nitrogen, ammonia total [as N] (1).

Reporting

Reports are due about 21 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (137)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 6 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Oxygen, dissolved [DO]DAILY MN >= 5 mg/L Jan, Feb, Mar, Apr, Dec
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 20 mg/L Jun, Jul, Aug, Sep
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, total suspended7 DA AVG <= 30 mg/L Jun, Jul, Aug, Sep
001Solids, total suspended7 DA AVG <= 45 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, total suspendedMO AVG <= 530 lb/d Jun, Jul, Aug, Sep
001Solids, total suspendedMO AVG <= 800 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, total suspended7 DA AVG <= 800 lb/d Jun, Jul, Aug, Sep
001Solids, total suspended7 DA AVG <= 1200 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= .9 mg/L Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MO AVG <= 1.6 mg/L Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 4.8 mg/L Apr, May
001Nitrogen, ammonia total [as N]DAILY MX <= 2 mg/L Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 2.8 mg/L Oct, Nov
001Nitrogen, ammonia total [as N]DAILY MX report only Apr, May
001Nitrogen, ammonia total [as N]MO AVG <= 24 lb/d Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MO AVG <= 43 lb/d Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 130 lb/d Apr, May
001Nitrogen, ammonia total [as N]7 DA AVG <= 53 lb/d Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]7 DA AVG = 75 lb/d Oct, Nov
001Nitrogen, ammonia total [as N]DAILY MX report only Apr, May
001Phosphorus, total [as P]MO AVG <= .5 mg/L Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001Phosphorus, total [as P]MO AVG <= .65 mg/L Apr
001Phosphorus, total [as P]DAILY MX report only Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001Phosphorus, total [as P]DAILY MX report only Apr
001Phosphorus, total [as P]MO AVG <= 13 lb/d Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001Phosphorus, total [as P]MO AVG <= 17 lb/d Apr
001Phosphorus, total [as P]DAILY MX report only Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
001Phosphorus, total [as P]DAILY MX report only Apr
001Chloride [as Cl]DAILY MX report only all year
001Sulfate, total [as SO4]DAILY MX report only all year
001Arsenic, total [as As]MO AVG = 16 ug/L all year
001Arsenic, total [as As]DAILY MX report only all year
001Arsenic, total [as As]MO AVG = .43 lb/d all year
001Arsenic, total [as As]DAILY MX report only all year
001Beryllium, total [as Be]MO AVG = 4.1 ug/L all year
001Beryllium, total [as Be]DAILY MX report only all year
001Beryllium, total [as Be]MO AVG = .11 lb/d all year
001Beryllium, total [as Be]DAILY MX report only all year
001Cadmium, total [as Cd]MO AVG = 4.1 ug/L all year
001Cadmium, total [as Cd]DAILY MX = 12 ug/L all year
001Cadmium, total [as Cd]MO AVG = .11 lb/d all year
001Cadmium, total [as Cd]7 DA AVG = .32 lb/d 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 = .037 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 = .16 lb/d all year
001Cyanide [A]DAILY MX report only all year
001Toxicity, choice of speciesMO AVG = 1.1 tox chronic all year
001Toxicity, choice of speciesVALUE report only all year
001BromomethaneDAILY MX report only all year
001BenzidineMO AVG = .12 ug/L all year
001BenzidineDAILY MX report only all year
001BenzidineMO AVG = .0032 lb/d all year
001BenzidineDAILY 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
001PerfluorooctanesulfonateDAILY MX report only all year
001Toxicity [acute], Ceriodaphnia dubiaDAILY 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 <= 2 ng/L all year
001Mercury, total [as Hg]1D <= .000053 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 <= 17 mg/L Apr, May
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 11 mg/L Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 7 mg/L Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 23 mg/L Jan, Feb, Mar, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 25 mg/L Apr, May
