Cold Spring city of

NPDES permit MN0023094 · Major POTW · expired, expires 2023-01-31 · 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.

This permit expired on 2023-01-31 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
9required values missing, on 9 form(s)
0of 58 forms filed late

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

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 (73)

OutfallParameterStatisticLimitMonths
D028Specific conductanceMO MAX report only all year
D028Oxygen, dissolved [DO]MO MIN report only Apr, May
D028Oxygen, dissolved [DO]MO MIN >= 6 mg/L Jan, Feb, Mar, Jun, Jul, Aug, Sep, Oct, Nov, Dec
D028pHMO MIN >= 6 SU all year
D028pHMO MAX <= 9 SU all year
D028Bicarbonate ion- [as HCO3]MO MAX report only all year
D028Solids, total suspendedMO AVG <= 30 mg/L all year
D028Solids, total suspendedMX WK AV <= 45 mg/L all year
D028Solids, total suspendedMO MAX report only May, Sep
D028Solids, total suspendedMO AVG <= 81.7 kg/d all year
D028Solids, total suspendedMX WK AV <= 122.5 kg/d all year
D028Nitrogen, total [as N]MO AVG report only all year
D028Nitrogen, ammonia total [as N]MO AVG <= 14 mg/L Oct, Nov
D028Nitrogen, ammonia total [as N]MO AVG <= 3 mg/L Jun, Jul, Aug, Sep
D028Nitrogen, ammonia total [as N]MO AVG <= 5 mg/L Jan, Feb, Mar, Dec
D028Nitrogen, ammonia total [as N]MO AVG report only Apr, May
D028Nitrogen, ammonia total [as N]MO AVG <= 94.9 kg/d Oct, Nov
D028Nitrogen, ammonia total [as N]MO AVG <= 20.3 kg/d Jun, Jul, Aug, Sep
D028Nitrogen, ammonia total [as N]MO AVG <= 33.9 kg/d Jan, Feb, Mar, Dec
D028Nitrogen, ammonia total [as N]MO AVG report only Apr, May
D028Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D028Nitrite + Nitrate total [as N]MO AVG report only all year
D028Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D028Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D028Phosphorus, total [as P]1D <= 1 mg/L all year
D028Phosphorus, total [as P]MO AVG <= 4.1 kg/d Jun, Jul, Aug, Sep
D028Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D028Phosphorus, total [as P]ANNL TOT <= 1978 kg/yr all year
D028Calcium, total [as Ca]MO MAX report only all year
D028Magnesium, total [as Mg]MO MAX report only all year
D028Sodium, total [as Na]MO MAX report only all year
D028Potassium, total [as K]MO MAX report only all year
D028Chloride [as Cl]MO MAX report only all year
D028Sulfate, total [as SO4]MO MAX report only all year
D028Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D028Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL all year
D028Flow, in conduit or thru treatment plantMO AVG report only all year
D028Flow, in conduit or thru treatment plantMO MAX report only all year
D028Flow, in conduit or thru treatment plantMO TOTAL report only all year
D028Solids, total dissolvedMO MAX report only all year
D028Mercury, dissolved [as Hg]MO MAX report only May, Sep
D028Mercury, total [as Hg]MO MAX report only May, Sep
D028BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L all year
D028BOD, carbonaceous [5 day, 20 C]MX WK AV <= 25 mg/L all year
D028BOD, carbonaceous [5 day, 20 C]MO AVG <= 101.6 kg/d all year
D028BOD, carbonaceous [5 day, 20 C]MX WK AV <= 169.4 kg/d all year
D028BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D028BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D028Solids, suspended percent removalMO AV MN >= 85 % all year
D036Solids, total suspendedANNL AVG report only all year
D036BOD, carbonaceous [5 day, 20 C]ANNL AVG report only all year
D037Solids, total suspendedANNL AVG report only all year
D037BOD, carbonaceous [5 day, 20 C]ANNL AVG report only all year
D038Solids, total suspendedANNL AVG report only all year
D038BOD, carbonaceous [5 day, 20 C]ANNL AVG report only all year
D039Solids, total suspendedANNL AVG report only all year
D039BOD, carbonaceous [5 day, 20 C]ANNL AVG report only all year
D040Solids, total suspendedANNL AVG report only all year
D040BOD, carbonaceous [5 day, 20 C]ANNL AVG report only all year
S033Precipitation, total defined period/inMO TOTAL report only all year
S033pHMO MIN report only all year
S033pHMO MAX report only all year
S033Solids, total suspendedMO AVG report only all year
S033Solids, total suspendedMO MAX report only all year
S033Nitrogen, total [as N]MO AVG report only all year
S033Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
S033Nitrite + Nitrate total [as N]MO AVG report only all year
S033Phosphorus, total [as P]MO AVG report only all year
S033Flow, in conduit or thru treatment plantMO AVG report only all year
S033Flow, in conduit or thru treatment plantMO MAX report only all year
S033Flow, in conduit or thru treatment plantMO TOTAL report only all year
S033BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S033BOD, 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