Hutchinson city of

NPDES permit MN0055832 · Major NON-POTW · effective, expires 2026-10-31 · 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
5required values missing, on 1 form(s)
0of 79 forms filed late

Last period with anything received: 2026-07-31. 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 (79)

OutfallParameterStatisticLimitMonths
D069Specific conductanceMO MAX report only all year
D069Oxygen, dissolved [DO]MO MIN >= 7 mg/L all year
D069pHMO MIN >= 6 SU all year
D069pHMO MAX <= 9 SU all year
D069Bicarbonate ion- [as HCO3]MO MAX report only all year
D069Solids, total suspendedMO AVG report only May, Sep
D069Solids, total suspendedMO AVG <= 30 mg/L all year
D069Solids, total suspendedDAILY MX report only May, Sep
D069Solids, total suspendedMX WK AV <= 45 mg/L all year
D069Solids, total suspendedMO AVG <= 484 kg/d all year
D069Solids, total suspendedMX WK AV <= 726 kg/d all year
D069Nitrogen, total [as N]MO AVG report only all year
D069Nitrogen, ammonia total [as N]MO AVG <= 6.2 mg/L Jan, Feb, Mar, Dec
D069Nitrogen, ammonia total [as N]MO AVG <= 3.5 mg/L Oct, Nov
D069Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L Jun, Jul, Aug, Sep
D069Nitrogen, ammonia total [as N]MO AVG <= 2 mg/L Apr, May
D069Nitrogen, ammonia total [as N]MO AVG <= 127 kg/d Jan, Feb, Mar, Dec
D069Nitrogen, ammonia total [as N]MO AVG <= 72 kg/d Oct, Nov
D069Nitrogen, ammonia total [as N]MO AVG <= 21 kg/d Jun, Jul, Aug, Sep
D069Nitrogen, ammonia total [as N]MO AVG <= 41.1 kg/d Apr, May
D069Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D069Nitrite + Nitrate total [as N]MO AVG report only all year
D069Phosphorus, total [as P]MO AVG <= .32 mg/L Jun, Jul, Aug, Sep
D069Phosphorus, total [as P]MO AVG <= 1 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D069Phosphorus, total [as P]ANNL TOT <= 6001 kg/yr all year
D069Calcium, total [as Ca]MO MAX report only all year
D069Magnesium, total [as Mg]MO MAX report only all year
D069Sodium, total [as Na]MO MAX report only all year
D069Potassium, total [as K]MO MAX report only all year
D069Chloride [as Cl]MO MAX report only all year
D069Sulfate, total [as SO4]MO MAX report only all year
D069Copper, total [as Cu]MO AVG report only Jan, Apr, Jul, Oct
D069Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D069Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D069Flow, in conduit or thru treatment plantMO AVG report only all year
D069Flow, in conduit or thru treatment plantMO MAX report only all year
D069Flow, in conduit or thru treatment plantMO TOTAL report only all year
D069Solids, total dissolvedMO MAX report only all year
D069Mercury, dissolved [as Hg]MO AVG report only May, Sep
D069Mercury, dissolved [as Hg]DAILY MX report only May, Sep
D069Mercury, total [as Hg]MO AVG <= 10.1 ng/L May, Sep
D069Mercury, total [as Hg]DAILY MX <= 18.7 ng/L May, Sep
D069BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
D069BOD, carbonaceous [5 day, 20 C]MO AVG <= 5 mg/L all year
D069BOD, carbonaceous [5 day, 20 C]MX WK AV <= 15 mg/L all year
D069BOD, carbonaceous [5 day, 20 C]MX WK AV <= 7.5 mg/L all year
D069BOD, carbonaceous [5 day, 20 C]MO AVG <= 205 kg/d all year
D069BOD, carbonaceous [5 day, 20 C]MO AVG <= 103 kg/d all year
D069BOD, carbonaceous [5 day, 20 C]MX WK AV <= 154 kg/d all year
D069BOD, carbonaceous [5 day, 20 C]MX WK AV <= 308 kg/d all year
D069BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D069Solids, suspended percent removalMO AV MN >= 85 % all year
S072Precipitation, total defined period/inMO TOTAL report only all year
S072pHMO MIN report only all year
S072pHMO MAX report only all year
S072Solids, total suspendedMO AVG report only all year
S072Solids, total suspendedMO MAX report only all year
S072Nitrogen, total [as N]MO AVG report only all year
S072Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
S072Nitrite + Nitrate total [as N]MO AVG report only all year
S072Phosphorus, total [as P]MO AVG report only all year
S072Flow, in conduit or thru treatment plantMO AVG report only all year
S072Flow, in conduit or thru treatment plantMO MAX report only all year
S072Flow, in conduit or thru treatment plantMO TOTAL report only all year
S072Mercury, total [as Hg]MO AVG report only May, Sep
S072BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S072BOD, carbonaceous [5 day, 20 C]MO MAX report only all year
W070Temperature, water deg. centigradeMO MAX report only all year
W070Stream flow, instantaneousMO MIN report only all year
W070Oxygen, dissolved [DO]MO MIN report only all year
W070pHMO MAX report only all year
W070Nitrogen, ammonia total [as N]MO MAX report only all year
W070Nitrogen, ammonia, tot unionized [as N]MO MAX report only all year
W070Effluent dilution ratioMO MIN report only all year
W071Temperature, water deg. centigradeMO MAX report only all year
W071Oxygen, dissolved [DO]MO MIN report only all year
W071pHMO MAX report only all year
W071Nitrogen, ammonia total [as N]MO MAX report only all year
W071Nitrogen, ammonia, tot unionized [as N]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