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 17 mg/L Oct, Nov
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 10 mg/L Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 34 mg/L Jan, Feb, Mar, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 450 lb/d Apr, May
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 290 lb/d Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 190 lb/d Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 610 lb/d Jan, Feb, Mar, Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 670 lb/d Apr, May
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 450 lb/d Oct, Nov
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 270 lb/d Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 910 lb/d Jan, Feb, Mar, Dec
001Solids, suspended percent removalMINIMUM >= 85 % Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, suspended percent removalDAILY MN report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001TU Static 24 Hr Acute Pimephales promelasDAILY MX report only all year
001Static 48 Hr Chronic Pimphales PromelasMO AVG = 1.1 tox chronic all year
001Static 48 Hr Chronic Pimphales PromelasVALUE report only all year
SLDSolids, totalMO MIN report only all year
SLDSolids, totalMO AVG report only all year
SLDSolids, totalMO MAX report only all year
SLDArsenic, dry weightMO MIN report only all year
SLDArsenic, dry weightMO AVG report only all year
SLDArsenic, dry weightMO MAX <= 75 mg/kg all year
SLDSelenium, dry weightMO MIN report only all year
SLDSelenium, dry weightMO AVG report only all year
SLDSelenium, dry weightMO MAX <= 100 mg/kg all year
SLDCopper, dry weightMO MIN report only all year
SLDCopper, dry weightMO AVG report only all year
SLDCopper, dry weightMO MAX <= 4300 mg/kg all year
SLDCadmium, dry weightMO MIN report only all year
SLDCadmium, dry weightMO AVG report only all year
SLDCadmium, dry weightMO MAX <= 85 mg/kg all year
SLDNitrogen, total KjeldahlMO MIN report only all year
SLDNitrogen, total KjeldahlMO AVG report only all year
SLDNitrogen, total KjeldahlMO MAX report only all year
SLDMolybdenum, sludge, total, dry weight [as Mo]MO MIN report only all year
SLDMolybdenum, sludge, total, dry weight [as Mo]MO AVG report only all year
SLDMolybdenum, sludge, total, dry weight [as Mo]MO MAX <= 75 mg/kg all year
SLDZinc, sludge, total, dry weight [as Zn]MO MIN report only all year
SLDZinc, sludge, total, dry weight [as Zn]MO AVG report only all year
SLDZinc, sludge, total, dry weight [as Zn]MO MAX <= 7500 mg/kg all year
SLDLead, sludge, total, dry weight [as Pb]MO MIN report only all year
SLDLead, sludge, total, dry weight [as Pb]MO AVG report only all year
SLDLead, sludge, total, dry weight [as Pb]MO MAX <= 840 mg/kg all year
SLDNickel, sludge, total, dry weight [as Ni]MO MIN report only all year
SLDNickel, sludge, total, dry weight [as Ni]MO AVG report only all year
SLDNickel, sludge, total, dry weight [as Ni]MO MAX <= 420 mg/kg all year
SLDNitrogen, sludge, total, dry weight [as N]MO MIN report only all year
SLDNitrogen, sludge, total, dry weight [as N]MO AVG report only all year
SLDNitrogen, sludge, total, dry weight [as N]MO MAX report only all year
SLDMercury, sludge, total, dry weight [as Hg]MO MIN report only all year
SLDMercury, sludge, total, dry weight [as Hg]MO AVG report only all year
SLDMercury, sludge, total, dry weight [as Hg]MO MAX <= 57 mg/kg all year
SLDPotassium, sludge, total, dry weight [as K]MO MIN report only all year
SLDPotassium, sludge, total, dry weight [as K]MO AVG report only all year
SLDPotassium, sludge, total, dry weight [as K]MO MAX report only all year
SLDPhosphorus, sludge, total, dry weight [as P]MO MIN report only all year
SLDPhosphorus, sludge, total, dry weight [as P]MO AVG report only all year
SLDPhosphorus, sludge, total, dry weight [as P]MO MAX report only all year

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