Mitchell, City of

NPDES permit SD0023361 · Major POTW · effective, expires 2029-12-31 · 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

0values over a limit
1required values missing, on 1 form(s)
2of 25 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (160)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigrade30DA AVG report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001Flow rate30DA AVG report only all year
001Flow rateDAILY MX report only all year
001Flow rate30DA AVG report only all year
001Flow rateDAILY MX report only all year
001BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedMX 7D AV <= 45 mg/L all year
001Oil and grease, hexane extr methodDAILY MX <= 10 mg/L all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]30DA AVG report only Jan, Feb, Dec
001Nitrogen, ammonia total [as N]30DA AVG report only Mar, Apr
001Nitrogen, ammonia total [as N]30DA AVG report only May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]30DA AVG report only Sep, Oct
001Nitrogen, ammonia total [as N]30DA AVG report only Nov
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Mar, Apr
001Nitrogen, ammonia total [as N]DAILY MX report only May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX report only Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX report only Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 477 lb/d Jan, Feb, Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 143 lb/d Mar, Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 80 lb/d May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 107 lb/d Sep, Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 115 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 1041 lb/d Jan, Feb, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 468 lb/d Mar, Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 141 lb/d May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 201 lb/d Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 201 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG report only Jan, Feb, Dec
001Nitrogen, ammonia total [as N]30DA AVG report only Mar
001Nitrogen, ammonia total [as N]30DA AVG report only Apr
001Nitrogen, ammonia total [as N]30DA AVG report only May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]30DA AVG report only Sep, Oct
001Nitrogen, ammonia total [as N]30DA AVG report only Nov
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Mar
001Nitrogen, ammonia total [as N]DAILY MX report only Apr
001Nitrogen, ammonia total [as N]DAILY MX report only May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX report only Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX report only Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 917 lb/d Jan, Feb, Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 309 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 309 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 192 lb/d May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 205 lb/d Sep, Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 289 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 2091 lb/d Jan, Feb, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 1015 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 655 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 354 lb/d May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 522 lb/d Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 522 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG report only Jan, Feb, Dec
001Nitrogen, ammonia total [as N]30DA AVG report only Mar
001Nitrogen, ammonia total [as N]30DA AVG report only Apr
001Nitrogen, ammonia total [as N]30DA AVG report only May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]30DA AVG report only Sep, Oct
001Nitrogen, ammonia total [as N]30DA AVG report only Nov
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Mar
001Nitrogen, ammonia total [as N]DAILY MX report only Apr
001Nitrogen, ammonia total [as N]DAILY MX report only May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX report only Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX report only Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 1849 lb/d Jan, Feb, Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 604 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 594 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 306 lb/d May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 323 lb/d Sep, Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 466 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 3239 lb/d Jan, Feb, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 2523 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 1068 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 572 lb/d May, Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 849 lb/d Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 849 lb/d Nov
001Phosphorus, total [as P]DAILY MX report only all year
001Cyanide, free [as free]VALUE report only all year
001Cyanide, free [as free]VALUE report only all year
001Cyanide, total [as CN]VALUE report only all year
001Cyanide, total [as CN]VALUE report only all year
001Hardness, total [as CaCO3]DAILY MN report only all year
001Hardness, total [as CaCO3]DAILY MN report only all year
001Hardness, total [as CaCO3]30DA AVG report only all year
001Hardness, total [as CaCO3]DAILY MN report only all year
001Arsenic, total recoverableVALUE report only all year
001Arsenic, total recoverableVALUE report only all year
001Selenium, total recoverableVALUE report only all year
001Selenium, total recoverableVALUE report only all year
001Thallium, total recoverableVALUE report only all year
001Thallium, total recoverableVALUE report only all year
001Beryllium, total recoverable [as Be]VALUE report only all year
001Beryllium, total recoverable [as Be]VALUE report only all year
001Nickel, total recoverableVALUE report only all year
001Nickel, total recoverableVALUE report only all year
001Silver total recoverableVALUE report only all year
001Silver total recoverableVALUE report only all year
001Zinc, total recoverableVALUE report only all year
001Zinc, total recoverableVALUE report only all year
001Aluminum, total recoverableVALUE report only all year
001Aluminum, total recoverableVALUE report only all year
001Cadmium, total recoverableVALUE report only all year
001Cadmium, total recoverableVALUE report only all year
001Lead, total recoverableVALUE report only all year
001Lead, total recoverableVALUE report only all year
001Chromium, total recoverableVALUE report only all year
001Chromium, total recoverableVALUE report only all year
001Copper, total recoverable30DA AVG report only all year
001Copper, total recoverableDAILY MX report only all year
001Copper, total recoverableVALUE report only all year
001Copper, total recoverable30DA AVG <= 3419 lb/d all year
001Copper, total recoverableDAILY MX <= 5795 lb/d all year
001Copper, total recoverable30DA AVG report only all year
001Copper, total recoverableDAILY MX report only all year
001Copper, total recoverableVALUE report only all year
001Molybdenum, total recoverableVALUE report only all year
001Molybdenum, total recoverableVALUE report only all year
001Antimony, total recoverableVALUE report only all year
001Antimony, total recoverableVALUE report only all year
001PhenolsVALUE report only all year
001PhenolsVALUE report only all year
001E. coli, colony forming units [CFU]30DA GEO <= 630 #/100mL May, Jun, Jul, Aug, Sep
001E. coli, colony forming units [CFU]DAILY MX <= 1178 #/100mL May, Jun, Jul, Aug, Sep
001Flow, totalMO TOTAL report only all year
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX < 1 tox acute all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX < 1 tox acute all year
001Mercury, total recoverableVALUE report only all year
001Mercury, total recoverableVALUE report only all year
001Duration of dischargeMO TOTAL report only all year
001Oil and grease visualDAILY MX <= 0 abst=0;prst=1 all year
001Report due [yrmoda]VALUE report only all year
001Report due [yrmoda]VALUE report only all year
001Report due [yrmoda]VALUE <= 0 Y=0;N=1 all year
001Report due [yrmoda]VALUE report only all year
002Temperature, water deg. centigradeMO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Flow rate30DA AVG report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Flow rateMO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002ConductivityMO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002BOD, 5-day, 20 deg. CMO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002pHMO MIN report only Apr, May, Jun, Jul, Aug, Sep, Oct
002pHMO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Solids, total suspendedMO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]MO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, nitrite total [as N]MO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, nitrate total [as N]MO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, Kjeldahl, total [as N]MO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Phosphorus, total [as P]MO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Sodium adsorption ratioMO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Chloride [as Cl]MO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Sulfate, total [as SO4]MO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002E. coli, colony forming units [CFU]MO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Total Amount Land AppliedMO TOTAL report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Duration of Land ApplicationMO TOTAL report only Apr, May, Jun, Jul, Aug, Sep, Oct
002Solids, total dissolvedMO MAX report only Apr, May, Jun, Jul, Aug, Sep, 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