City of Midland

NPDES permit MI0023582 · Major POTW · administratively continued, expires 2013-10-01 · 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.

This permit expired on 2013-10-01 and is administratively continued: 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

0values over a limit
7required values missing, on 7 form(s)
1of 12 forms filed late

Last period with anything received: 2026-07-31.

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 (84)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 4 mg/L all year
001pHDAILY MN >= 6 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 <= 2500 lb/d all year
001Solids, total suspended7 DA AVG <= 3800 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG report only Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO MAX report only Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 1000 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= 1000 lb/d Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
001Phosphorus, total [as P]MO AVG <= 83 lb/d all year
001Toxicity, choice of speciesMO AVG report only Jan, Apr, Jul, Oct
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 <= .038 mg/L all year
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX report only Jan, Apr, Jul, Oct
001Solids, total dissolvedDAILY MX report only all year
001Mercury, total [as Hg]MO AVG report only Jan, Apr, Jul, Oct
001Mercury, total [as Hg]MO MAX report only Jan, Apr, Jul, Oct
001Mercury, total [as Hg]1D <= 5 ng/L Jan, Apr, Jul, Oct
001Mercury, total [as Hg]1D <= .0004 lb/d Jan, Apr, Jul, Oct
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 <= 25 mg/L Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 13 mg/L Jun, Jul, Aug
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 19 mg/L Jun, Jul, Aug
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 2100 lb/d Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 1100 lb/d Jun, Jul, Aug
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 3300 lb/d Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 1600 lb/d Jun, Jul, Aug
001BOD, carb-5 day, 20 deg C, percent removalMINIMUM >= 85 % Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001Solids, suspended percent removalMO AV MN >= 75 % Feb, Mar, Apr, May, Sep, Oct, Nov
001Solids, suspended percent removalMINIMUM >= 85 % Jan, Jun, Jul, Aug, Dec
001TU Static 24 Hr Acute Pimephales promelasDAILY MX report only Jan, Apr, Jul, Oct
001Static 48 Hr Chronic Pimphales PromelasMO AVG report only Jan, Apr, Jul, Oct
SLDSolids, totalMO MIN report only Oct
SLDSolids, totalMO AVG report only Oct
SLDSolids, totalMO TOTAL report only Oct
SLDArsenic, dry weightMO MIN report only Oct
SLDArsenic, dry weightMO AVG report only Oct
SLDArsenic, dry weightMO MAX report only Oct
SLDSelenium, dry weightMO MIN report only Oct
SLDSelenium, dry weightMO AVG report only Oct
SLDSelenium, dry weightMO MAX report only Oct
SLDCopper, dry weightMO MIN report only Oct
SLDCopper, dry weightMO AVG report only Oct
SLDCopper, dry weightMO MAX report only Oct
SLDCadmium, dry weightMO MIN report only Oct
SLDCadmium, dry weightMO AVG report only Oct
SLDCadmium, dry weightMO MAX report only Oct
SLDNitrogen, total KjeldahlMO MIN report only Oct
SLDNitrogen, total KjeldahlMO AVG report only Oct
SLDNitrogen, total KjeldahlMO MAX report only Oct
SLDMolybdenum, sludge, total, dry weight [as Mo]MO MIN report only Oct
SLDMolybdenum, sludge, total, dry weight [as Mo]MO AVG report only Oct
SLDMolybdenum, sludge, total, dry weight [as Mo]MO MAX report only Oct
SLDZinc, sludge, total, dry weight [as Zn]MO MIN report only Oct
SLDZinc, sludge, total, dry weight [as Zn]MO AVG report only Oct
SLDZinc, sludge, total, dry weight [as Zn]MO MAX report only Oct
SLDLead, sludge, total, dry weight [as Pb]MO MIN report only Oct
SLDLead, sludge, total, dry weight [as Pb]MO AVG report only Oct
SLDLead, sludge, total, dry weight [as Pb]MO MAX report only Oct
SLDNickel, sludge, total, dry weight [as Ni]MO MIN report only Oct
SLDNickel, sludge, total, dry weight [as Ni]MO AVG report only Oct
SLDNickel, sludge, total, dry weight [as Ni]MO MAX report only Oct
SLDNitrogen, sludge, total, dry weight [as N]MO MIN report only Oct
SLDNitrogen, sludge, total, dry weight [as N]MO AVG report only Oct
SLDNitrogen, sludge, total, dry weight [as N]MO MAX report only Oct
SLDMercury, sludge, total, dry weight [as Hg]MO MIN report only Oct
SLDMercury, sludge, total, dry weight [as Hg]MO AVG report only Oct
SLDMercury, sludge, total, dry weight [as Hg]MO MAX report only Oct
SLDPotassium, sludge, total, dry weight [as K]MO MIN report only Oct
SLDPotassium, sludge, total, dry weight [as K]MO AVG report only Oct
SLDPotassium, sludge, total, dry weight [as K]MO MAX report only Oct
SLDPhosphorus, sludge, total, dry weight [as P]MO MIN report only Oct
SLDPhosphorus, sludge, total, dry weight [as P]MO AVG report only Oct
SLDPhosphorus, sludge, total, dry weight [as P]MO MAX report only Oct

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