AURORA WWTF

NPDES permit NE0031810 · Major POTW · effective, expires 2028-03-31 · 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
0required values missing, on 0 form(s)
0of 18 forms filed late

Last period with anything received: 2026-06-30.

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 (65)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001pHDAILY MN >= 6.5 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 <= 170.3 kg/d all year
001Solids, total suspended7 DA AVG <= 272.5 kg/d all year
001Oil and grease, hexane extr methodMO AVG report only all year
001Oil and grease, hexane extr methodDAILY MX <= 10 mg/L all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 2.95 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 1.55 mg/L Mar, Apr, May
001Nitrogen, ammonia total [as N]MO AVG <= .86 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 5.91 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 3.11 mg/L Mar, Apr, May
001Nitrogen, ammonia total [as N]DAILY MX <= 1.73 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 9.52 kg/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 4.97 kg/d Mar, Apr, May
001Nitrogen, ammonia total [as N]MO AVG <= 2.91 kg/d Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 19.11 kg/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 9.97 kg/d Mar, Apr, May
001Nitrogen, ammonia total [as N]DAILY MX <= 5.83 kg/d Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Arsenic, dissolved [as As]MO AVG report only all year
001Arsenic, dissolved [as As]DAILY MX report only all year
001Beryllium, dissolved [as Be]MO AVG report only all year
001Beryllium, dissolved [as Be]DAILY MX report only all year
001Cadmium, dissolved [as Cd]MO AVG report only all year
001Cadmium, dissolved [as Cd]DAILY MX report only all year
001Chromium, dissolved [as Cr]MO AVG report only all year
001Chromium, dissolved [as Cr]DAILY MX report only all year
001Copper, dissolved [as Cu]MO AVG report only all year
001Copper, dissolved [as Cu]DAILY MX report only all year
001Lead, dissolved [as Pb]MO AVG report only all year
001Lead, dissolved [as Pb]DAILY MX report only all year
001Nickel, dissolved [as Ni]MO AVG report only all year
001Nickel, dissolved [as Ni]DAILY MX report only all year
001Silver, dissolved [as Ag]MO AVG report only all year
001Silver, dissolved [as Ag]DAILY MX report only all year
001Zinc, dissolved [as Zn]MO AVG report only all year
001Zinc, dissolved [as Zn]DAILY MX report only all year
001Selenium, dissolved [as Se]MO AVG report only all year
001Selenium, dissolved [as Se]DAILY MX report only all year
001E. coli, MTEC-MFMO GEO report only May, Jun, Jul, Aug, Sep
001E. coli, MTEC-MFDAILY MX report only May, Jun, Jul, Aug, Sep
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Toxicity [acute], Ceriodaphnia dubiaMO AVG report only all year
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX <= 1 tox acute all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MO AVG report only all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX <= 1 tox acute all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 204.4 kg/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 306.6 kg/d all year
INFpHVALUE report only all year
INFSolids, total suspendedVALUE report only all year
INFBeryllium, dissolved [as Be]VALUE report only all year
INFCopper, dissolved [as Cu]VALUE report only all year
INFZinc, dissolved [as Zn]VALUE report only all year
INFFlow, in conduit or thru treatment plantVALUE report only all year
INFBOD, carbonaceous [5 day, 20 C]VALUE 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