Portage Lake Water and Sewage Authority

NPDES permit MI0020061 · Major POTW · effective, expires 2027-10-01 · EPA's file as of 2026-09-19

Check this month's numbers before you file
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

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

Last period with anything received: 2026-07-31. Most often over: pH (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 (81)

OutfallParameterStatisticLimitMonths
004Oxygen, dissolved [DO]DAILY MN >= 4 mg/L all year
004pHDAILY MN >= 6.5 SU all year
004pHDAILY MX <= 9 SU all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Solids, total suspended7 DA AVG <= 45 mg/L all year
004Solids, total suspendedMO AVG <= 780 lb/d all year
004Solids, total suspended7 DA AVG <= 1200 lb/d all year
004Nitrogen, ammonia total [as N]DAILY MX report only all year
004Phosphorus, total [as P]MO AVG <= 1 mg/L all year
004Phosphorus, total [as P]DAILY MX report only all year
004Phosphorus, total [as P]MO AVG <= 26 lb/d all year
004Phosphorus, total [as P]DAILY MX report only all year
004Chloride [as Cl]DAILY MX report only all year
004Sulfate, total [as SO4]DAILY MX report only all year
004Copper, total [as Cu]DAILY MX = 43 ug/L all year
004Copper, total [as Cu]7 DA AVG = 1.1 lb/d all year
004Copper, total [as Cu]DAILY MX report only all year
004BenzidineMO AVG = .8 ug/L all year
004BenzidineDAILY MX report only all year
004BenzidineMO MAX = .021 lb/d all year
004BenzidineDAILY MX report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Mercury, total [as Hg]MO AVG report only all year
004Mercury, total [as Hg]DAILY MX report only all year
004Mercury, total [as Hg]MO AVG report only all year
004Mercury, total [as Hg]DAILY MX report only all year
004Mercury, total [as Hg]1D <= 4 ng/L all year
004Mercury, total [as Hg]1D <= .0001 lb/d all year
004Coliform, fecal generalMO GEOMN <= 200 #/100mL all year
004Coliform, fecal general7 DA GEO <= 400 #/100mL all year
004BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
004BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
004BOD, carbonaceous [5 day, 20 C]MO AVG <= 650 lb/d all year
004BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 1000 lb/d all year
004BOD, carb-5 day, 20 deg C, percent removalMINIMUM >= 85 % all year
004BOD, carb-5 day, 20 deg C, percent removalDAILY MN report only all year
004Solids, suspended percent removalMINIMUM >= 85 % all year
004Solids, suspended percent removalDAILY MN 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