Huron, City of

NPDES permit SD0023434 · Major POTW · effective, expires 2027-06-30 · 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
0required values missing, on 0 form(s)
0of 43 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 (108)

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
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 all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]30DA AVG <= 82 lb/d May
001Nitrogen, ammonia total [as N]30DA AVG <= 59 lb/d Aug, Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 144 lb/d Jan, Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 114 lb/d Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 63 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 60 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 123 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 55 lb/d Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 382 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 268 lb/d Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 658 lb/d Jan, Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 439 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 288 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 273 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 439 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 275 lb/d Oct, Nov, Dec
001Phosphorus, total [as P]DAILY MX report only all year
001Cyanide, weak acid, dissociableVALUE report only all year
001Cyanide, weak acid, dissociableVALUE 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]VALUE report only all year
001Hardness, total [as CaCO3]VALUE 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 recoverableVALUE 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 < 1 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 report only all year
001Report due [yrmoda]VALUE < 1 Y=0;N=1 all year
002Temperature, water deg. centigrade30DA AVG report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002Flow rate30DA AVG report only all year
002Flow rateDAILY MX report only all year
002BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspended30DA AVG <= 30 mg/L all year
002Solids, total suspendedMX 7D AV <= 45 mg/L all year
002Nitrogen, total [as N]DAILY MX report only all year
002Phosphorus, total [as P]DAILY MX report only all year
002Flow, totalMO TOTAL report only all year
002Duration of dischargeMO TOTAL report only all year
003Temperature, water deg. centigrade30DA AVG report only all year
003Temperature, water deg. centigradeDAILY MX report only all year
003Flow rate30DA AVG report only all year
003Flow rateDAILY MX report only all year
003BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
003BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
003pHDAILY MN >= 6 SU all year
003pHDAILY MX <= 9 SU all year
003Solids, total suspended30DA AVG <= 30 mg/L all year
003Solids, total suspendedMX 7D AV <= 45 mg/L all year
003Nitrogen, total [as N]DAILY MX report only all year
003Phosphorus, total [as P]DAILY MX report only all year
003Flow, totalMO TOTAL report only all year
003Duration of dischargeMO TOTAL 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