OREGON, CITY OF

NPDES permit IL0020184 · Minor POTW · effective, expires 2029-10-31 · 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 24 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among IL permits in EPA's filings — check your permit).

Limits in force (35)

OutfallParameterStatisticLimitMonths
009pHMINIMUM >= 6 SU all year
009pHMAXIMUM <= 9 SU all year
009Solids, total suspendedMO AVG <= 30 mg/L all year
009Solids, total suspendedWKLY AVG <= 45 mg/L all year
009Solids, total suspendedMO AVG <= 310 lb/d all year
009Solids, total suspendedWKLY AVG <= 465 lb/d all year
009Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Mar, Apr, May, Sep, Oct
009Nitrogen, ammonia total [as N]MO AVG <= 1.1 mg/L Jun, Jul, Aug
009Nitrogen, ammonia total [as N]MO AVG <= 3.4 mg/L Jan, Feb, Nov, Dec
009Nitrogen, ammonia total [as N]DAILY MX <= 4.3 mg/L Mar, Apr, May, Sep, Oct
009Nitrogen, ammonia total [as N]DAILY MX <= 6.9 mg/L Jun, Jul, Aug
009Nitrogen, ammonia total [as N]DAILY MX <= 6 mg/L Jan, Feb, Nov, Dec
009Nitrogen, ammonia total [as N]MO AVG <= 16 lb/d Mar, Apr, May, Sep, Oct
009Nitrogen, ammonia total [as N]MO AVG <= 11 lb/d Jun, Jul, Aug
009Nitrogen, ammonia total [as N]MO AVG <= 35 lb/d Jan, Feb, Nov, Dec
009Nitrogen, ammonia total [as N]DAILY MX <= 44 lb/d Mar, Apr, May, Sep, Oct
009Nitrogen, ammonia total [as N]DAILY MX <= 71 lb/d Jun, Jul, Aug
009Nitrogen, ammonia total [as N]DAILY MX <= 62 lb/d Jan, Feb, Nov, Dec
009Nitrogen, ammonia total [as N]WKLY AVG <= 3.8 mg/L Mar, Apr, May, Sep, Oct
009Nitrogen, ammonia total [as N]WKLY AVG <= 2.7 mg/L Jun, Jul, Aug
009Nitrogen, ammonia total [as N]WKLY AVG <= 39 lb/d Mar, Apr, May, Sep, Oct
009Nitrogen, ammonia total [as N]WKLY AVG <= 28 lb/d Jun, Jul, Aug
009Flow, in conduit or thru treatment plantMO AVG report only all year
009Flow, in conduit or thru treatment plantDAILY MX report only all year
009Chlorine, total residualDAILY MX <= .05 mg/L Jan, Feb, Mar, Apr, Nov, Dec
009Chlorine, total residualDAILY MX <= .05 mg/L May, Jun, Jul, Aug, Sep, Oct
009Coliform, fecal generalDAILY MX <= 400 #/100mL May, Jun, Jul, Aug, Sep, Oct
009BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
009BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
009BOD, carbonaceous [5 day, 20 C]MO AVG <= 259 lb/d all year
009BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 414 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

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