CENTRAL HIGH SCHOOL AND NASH MIDDLE SCHOOL

NPDES permit IL0037206 · Minor NON-POTW · effective, expires 2028-03-31 · EPA's file as of 2026-09-19

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EPA's record, 2025-09-01 to 2026-08-31

34values over a limit
0required values missing, on 0 form(s)
2of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (26), BOD, carbonaceous [5 day, 20 C] (4), Solids, total suspended (4).

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 (118)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO AV MN >= 5.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
001Oxygen, dissolved [DO]MO AV MN >= 5.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
001Oxygen, dissolved [DO]MN WK AV >= 4 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
001Oxygen, dissolved [DO]MN WK AV >= 4 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 >= 6 mg/L Mar, Apr, May, Jun, Jul
001Oxygen, dissolved [DO]DAILY MN >= 3.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
001Oxygen, dissolved [DO]DAILY MN >= 3.5 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 >= 5 mg/L Mar, Apr, May, Jun, Jul
001pHMINIMUM >= 6 SU all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 12 mg/L all year
001Solids, total suspendedMO AVG <= 12 mg/L all year
001Solids, total suspendedMO AVG <= 12 mg/L all year
001Solids, total suspendedMO AVG <= 12 mg/L all year
001Solids, total suspendedDAILY MX <= 24 mg/L all year
001Solids, total suspendedDAILY MX <= 24 mg/L all year
001Solids, total suspendedDAILY MX <= 24 mg/L all year
001Solids, total suspendedDAILY MX <= 24 mg/L all year
001Solids, total suspendedMO AVG <= 2.6 lb/d all year
001Solids, total suspendedMO AVG <= 2.6 lb/d all year
001Solids, total suspendedMO AVG <= 2.6 lb/d all year
001Solids, total suspendedMO AVG <= 2.6 lb/d all year
001Solids, total suspendedDAILY MX <= 5.2 lb/d all year
001Solids, total suspendedDAILY MX <= 5.2 lb/d all year
001Solids, total suspendedDAILY MX <= 5.2 lb/d all year
001Solids, total suspendedDAILY MX <= 5.2 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 1.1 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= 1.1 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= 2.6 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 2.6 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 1.1 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= 1.1 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= 2.6 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 2.6 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 5.2 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 5.2 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 5.7 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 5.7 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 5.7 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 5.7 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 5.2 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 5.2 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 5.7 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 5.7 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 5.7 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 5.7 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= .33 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= .33 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= .24 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= .24 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= .56 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= .56 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= .33 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= .33 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= .24 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= .24 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= .56 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= .56 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 1.1 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 1.1 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 1.2 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 1.2 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 1.2 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 1.2 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 1.1 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 1.1 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 1.2 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 1.2 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 1.2 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 1.2 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 2.8 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= 2.8 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= 3.8 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 3.8 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 3.8 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 3.8 mg/L Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 2.8 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= 2.8 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= .61 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= .61 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= .82 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= .82 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= .82 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= .82 lb/d Mar, Apr, May, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= .61 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= .61 lb/d Jun, Jul, Aug
001Flow, in conduit or thru treatment plantMO AVG 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
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= .05 mg/L all year
001Chlorine, total residualDAILY MX <= .05 mg/L all year
001Coliform, fecal generalDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
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]MO AVG <= 10 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
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]DAILY MX <= 20 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 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 <= 2.2 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 2.2 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 2.2 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 2.2 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 4.3 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 4.3 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 4.3 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 4.3 lb/d 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