Lennox, City of

NPDES permit SD0021768 · Minor POTW · effective, expires 2027-12-31 · 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 18 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among SD permits in EPA's filings — check your permit).

Limits in force (86)

OutfallParameterStatisticLimitMonths
004Temperature, water deg. centigrade30DA AVG report only all year
004Temperature, water deg. centigradeDAILY MX report only all year
004Flow rate30DA AVG report only all year
004Flow rateDAILY MX report only all year
004BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
004BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
004BOD, 5-day, 20 deg. C30DA AVG report only all year
004pHDAILY MN >= 6.5 SU all year
004pHDAILY MX <= 9 SU all year
004Solids, total suspended30DA AVG <= 30 mg/L all year
004Solids, total suspendedMX 7D AV <= 45 mg/L all year
004Solids, total suspended30DA AVG report only all year
004Oil and grease, hexane extr methodDAILY MX <= 10 mg/L all year
004Nitrogen, total [as N]DAILY MX report only all year
004Nitrogen, ammonia total [as N]30DA AVG report only all year
004Nitrogen, ammonia total [as N]DAILY MX report only all year
004Nitrogen, ammonia total [as N]30DA AVG <= 10.5 lb/d Apr
004Nitrogen, ammonia total [as N]30DA AVG <= 17.7 lb/d Feb
004Nitrogen, ammonia total [as N]30DA AVG <= 10 lb/d Nov
004Nitrogen, ammonia total [as N]30DA AVG <= 3.3 lb/d Aug
004Nitrogen, ammonia total [as N]30DA AVG <= 3.7 lb/d Jun
004Nitrogen, ammonia total [as N]30DA AVG <= 18.7 lb/d Jan
004Nitrogen, ammonia total [as N]30DA AVG <= 13.8 lb/d Dec
004Nitrogen, ammonia total [as N]30DA AVG <= 9.8 lb/d Oct
004Nitrogen, ammonia total [as N]30DA AVG <= 3.5 lb/d Jul
004Nitrogen, ammonia total [as N]30DA AVG <= 13.3 lb/d Mar
004Nitrogen, ammonia total [as N]30DA AVG <= 6.3 lb/d May
004Nitrogen, ammonia total [as N]30DA AVG <= 5.1 lb/d Sep
004Nitrogen, ammonia total [as N]DAILY MX <= 12.1 lb/d Apr
004Nitrogen, ammonia total [as N]DAILY MX <= 46.5 lb/d Feb
004Nitrogen, ammonia total [as N]DAILY MX <= 16.3 lb/d Nov
004Nitrogen, ammonia total [as N]DAILY MX <= 13.1 lb/d Aug
004Nitrogen, ammonia total [as N]DAILY MX <= 12.6 lb/d Jun
004Nitrogen, ammonia total [as N]DAILY MX <= 28.3 lb/d Jan
004Nitrogen, ammonia total [as N]DAILY MX <= 23.6 lb/d Dec
004Nitrogen, ammonia total [as N]DAILY MX <= 13.3 lb/d Oct
004Nitrogen, ammonia total [as N]DAILY MX <= 12.1 lb/d Jul
004Nitrogen, ammonia total [as N]DAILY MX <= 18 lb/d Mar
004Nitrogen, ammonia total [as N]DAILY MX <= 11.2 lb/d May
004Nitrogen, ammonia total [as N]DAILY MX <= 16.3 lb/d Sep
004Phosphorus, total [as P]DAILY MX report only all year
004Cyanide, weak acid, dissociableVALUE report only all year
004Cyanide, weak acid, dissociableVALUE report only all year
004Cyanide, total [as CN]VALUE report only all year
004Cyanide, total [as CN]VALUE report only all year
004Hardness, total [as CaCO3]VALUE report only all year
004Hardness, total [as CaCO3]VALUE report only all year
004Arsenic, total recoverableVALUE report only all year
004Arsenic, total recoverableVALUE report only all year
004Selenium, total recoverableVALUE report only all year
004Selenium, total recoverableVALUE report only all year
004Thallium, total recoverableVALUE report only all year
004Thallium, total recoverableVALUE report only all year
004Beryllium, total recoverable [as Be]VALUE report only all year
004Beryllium, total recoverable [as Be]VALUE report only all year
004Nickel, total recoverableVALUE report only all year
004Nickel, total recoverableVALUE report only all year
004Silver total recoverableVALUE report only all year
004Silver total recoverableVALUE report only all year
004Zinc, total recoverableVALUE report only all year
004Zinc, total recoverableVALUE report only all year
004Aluminum, total recoverableVALUE report only all year
004Aluminum, total recoverableVALUE report only all year
004Cadmium, total recoverableVALUE report only all year
004Cadmium, total recoverableVALUE report only all year
004Lead, total recoverableVALUE report only all year
004Lead, total recoverableVALUE report only all year
004Chromium, total recoverableVALUE report only all year
004Chromium, total recoverableVALUE report only all year
004Copper, total recoverableVALUE report only all year
004Copper, total recoverableVALUE report only all year
004Molybdenum, total recoverableVALUE report only all year
004Molybdenum, total recoverableVALUE report only all year
004Antimony, total recoverableVALUE report only all year
004Antimony, total recoverableVALUE report only all year
004PhenolsVALUE report only all year
004PhenolsVALUE report only all year
004E. coli, colony forming units [CFU]30DA GEO <= 630 #/100mL May, Jun, Jul, Aug, Sep
004E. coli, colony forming units [CFU]DAILY MX <= 1178 #/100mL May, Jun, Jul, Aug, Sep
004Toxicity [chronic], Ceriodaphnia dubiaDAILY MX < 2.4 tox chronic all year
004Toxicity [chronic], Pimephales promelas [Fathead Minnow]DAILY MX < 2.4 tox chronic all year
004Mercury, total recoverableVALUE report only all year
004Mercury, total recoverableVALUE report only all year
004BOD, 5-day, percent removalMO AV MN >= 85 % all year
004Solids, suspended percent removalMO AV MN >= 85 % all year
004Oil and grease visualDAILY MX < 1 abst=0;prst=1 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