WATERLOO WWTF

NPDES permit NE0043311 · Minor POTW · effective, expires 2026-09-30 · 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

24values over a limit
0required values missing, on 0 form(s)
4of 16 forms filed late

Last period with anything received: 2026-06-30. Most often over: Solids, total suspended (11), BOD, carbonaceous [5 day, 20 C] (8), 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 (51)

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 <= 28.39 kg/d all year
001Solids, total suspended7 DA AVG <= 42.58 kg/d all year
001Nitrogen, total [as N]MINIMUM report only all year
001Nitrogen, total [as N]MAXIMUM report only all year
001Nitrogen, ammonia total [as N]MO AVG report only Mar, Apr, May
001Nitrogen, ammonia total [as N]MO AVG <= 13.64 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 33.39 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Mar, Apr, May
001Nitrogen, ammonia total [as N]DAILY MX <= 41.74 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 107.83 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG report only Mar, Apr, May
001Nitrogen, ammonia total [as N]MO AVG <= 9.34 kg/d Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 16.68 kg/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Mar, Apr, May
001Nitrogen, ammonia total [as N]DAILY MX <= 28.59 kg/d Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 53.87 kg/d Jan, Feb, Nov, Dec
001Phosphorus, total [as P]MINIMUM report only all year
001Phosphorus, total [as P]MAXIMUM report only all year
001E. coli, MTEC-MFGEO MEAN <= 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
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 <= 23.66 kg/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 37.85 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
SLGpHVALUE report only all year
SLGSelenium, sludge solidVALUE report only all year
SLGArsenic, sludge tot. dry wt [as As]VALUE report only all year
SLGNitrogen [as NO3] sludge solidVALUE report only all year
SLGMolybdenum, sludge, total, dry weight [as Mo]VALUE report only all year
SLGZinc, sludge, total, dry weight [as Zn]VALUE report only all year
SLGLead, sludge, total, dry weight [as Pb]VALUE report only all year
SLGNickel, sludge, total, dry weight [as Ni]VALUE report only all year
SLGNitrogen, sludge, total, dry weight [as N]VALUE report only all year
SLGMercury, sludge, total, dry weight [as Hg]VALUE report only all year
SLGChromium, sludge, total, dry weight [as Cr]VALUE report only all year
SLGCopper, sludge, total, dry weight [as Cu]VALUE report only all year
SLGCadmium, sludge, total, dry weight [as Cd]VALUE report only all year
SLGSolids, sludge, total, dry weightVALUE report only all year
SLGNitrogen, ammonia, sludge, tot dry wgtVALUE 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