POST FALLS, CITY OF

NPDES permit ID0025852 · Major POTW · effective, expires 2028-12-31 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 17 forms filed late

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

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among ID permits in EPA's filings — check your permit).

Limits in force (108)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMO AVG report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001Oxygen, dissolved [DO]MO AVG report only all year
001Oxygen, dissolved [DO]INST MIN report only all year
001Oxygen, dissolved [DO]MO AVG report only all year
001Oxygen, dissolved [DO]INST MIN report only all year
001pHINST MIN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001pHINST MIN report only all year
001pHINST MAX report only all year
001pHINST MIN report only all year
001pHINST MAX report only all year
001Alkalinity, total [as CaCO3]MO AVG report only all year
001Alkalinity, total [as CaCO3]DAILY MX report only all year
001Alkalinity, total [as CaCO3]MO AVG report only all year
001Solids, total suspendedMO AVG <= 30 mg/g all year
001Solids, total suspendedWKLY AVG <= 45 mg/g all year
001Solids, total suspendedMO AVG <= 1303 lb/d all year
001Solids, total suspendedWKLY AVG <= 1955 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]AVERAGE <= 255 lb/d Oct
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]AVERAGE <= 3.19 lb/d Oct
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Carbon, dissolved organic [as C]MO AVG report only all year
001Hardness, total [as CaCO3]MO AVG report only all year
001Hardness, total [as CaCO3]DAILY MX report only all year
001Hardness, total [as CaCO3]MO AVG report only all year
001Hardness, total [as CaCO3]DAILY MX report only all year
001Calcium, dissolved [as Ca]MO AVG report only all year
001Magnesium, dissolved [as Mg]MO AVG report only all year
001Sodium, dissolved [as Na]MO AVG report only all year
001Potassium, dissolved [as K]MO AVG report only all year
001Chloride [as Cl]MO AVG report only all year
001Sulfate, dissolved [as SO4]MO AVG report only all year
001Cadmium, total [as Cd]MO AVG report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Copper, total [as Cu]MO AVG report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Copper, total [as Cu]MO AVG report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Lead, total [as Pb]MO AVG report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Lead, total [as Pb]MO AVG report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Silver, total [as Ag]MO AVG report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Zinc, dissolved [as Zn]MO AVG report only all year
001Zinc, dissolved [as Zn]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG <= 82.39 ug/L all year
001Zinc, total [as Zn]DAILY MX <= 120.23 ug/L all year
001Zinc, total [as Zn]MO AVG <= 3.58 lb/d all year
001Zinc, total [as Zn]DAILY MX <= 5.22 lb/d all year
001Chlorophyll AMO AVG report only all year
001Chlorophyll ADAILY MX report only all year
001Chlorophyll AMO AVG report only all year
001Chlorophyll ADAILY MX report only all year
001Nitrogen, total KjeldahlMO AVG report only all year
001Nitrogen, total KjeldahlDAILY MX report only all year
001Chlorine, total residualMO AVG <= 127 ug/L Jul, Aug, Sep
001Chlorine, total residualMO AVG <= 244 ug/L Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001Chlorine, total residualDAILY MX <= 294 ug/L Jul, Aug, Sep
001Chlorine, total residualDAILY MX <= 565 ug/L Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001Chlorine, total residualMO AVG <= 5.3 lb/d Jul, Aug, Sep
001Chlorine, total residualMO AVG <= 10.2 lb/d Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001Chlorine, total residualDAILY MX <= 13.6 lb/d Jul, Aug, Sep
001Chlorine, total residualDAILY MX <= 23.6 lb/d Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001E. coliMO GEOMN <= 126 #/100mL all year
001E. coliINST MAX <= 406 #/100mL 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
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001PER-AND POLYFLUOROALKYL SUBSTANCESDAILY MX report only all year
001EnterococciMO GEOMN <= 35 #/100mL all year
001EnterococciINST MAX <= 130 #/100mL all year
001Polychlorinated biphenyls [PCB] pg/LDAILY MX report only Feb, May, Aug, Nov
001Polychlorinated biphenyls [PCB] pg/LDAILY MX report only Feb, May, Aug, Nov
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 369 lb/d Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]AVERAGE <= 255 lb/d Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 1086 lb/d Jan, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 679 lb/d Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 1738 lb/d Jan, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AVG <= 16.5 Ratio (alert) Feb, May, Aug, Nov
001IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 16.5 Ratio (alert) Feb, May, Aug, Nov
001IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AVG <= 16.5 Ratio (alert) Feb, May, Aug, Nov
001IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasDAILY MX <= 16.5 Ratio (alert) Feb, May, Aug, Nov

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