SID #128, DOUGLAS COUNTY, TWILIGHT HILLS WWTF

NPDES permit NE0113077 · Minor POTW · effective, expires 2027-03-31 · EPA's file as of 2026-09-19

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

11values over a limit
0required values missing, on 0 form(s)
0of 17 forms filed late

Last period with anything received: 2026-08-31. Most often over: Nitrogen, ammonia total [as N] (4), BOD, carbonaceous [5 day, 20 C] (3), E. coli, MTEC-MF (2).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (38)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspended7 DA AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 5.67 kg/d all year
001Solids, total suspended7 DA AVG <= 8.51 kg/d all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 25.57 mg/L Mar, Apr, May
001Nitrogen, ammonia total [as N]MO AVG <= 19.88 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 51.3 mg/L Mar, Apr, May
001Nitrogen, ammonia total [as N]DAILY MX <= 39.88 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= .44 kg/d Mar, Apr, May
001Nitrogen, ammonia total [as N]MO AVG <= .34 kg/d Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= .87 kg/d Mar, Apr, May
001Nitrogen, ammonia total [as N]DAILY MX <= .68 kg/d Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Nov, Dec
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001E. coli, MTEC-MFMO GEOMN <= 126 #/100mL May, Jun, Jul, Aug, Sep
001E. coli, MTEC-MFMAXIMUM <= 298 #/100mL May, Jun, Jul, Aug, Sep
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 <= .05 mL/L all year
001Chlorine, total residualDAILY MX <= .1 mL/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 4.73 kg/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 7.57 kg/d all year
INFpHVALUE report only all year
INFSolids, total suspendedVALUE report only all year
INFFlow, in conduit or thru treatment plantVALUE report only all year
INFBOD, carbonaceous [5 day, 20 C]VALUE 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