OLNEY, CITY OF

NPDES permit IL0048755 · Major POTW · administratively continued, expires 2024-05-31 · 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.

This permit expired on 2024-05-31 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

9values over a limit
0required values missing, on 0 form(s)
1of 38 forms filed late

Last period with anything received: 2026-08-31. Most often over: Nitrogen, ammonia total [as N] (6), Zinc, total [as Zn] (3).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (194)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO AV MN >= 5.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
001Oxygen, dissolved [DO]MN WK AV >= 6 mg/L Mar, Apr, May, Jun, Jul
001Oxygen, dissolved [DO]MN WK AV >= 4 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
001Oxygen, dissolved [DO]DAILY MN >= 5 mg/L Mar, Apr, May, Jun, Jul
001Oxygen, dissolved [DO]DAILY MN >= 3.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 12 mg/L all year
001Solids, total suspendedDAILY MX <= 24 mg/L all year
001Solids, total suspendedMO AVG <= 550 lb/d all year
001Solids, total suspendedDAILY MX <= 1101 lb/d all year
001Oil & GreaseDAILY MX report only all year
001Oil & GreaseDAILY MX report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Feb
001Nitrogen, ammonia total [as N]MO AVG <= 2.6 mg/L Mar
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Aug
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Jul
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Jun
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Sep
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Nov
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Oct
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Jan
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Dec
001Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d May
001Nitrogen, ammonia total [as N]MO AVG <= 183 lb/d Feb
001Nitrogen, ammonia total [as N]MO AVG <= 119 lb/d Mar
001Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Aug
001Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Jul
001Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Jun
001Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Sep
001Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 183 lb/d Nov
001Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Oct
001Nitrogen, ammonia total [as N]MO AVG <= 183 lb/d Jan
001Nitrogen, ammonia total [as N]MO AVG <= 183 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 367 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 367 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 367 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 367 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 367 lb/d Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 6.5 mg/L Mar
001Nitrogen, ammonia total [as N]WKLY AVG <= 298 lb/d Mar
001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
001Phosphorus, total [as P]MO AVG <= 46 lb/d all year
001Cyanide, total [as CN]DAILY MX report only all year
001Cyanide, total [as CN]DAILY MX report only all year
001Cyanide, free [amenable to chlorination]DAILY MX report only all year
001Cyanide, free [amenable to chlorination]DAILY MX report only all year
001Fluoride, total [as F]DAILY MX report only all year
001Fluoride, total [as F]DAILY MX report only all year
001Arsenic, total [as As]DAILY MX report only all year
001Arsenic, total [as As]DAILY MX report only all year
001Barium, total [as Ba]DAILY MX report only all year
001Barium, total [as Ba]DAILY MX report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Chromium, total [as Cr]DAILY MX report only all year
001Chromium, total [as Cr]DAILY MX report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Iron, total [as Fe]DAILY MX report only all year
001Iron, total [as Fe]DAILY MX report only all year
001Iron, dissolved [as Fe]DAILY MX report only all year
001Iron, dissolved [as Fe]DAILY MX report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Manganese, total [as Mn]DAILY MX report only all year
001Manganese, total [as Mn]DAILY MX report only all year
001Nickel, total [as Ni]DAILY MX report only all year
001Nickel, total [as Ni]DAILY MX report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG <= .038 mg/L all year
001Zinc, total [as Zn]DAILY MX report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG <= 1.7 lb/d all year
001Selenium, total [as Se]DAILY MX report only all year
001Selenium, total [as Se]DAILY MX report only all year
001Phenolics, total recoverableDAILY MX report only all year
001Phenolics, total recoverableDAILY MX report only all year
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 <= .05 mg/L May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX <= .05 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Coliform, fecal generalDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 459 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 917 lb/d all year
002Oxygen, dissolved [DO]MO AV MN >= 5.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
002Oxygen, dissolved [DO]MN WK AV >= 6 mg/L Mar, Apr, May, Jun, Jul
002Oxygen, dissolved [DO]MN WK AV >= 4 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
002Oxygen, dissolved [DO]DAILY MN >= 5 mg/L Mar, Apr, May, Jun, Jul
002Oxygen, dissolved [DO]DAILY MN >= 3.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 12 mg/L all year
002Solids, total suspendedDAILY MX <= 24 mg/L all year
002Solids, total suspendedMO AVG <= 550 lb/d all year
002Solids, total suspendedDAILY MX <= 1101 lb/d all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Jan
002Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Feb
002Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Nov
002Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Dec
002Nitrogen, ammonia total [as N]MO AVG <= 2.6 mg/L Mar
002Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Apr
002Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L May
002Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Jun
002Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Jul
002Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Aug
002Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Sep
002Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Oct
002Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Jan
002Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Feb
002Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Nov
002Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Dec
002Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Mar
002Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Apr
002Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L May
002Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Jun
002Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Jul
002Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Aug
002Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Sep
002Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Oct
002Nitrogen, ammonia total [as N]MO AVG <= 183 lb/d Jan
002Nitrogen, ammonia total [as N]MO AVG <= 183 lb/d Feb
002Nitrogen, ammonia total [as N]MO AVG <= 183 lb/d Nov
002Nitrogen, ammonia total [as N]MO AVG <= 183 lb/d Dec
002Nitrogen, ammonia total [as N]MO AVG <= 119 lb/d Mar
002Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Apr
002Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d May
002Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Jun
002Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Jul
002Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Aug
002Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Sep
002Nitrogen, ammonia total [as N]MO AVG <= 69 lb/d Oct
002Nitrogen, ammonia total [as N]DAILY MX <= 367 lb/d Jan
002Nitrogen, ammonia total [as N]DAILY MX <= 367 lb/d Feb
002Nitrogen, ammonia total [as N]DAILY MX <= 367 lb/d Nov
002Nitrogen, ammonia total [as N]DAILY MX <= 367 lb/d Dec
002Nitrogen, ammonia total [as N]DAILY MX <= 367 lb/d Mar
002Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Apr
002Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d May
002Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Jun
002Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Jul
002Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Aug
002Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Sep
002Nitrogen, ammonia total [as N]DAILY MX <= 138 lb/d Oct
002Nitrogen, ammonia total [as N]WKLY AVG <= 6.5 mg/L Mar
002Nitrogen, ammonia total [as N]WKLY AVG <= 298 lb/d Mar
002Phosphorus, total [as P]MO AVG <= 1 mg/L all year
002Phosphorus, total [as P]MO AVG <= 46 lb/d all year
002Zinc, total [as Zn]MO AVG <= .038 mg/L all year
002Zinc, total [as Zn]MO AVG <= 1.7 lb/d all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualDAILY MX <= .05 mg/L May, Jun, Jul, Aug, Sep, Oct
002Chlorine, total residualDAILY MX <= .05 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Coliform, fecal generalDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L all year
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 459 lb/d all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 917 lb/d all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFSolids, total suspendedMO AVG report only all year
INFFlow, in conduit or thru treatment plantMO AVG report only all year
INFFlow, in conduit or thru treatment plantDAILY MX report only all year

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