POLO, CITY OF

NPDES permit IL0030449 · Minor POTW · administratively continued, expires 2026-07-31 · 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 2026-07-31 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

0values over a limit
0required values missing, on 0 form(s)
0of 48 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 (59)

OutfallParameterStatisticLimitMonths
002Oxygen, dissolved [DO]MO AV MN >= 5.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
002Oxygen, dissolved [DO]MN WK AV >= 4 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]DAILY MN >= 3.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
002Oxygen, dissolved [DO]DAILY MN >= 5 mg/L Mar, Apr, May, Jun, Jul
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 <= 160 lb/d all year
002Solids, total suspendedDAILY MX <= 320 lb/d all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Mar
002Nitrogen, ammonia total [as N]MO AVG <= 1.4 mg/L Apr, May, Sep, Oct
002Nitrogen, ammonia total [as N]MO AVG <= 1.2 mg/L Jun, Jul, Aug
002Nitrogen, ammonia total [as N]MO AVG <= 2.2 mg/L Jan, Feb, Nov, Dec
002Nitrogen, ammonia total [as N]DAILY MX <= 4.7 mg/L Mar
002Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Apr, May, Sep, Oct
002Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Jun, Jul, Aug
002Nitrogen, ammonia total [as N]DAILY MX <= 5.7 mg/L Jan, Feb, Nov, Dec
002Nitrogen, ammonia total [as N]MO AVG <= 20 lb/d Mar
002Nitrogen, ammonia total [as N]MO AVG <= 19 lb/d Apr, May, Sep, Oct
002Nitrogen, ammonia total [as N]MO AVG <= 16 lb/d Jun, Jul, Aug
002Nitrogen, ammonia total [as N]MO AVG <= 29 lb/d Jan, Feb, Nov, Dec
002Nitrogen, ammonia total [as N]DAILY MX <= 63 lb/d Mar
002Nitrogen, ammonia total [as N]DAILY MX <= 40 lb/d Apr, May, Sep, Oct
002Nitrogen, ammonia total [as N]DAILY MX <= 40 lb/d Jun, Jul, Aug
002Nitrogen, ammonia total [as N]DAILY MX <= 76 lb/d Jan, Feb, Nov, Dec
002Nitrogen, ammonia total [as N]WKLY AVG <= 3.8 mg/L Mar
002Nitrogen, ammonia total [as N]WKLY AVG <= 51 lb/d Mar
002Phosphorus, total [as P]DAILY MX report only 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 all year
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 <= 133 lb/d all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 267 lb/d all year
A01Oxygen, dissolved [DO]DAILY MN report only all year
A01BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
A01BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
A01pHMINIMUM >= 6 SU all year
A01pHMAXIMUM <= 9 SU all year
A01Solids, total suspendedMO AVG <= 30 mg/L all year
A01Solids, total suspendedWKLY AVG <= 45 mg/L all year
A01Nitrogen, ammonia total [as N]DAILY MX report only all year
A01Phosphorus, total [as P]DAILY MX report only all year
A01Chlorine, total residualMO AVG <= .75 mg/L all year
A01Coliform, fecal generalDAILY MX <= 400 #/100mL all year
A01Flow, totalMO TOTAL report only all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFSolids, total suspendedMO 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 plantMO AVG report only all year
INFFlow, in conduit or thru treatment plantDAILY MX 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