Lewiston city of

NPDES permit MN0023965 · Minor POTW · effective, expires 2028-07-31 · 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

1values over a limit
0required values missing, on 0 form(s)
0of 48 forms filed late

Last period with anything received: 2026-08-31. Most often over: Oxygen, dissolved [DO] (1).

Reporting

Reports are due about 21 days after each monitoring period ends (the most common figure among MN permits in EPA's filings — check your permit).

Limits in force (61)

OutfallParameterStatisticLimitMonths
D012Specific conductanceMO MAX report only Mar, Sep
D012Oxygen, dissolved [DO]MO MIN >= 6 mg/L all year
D012pHMO MIN >= 6 SU all year
D012pHMO MAX <= 9 SU all year
D012Bicarbonate ion- [as HCO3]MO MAX report only Mar, Sep
D012Solids, total suspendedMO AVG <= 30 mg/L all year
D012Solids, total suspendedMX WK AV <= 45 mg/L all year
D012Solids, total suspendedMO MAX report only Jul
D012Solids, total suspendedMO AVG <= 39.7 kg/d all year
D012Solids, total suspendedMX WK AV <= 59.6 kg/d all year
D012Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D012Nitrogen, ammonia total [as N]MO AVG <= 2.5 mg/L Apr, May
D012Nitrogen, ammonia total [as N]MO AVG <= 3.3 mg/L Jun, Jul, Aug, Sep
D012Nitrogen, ammonia total [as N]MO AVG <= 11 mg/L Oct, Nov
D012Nitrogen, ammonia total [as N]MO AVG <= 7.4 mg/L Jan, Feb, Mar, Dec
D012Nitrogen, ammonia total [as N]MO AVG <= 3.3 kg/d Apr, May
D012Nitrogen, ammonia total [as N]MO AVG <= 4.4 kg/d Jun, Jul, Aug, Sep
D012Nitrogen, ammonia total [as N]MO AVG <= 14.6 kg/d Oct, Nov
D012Nitrogen, ammonia total [as N]MO AVG <= 9.8 kg/d Jan, Feb, Mar, Dec
D012Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D012Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D012Phosphorus, total [as P]1D <= 1 mg/L all year
D012Phosphorus, total [as P]MO AVG report only all year
D012Phosphorus, total [as P]MO AVG report only all year
D012Phosphorus, total [as P]ANNL TOT <= 484 kg/yr all year
D012Calcium, total [as Ca]MO MAX report only Mar, Sep
D012Magnesium, total [as Mg]MO MAX report only Mar, Sep
D012Sodium, total [as Na]MO MAX report only Mar, Sep
D012Potassium, total [as K]MO MAX report only Mar, Sep
D012Chloride [as Cl]MO AVG report only all year
D012Chloride [as Cl]DAILY MX <= 626 mg/L all year
D012Sulfate, total [as SO4]MO MAX report only Mar, Sep
D012Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only Mar, Sep
D012Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL all year
D012Flow, in conduit or thru treatment plantMO AVG report only all year
D012Flow, in conduit or thru treatment plantMO MAX report only all year
D012Flow, in conduit or thru treatment plantMO TOTAL report only all year
D012Chlorine, total residualDAILY MX <= .038 mg/L all year
D012Solids, total dissolvedMO MAX report only Mar, Sep
D012Mercury, dissolved [as Hg]MO MAX report only Jul
D012Mercury, total [as Hg]MO MAX report only Jul
D012BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L all year
D012BOD, carbonaceous [5 day, 20 C]MO MAX <= 25 mg/L all year
D012BOD, carbonaceous [5 day, 20 C]MO AVG <= 19.9 kg/d all year
D012BOD, carbonaceous [5 day, 20 C]MX WK AV <= 33.1 kg/d all year
D012BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D012Solids, suspended percent removalMO AV MN >= 85 % all year
S018Precipitation, total defined period/inMO TOTAL report only all year
S018pHMO MIN report only all year
S018pHMO MAX report only all year
S018Solids, total suspendedMO AVG report only all year
S018Solids, total suspendedMO MAX report only all year
S018Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S018Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S018Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S018Phosphorus, total [as P]MO AVG report only all year
S018Flow, in conduit or thru treatment plantMO AVG report only all year
S018Flow, in conduit or thru treatment plantMO MAX report only all year
S018Flow, in conduit or thru treatment plantMO TOTAL report only all year
S018BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S018BOD, carbonaceous [5 day, 20 C]MO MAX 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