Monticello city of

NPDES permit MN0020567 · Major POTW · effective, expires 2031-07-31 · 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

3values over a limit
1required values missing, on 1 form(s)
0of 39 forms filed late

Last period with anything received: 2026-07-31. Most often over: Phosphorus, total [as P] (3).

Reporting

Reports are due about 45 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (50)

OutfallParameterStatisticLimitMonths
D029Specific conductanceMO MAX report only all year
D029Oxygen, dissolved [DO]MO MIN report only all year
D029pHMO MIN >= 6 SU all year
D029pHMO MAX <= 9 SU all year
D029Solids, total suspendedMO AVG report only Jan, Mar, May, Jul, Sep, Nov
D029Solids, total suspendedMO AVG <= 30 mg/L all year
D029Solids, total suspendedDAILY MX report only Jan, Mar, May, Jul, Sep, Nov
D029Solids, total suspendedMX WK AV <= 45 mg/L all year
D029Solids, total suspendedMO AVG <= 136 kg/d all year
D029Solids, total suspendedMX WK AV <= 204 kg/d all year
D029Nitrogen, total [as N]MO AVG report only all year
D029Nitrogen, ammonia total [as N]MO AVG report only all year
D029Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D029Nitrite + Nitrate total [as N]MO AVG report only all year
D029Phosphorus, total [as P]MO AVG report only all year
D029Phosphorus, total [as P]MO AVG report only all year
D029Phosphorus, total [as P]ANNL TOT <= 2608 kg/yr all year
D029Chloride [as Cl]MO MAX report only all year
D029Sulfate, total [as SO4]MO MAX report only all year
D029Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D029Flow, in conduit or thru treatment plantMO AVG report only all year
D029Flow, in conduit or thru treatment plantMO MAX report only all year
D029Flow, in conduit or thru treatment plantMO TOTAL report only all year
D029Chlorine, total residualDAILY MX <= .038 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
D029Solids, total dissolvedMO MAX report only all year
D029Mercury, dissolved [as Hg]MO AVG report only Jan, Mar, May, Jul, Sep, Nov
D029Mercury, dissolved [as Hg]DAILY MX report only Jan, Mar, May, Jul, Sep, Nov
D029Mercury, total [as Hg]MO AVG <= 10 ng/L Jan, Mar, May, Jul, Sep, Nov
D029Mercury, total [as Hg]DAILY MX <= 17 ng/L Jan, Mar, May, Jul, Sep, Nov
D029BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D029BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D029BOD, carbonaceous [5 day, 20 C]MO AVG <= 114 kg/d all year
D029BOD, carbonaceous [5 day, 20 C]MX WK AV <= 182 kg/d all year
D029BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D029Solids, suspended percent removalMO AV MN >= 85 % all year
S030Precipitation, total defined period/inMO TOTAL report only all year
S030pHMO MIN report only all year
S030pHMO MAX report only all year
S030Solids, total suspendedMO AVG report only all year
S030Solids, total suspendedMO MAX report only all year
S030Nitrogen, total [as N]MO AVG report only all year
S030Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
S030Nitrite + Nitrate total [as N]MO AVG report only all year
S030Phosphorus, total [as P]MO AVG report only all year
S030Flow, in conduit or thru treatment plantMO AVG report only all year
S030Flow, in conduit or thru treatment plantMO MAX report only all year
S030Flow, in conduit or thru treatment plantMO TOTAL report only all year
S030Mercury, total [as Hg]MO AVG report only Jan, Mar, May, Jul, Sep, Nov
S030BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S030BOD, 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