Royalton city of

NPDES permit MN0020460 · Minor POTW · expired, expires 2025-05-31 · 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 2025-05-31 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
0required values missing, on 0 form(s)
0of 33 forms filed late

Last period with anything received: 2026-07-31.

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 (42)

OutfallParameterStatisticLimitMonths
D001Oxygen, dissolved [DO]MO MIN report only all year
D001pHMO MIN >= 6 SU all year
D001pHMO MAX <= 9 SU all year
D001Solids, total suspendedMO AVG <= 45 mg/L all year
D001Solids, total suspendedMX WK AV <= 60 mg/L all year
D001Solids, total suspendedMO AVG <= 29.4 kg/d all year
D001Solids, total suspendedMX WK AV <= 42.5 kg/d all year
D001Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D001Nitrogen, ammonia total [as N]MO AVG <= 17 mg/L Jun, Jul, Aug, Sep
D001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D001Nitrogen, ammonia total [as N]MO AVG <= 11.1 kg/d Jun, Jul, Aug, Sep
D001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D001Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D001Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
D001Phosphorus, total [as P]ANNL TOT <= 239 kg/yr all year
D001Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL all year
D001Flow, in conduit or thru treatment plantMO AVG report only all year
D001Flow, in conduit or thru treatment plantMO MAX report only all year
D001Flow, in conduit or thru treatment plantMO TOTAL report only all year
D001Chlorine, total residualDAILY MX <= .038 mg/L all year
D001Solids, total dissolvedMO AVG report only Mar, Sep
D001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D001BOD, carbonaceous [5 day, 20 C]MO AVG <= 16.4 kg/d all year
D001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 26.1 kg/d all year
D001BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D001Solids, suspended percent removalMO AV MN >= 85 % all year
S002Precipitation, total defined period/inMO TOTAL report only all year
S002pHMO MIN report only all year
S002pHMO MAX report only all year
S002Solids, total suspendedMO AVG report only all year
S002Solids, total suspendedMO MAX report only all year
S002Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S002Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S002Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S002Phosphorus, total [as P]MO AVG report only all year
S002Flow, in conduit or thru treatment plantMO AVG report only all year
S002Flow, in conduit or thru treatment plantMO MAX report only all year
S002Flow, in conduit or thru treatment plantMO TOTAL report only all year
S002BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S002BOD, 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