City of Howell

NPDES permit MI0021113 · 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

9values over a limit
0required values missing, on 0 form(s)
1of 12 forms filed late

Last period with anything received: 2026-07-31. Most often over: Static 48 Hr Chronic Pimphales Promelas (3), TU Static 24 Hr Acute Pimephales promelas (2), pH (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 (112)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 6 mg/L May, Jun, Jul, Aug, Sep, Oct
001Oxygen, dissolved [DO]DAILY MN >= 7 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 20 mg/L all year
001Solids, total suspended7 DA AVG <= 30 mg/L all year
001Solids, total suspendedMO AVG <= 410 lb/qtr all year
001Solids, total suspended7 DA AVG <= 610 lb/qtr all year
001Nitrogen, ammonia total [as N]MO AVG <= .5 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 6.9 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L Jan, Feb, Mar, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 2 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 6 mg/L Nov
001Nitrogen, ammonia total [as N]7 DA AVG <= 140 lb/qtr Apr
001Nitrogen, ammonia total [as N]7 DA AVG <= 200 lb/qtr Jan, Feb, Mar, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 10 lb/qtr May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]7 DA AVG <= 120 lb/qtr Nov
001Nitrogen, ammonia total [as N]7 DA AVG <= 41 lb/qtr May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]MO AVG <= .5 mg/L all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG <= 10 lb/qtr 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
001Cyanide [A]MO AVG <= 5.5 ug/L all year
001Cyanide [A]DAILY MX report only all year
001Cyanide [A]MO AVG <= .11 lb/qtr 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
001HexachlorobutadieneMO AVG < .053 ug/L all year
001HexachlorobutadieneDAILY MX report only all year
001HexachlorobutadieneMO AVG < .0011 lb/qtr all year
001HexachlorobutadieneDAILY 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
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX <= 1 tox acute 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 <= .000041 lb/qtr 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 <= 20 mg/L Jan, Feb, Mar, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L Apr
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 4 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 9 mg/L Nov
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 30 mg/L Jan, Feb, Mar, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 23 mg/L Apr
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 14 mg/L Nov
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 410 lb/qtr Jan, Feb, Mar, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 310 lb/qtr Apr
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 82 lb/qtr May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 180 lb/qtr Nov
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 610 lb/qtr Jan, Feb, Mar, Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 470 lb/qtr Apr
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 200 lb/qtr May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 290 lb/qtr Nov
001BOD, carb-5 day, 20 deg C, percent removalMINIMUM >= 85 % Jan, Feb, Mar, Dec
001BOD, carb-5 day, 20 deg C, percent removalDAILY MN report only Jan, Feb, Mar, Dec
001Solids, suspended percent removalMINIMUM >= 85 % Jan, Feb, Mar, Apr, Dec
001Solids, suspended percent removalDAILY MN report only Jan, Feb, Mar, Apr, Dec
001TU Static 24 Hr Acute Pimephales promelasDAILY MX <= 1 tox acute 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

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