GARY, CITY OF

NPDES permit WV0020044 · Minor POTW · effective, expires 2028-09-12 · 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

18values over a limit
300required values missing, on 13 form(s)
5of 21 forms filed late

Last period with anything received: 2026-06-30. Most often over: Iron, total recoverable (7), Flow rate (7), 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 (58)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CMO AVG <= 18 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 9 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CDAILY MX <= 36 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CDAILY MX <= 18 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 112.6 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 56.3 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CDAILY MX <= 225.2 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CDAILY MX <= 112.6 lb/d May, Jun, Jul, Aug, Sep, Oct
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 60 mg/L all year
001Solids, total suspendedMO AVG <= 187.6 lb/d all year
001Solids, total suspendedDAILY MX <= 375.3 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 4.9 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 9.8 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 30.5 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 25 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 61 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 50 lb/d May, Jun, Jul, Aug, Sep, Oct
001Iron, total recoverableMO AVG <= 1.31 mg/L all year
001Iron, total recoverableDAILY MX <= 1.95 mg/L all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableDAILY MX report only all year
001Aluminum, total recoverableMO AVG report only all year
001Aluminum, total recoverableDAILY MX report only all year
001Lead, total recoverableMO AVG report only all year
001Lead, total recoverableDAILY MX report only all year
001Copper, total recoverableMO AVG report only all year
001Copper, 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 residualMO AVG <= .022 mg/L all year
001Chlorine, total residualDAILY MX <= .045 mg/L all year
001Mercury, total [as Hg]MO AVG <= .008 ug/L all year
001Mercury, total [as Hg]DAILY MX <= .022 ug/L all year
001Coliform, fecal generalMO GEOMN <= 200 #/100mL all year
001Coliform, fecal generalDAILY MX <= 400 #/100mL all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
IU01Flow rateMO AVG report only all year
IU01Flow rateDAILY MX <= 160000 gal/d all year
IU01pHINST MIN >= 5 SU all year
IU01pHINST MAX <= 10 SU all year
IU01Solids, total suspendedMO AVG report only all year
IU01Solids, total suspendedDAILY MX <= 400 mg/L all year
IU01Iron, total recoverableMO AVG report only all year
IU01Iron, total recoverableDAILY MX <= 10 mg/L all year
IU01Zinc, total recoverableMO AVG report only all year
IU01Zinc, total recoverableDAILY MX <= .4 mg/L all year
IU01Aluminum, total recoverableMO AVG report only all year
IU01Aluminum, total recoverableDAILY MX <= 5 mg/L all year
IU01Lead, total recoverableMO AVG report only all year
IU01Lead, total recoverableDAILY MX report only all year
IU01Copper, total recoverableMO AVG report only all year
IU01Copper, total recoverableDAILY MX <= .3 mg/L 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