BLACKFOOT, CITY OF

NPDES permit ID0020044 · Major POTW · administratively continued, expires 2018-08-31 · EPA's file as of 2026-09-19

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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 2018-08-31 and is administratively continued: 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

1values over a limit
0required values missing, on 0 form(s)
0of 12 forms filed late

Last period with anything received: 2026-08-31. Most often over: Phosphorus, total [as P] (1).

Reporting

Reports are due about 10 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (43)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 801 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 1200 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 650 lb/d all year
001Solids, total suspendedWKLY AVG <= 1525 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedANNL AVG <= 397 lb/d Dec
001Nitrogen, ammonia total [as N]MO AVG <= 13.8 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 8.25 mg/L Apr, May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 38.7 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 23.1 mg/L Apr, May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MO AVG <= 587 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 350 lb/d Apr, May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 1650 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 983 lb/d Apr, May, Jun, Jul, Aug, Sep
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MX WK AV report only all year
001Phosphorus, total [as P]MO AVG <= 141 lb/d all year
001Phosphorus, total [as P]WKLY AVG <= 212 lb/d all year
001Phosphorus, total [as P]ANNL AVG <= 38.9 lb/d Dec
001Arsenic, total recoverableINST MAX report only all year
001Nickel, total recoverableINST MAX report only all year
001Silver total recoverableINST MAX report only all year
001Zinc, total recoverableINST MAX report only all year
001Cadmium, total recoverableINST MAX report only all year
001Chromium, total recoverableINST MAX report only all year
001Copper, total recoverableINST MAX report only all year
001E. coli, MTEC-MFMO GEOMN <= 126 #/100mL all year
001E. coli, MTEC-MFINST MAX <= 406 #/100mL all year
001Floating solids, waste or visible foam-visualMO MAX <= 0 N=0;Y=1 all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Mercury, total [as Hg]INST MAX report only all year
001Cyanide, total recoverableINST MAX report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Oil and grease visualMO MAX <= 0 N=0;Y=1 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