Crookston city of

NPDES permit MN0021423 · Major POTW · effective, expires 2031-03-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
0required values missing, on 0 form(s)
0of 77 forms filed late

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

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 (96)

OutfallParameterStatisticLimitMonths
D004Oxygen, dissolved [DO]MO MIN report only all year
D004pHMO MIN >= 6 SU all year
D004pHMO MAX <= 9 SU all year
D004Solids, total suspendedMO AVG <= 45 mg/L all year
D004Solids, total suspendedMO MAX report only all year
D004Solids, total suspendedMX WK AV <= 65 mg/L all year
D004Solids, total suspendedMO AVG <= 942.1 kg/d all year
D004Solids, total suspendedMX WK AV <= 1360.8 kg/d all year
D004Nitrogen, total [as N]MO AVG report only all year
D004Nitrogen, ammonia total [as N]MO AVG report only all year
D004Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D004Nitrite + Nitrate total [as N]MO AVG report only all year
D004Phosphorus, total [as P]MO AVG report only all year
D004Phosphorus, total [as P]MO AVG report only all year
D004Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D004Flow, in conduit or thru treatment plantMO AVG report only Jan, Feb, Jul, Aug
D004Flow, in conduit or thru treatment plantMO AVG report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D004Flow, in conduit or thru treatment plantMO MAX report only Jan, Feb, Jul, Aug
D004Flow, in conduit or thru treatment plantMO MAX report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D004Flow, in conduit or thru treatment plantMO TOTAL report only Jan, Feb, Jul, Aug
D004Flow, in conduit or thru treatment plantMO TOTAL report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D004Solids, total dissolvedMO AVG report only all year
D004Mercury, dissolved [as Hg]MO MAX report only all year
D004Mercury, total [as Hg]MO MAX report only all year
D004BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D004BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D004BOD, carbonaceous [5 day, 20 C]MO AVG <= 523.4 kg/d all year
D004BOD, carbonaceous [5 day, 20 C]MX WK AV <= 837.4 kg/d all year
D005Oxygen, dissolved [DO]MO MIN report only all year
D005pHMO MIN >= 6 SU all year
D005pHMO MAX <= 9 SU all year
D005Solids, total suspendedMO AVG <= 45 mg/L all year
D005Solids, total suspendedMO MAX report only all year
D005Solids, total suspendedMX WK AV <= 65 mg/L all year
D005Solids, total suspendedMO AVG <= 568 kg/d all year
D005Solids, total suspendedMX WK AV <= 820.5 kg/d all year
D005Nitrogen, total [as N]MO AVG report only all year
D005Nitrogen, ammonia total [as N]MO AVG report only all year
D005Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D005Nitrite + Nitrate total [as N]MO AVG report only all year
D005Phosphorus, total [as P]MO AVG report only all year
D005Phosphorus, total [as P]MO AVG report only all year
D005Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D005Flow, in conduit or thru treatment plantMO AVG report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D005Flow, in conduit or thru treatment plantMO AVG report only Jan, Feb, Jul, Aug
D005Flow, in conduit or thru treatment plantMO MAX report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D005Flow, in conduit or thru treatment plantMO MAX report only Jan, Feb, Jul, Aug
D005Flow, in conduit or thru treatment plantMO TOTAL report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D005Flow, in conduit or thru treatment plantMO TOTAL report only Jan, Feb, Jul, Aug
D005Solids, total dissolvedMO AVG report only all year
D005Mercury, dissolved [as Hg]MO MAX report only all year
D005Mercury, total [as Hg]MO MAX report only all year
D005BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D005BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D005BOD, carbonaceous [5 day, 20 C]MO AVG <= 315.6 kg/d all year
D005BOD, carbonaceous [5 day, 20 C]MX WK AV <= 504.9 kg/d all year
D006Oxygen, dissolved [DO]MO MIN report only all year
D006pHMO MIN >= 6 SU all year
D006pHMO MAX <= 9 SU all year
D006Solids, total suspendedMO AVG <= 45 mg/L all year
D006Solids, total suspendedMX WK AV <= 65 mg/L all year
D006Solids, total suspendedMO MAX report only all year
D006Solids, total suspendedMO AVG <= 565.3 kg/d all year
D006Solids, total suspendedMX WK AV <= 816.5 kg/d all year
D006Nitrogen, total [as N]MO AVG report only all year
D006Nitrogen, ammonia total [as N]MO AVG report only all year
D006Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D006Nitrite + Nitrate total [as N]MO AVG report only all year
D006Phosphorus, total [as P]MO AVG report only all year
D006Phosphorus, total [as P]MO AVG report only all year
D006Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D006Flow, in conduit or thru treatment plantMO AVG report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D006Flow, in conduit or thru treatment plantMO AVG report only Jan, Feb, Jul, Aug
D006Flow, in conduit or thru treatment plantMO MAX report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D006Flow, in conduit or thru treatment plantMO MAX report only Jan, Feb, Jul, Aug
D006Flow, in conduit or thru treatment plantMO TOTAL report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D006Flow, in conduit or thru treatment plantMO TOTAL report only Jan, Feb, Jul, Aug
D006Solids, total dissolvedMO AVG report only all year
D006Mercury, dissolved [as Hg]MO MAX report only all year
D006Mercury, total [as Hg]MO MAX report only all year
D006BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D006BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D006BOD, carbonaceous [5 day, 20 C]MO AVG <= 314.1 kg/d all year
D006BOD, carbonaceous [5 day, 20 C]MX WK AV <= 502.5 kg/d all year
S017Precipitation, total defined period/inMO TOTAL report only all year
S017pHMO MIN report only Mar, Jun, Sep, Dec
S017pHQB report only Mar, Jun, Sep, Dec
S017Solids, total suspendedQRTR AVG report only Mar, Jun, Sep, Dec
S017Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S017Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S017Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S017Phosphorus, total [as P]QRTR AVG report only Mar, Jun, Sep, Dec
S017Flow, in conduit or thru treatment plantMO AVG report only all year
S017Flow, in conduit or thru treatment plantMO MAX report only all year
S017Flow, in conduit or thru treatment plantMO TOTAL report only all year
S017BOD, carbonaceous [5 day, 20 C]QRTR AVG report only Mar, Jun, Sep, Dec

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