Aspen Consolidated Sanitation District

NPDES permit CO0026387 · Major POTW · effective, expires 2031-04-30 · 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 34 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (213)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedMX 7D AV <= 45 mg/L all year
001Nitrogen, total [as N]ANNL MEDN <= 26 mg/L all year
001Nitrogen, ammonia total [as N]30DA AVG <= 9.7 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 13 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 13 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 8.9 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 10 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 9.9 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 13 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 17 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 30 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 20 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 17 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 15 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 20 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 22 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 23 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 20 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 20 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 20 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 24 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 24 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 36 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 27 mg/L Sep
001Nitrogen, ammonia total [as N]ROLL AVG <= 9 mg/L Jan
001Nitrogen, ammonia total [as N]ROLL AVG <= 9.1 mg/L Feb
001Nitrogen, ammonia total [as N]ROLL AVG <= 6.6 mg/L Mar
001Nitrogen, ammonia total [as N]ROLL AVG <= 6.8 mg/L Apr
001Nitrogen, ammonia total [as N]ROLL AVG <= 8.6 mg/L May
001Nitrogen, ammonia total [as N]ROLL AVG <= 11 mg/L Jun
001Nitrogen, ammonia total [as N]ROLL AVG <= 8.3 mg/L Jul
001Nitrogen, ammonia total [as N]ROLL AVG <= 6.4 mg/L Aug
001Nitrogen, ammonia total [as N]ROLL AVG <= 6.4 mg/L Sep
001Nitrogen, ammonia total [as N]ROLL AVG <= 6.4 mg/L Oct
001Nitrogen, ammonia total [as N]ROLL AVG <= 6.1 mg/L Nov
001Nitrogen, nitrite total [as N]30DA AVG <= .8 mg/L all year
001Nitrogen, inorganic totalDAILY MX <= 145 mg/L all year
001Phosphorus, total [as P]ANNL MEDN <= 2.7 mg/L all year
001Cyanide, weak acid, dissociableDAILY MX <= 73 ug/L all year
001Cyanide, total [as CN]DAILY MX report only all year
001Chloride [as Cl]30DA AVG <= 4069 mg/L all year
001Arsenic, total recoverable30DA AVG <= 2.7 ug/L all year
001Arsenic, total recoverableROLL AVG <= 2.7 ug/L all year
001Iron, total recoverable30DA AVG report only all year
001Arsenic, total [as As]DAILY MX report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Chromium, total [as Cr]30DA AVG report only all year
001Chromium, total [as Cr]DAILY MX report only all year
001Chromium, total [as Cr]DAILY MX report only all year
001Chromium, total [as Cr]ROLL AVG report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Molybdenum, total [as Mo]DAILY MX report only all year
001Nickel, total [as Ni]DAILY MX report only all year
001Nickel, total recoverable30DA AVG report only all year
001Nickel, total recoverableROLL AVG report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Aluminum, total recoverable30DA AVG <= 21077 ug/L all year
001Aluminum, total recoverableDAILY MX report only all year
001Cadmium, total recoverableDAILY MX report only all year
001Cadmium, total recoverableROLL AVG report only all year
001Lead, total recoverableDAILY MX report only all year
001Lead, total recoverableROLL AVG report only all year
001Molybdenum, total recoverable30DA AVG report only all year
001Selenium, total [as Se]DAILY MX report only all year
001Zinc, potentially dissolved30DA AVG report only all year
001Zinc, potentially dissolvedDAILY MX report only all year
001Silver, potentially dissolved30DA AVG <= 4.3 ug/L all year
001Silver, potentially dissolvedDAILY MX report only all year
001Silver, potentially dissolvedROLL AVG <= .64 ug/L all year
001Copper, potentially dissolved30DA AVG report only all year
001Copper, potentially dissolvedDAILY MX report only all year
001Copper, potentially dissolvedROLL AVG report only all year
001Cadmium, potentially dissolvd30DA AVG report only all year
001Cadmium, potentially dissolvdDAILY MX report only all year
001Cadmium, potentially dissolvdROLL AVG report only all year
001Lead, potentially dissolvd30DA AVG report only all year
001Lead, potentially dissolvdDAILY MX report only all year
001Lead, potentially dissolvdROLL AVG <= .81 ug/L all year
001Manganese, potentially dissolvd30DA AVG report only all year
001Manganese, potentially dissolvdDAILY MX report only all year
001Nickel, potentially dissolvd30DA AVG report only all year
001Nickel, potentially dissolvdDAILY MX report only all year
001Selenium, potentially dissolvd30DA AVG report only all year
001Selenium, potentially dissolvdDAILY MX report only all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Total phenolsDAILY MX report only all year
001Manganese, total recoverable30DA AVG report only all year
001Uranium, total30DA AVG report only all year
001Flow, in conduit or thru treatment plant30DA AVG <= 3 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Mercury, total [low level]30DA AVG <= .16 ug/L all year
001Mercury, total [low level]ROLL AVG <= .025 ug/L all year
001Acrylamide30DA AVG <= .36 ug/L all year
001E. coli30DA GM <= 850 #/100mL all year
001E. coliMX 7D GM <= 1699 #/100mL all year
001Sulfide-hydrogen sulfide [undissociated]30DA AVG <= .033 mg/L all year
001Nonylphenol30DA AVG report only all year
001NonylphenolDAILY MX report only all year
001Solids, total dissolved30DA AVG report only all year
001Solids, total dissolvedDAILY MX report only all year
001Solids, total dissolved30DA AVG report only all year
001Solids, total dissolvedDAILY MX report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Sulfate30DA AVG report only all year
001Dioxane30DA AVG <= 5.8 ug/L all year
001Boron, total30DA AVG <= 12 mg/L all year
001Oil and grease visualINST MAX report only all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE >= 100 % all year
001LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE >= 100 % all year
300Plant capacity fact. percent of capacity30DA AVG report only all year
300Plant capacity fact. percent of capacity30DA AVG report only all year
300BOD, 5-day, 20 deg. C30DA AVG report only all year
300BOD, 5-day, 20 deg. CMX 7D AV report only all year
300BOD, 5-day, 20 deg. C30DA AVG report only all year
300BOD, 5-day, 20 deg. CMX 7D AV report only all year
300Solids, total suspended30DA AVG report only all year
300Solids, total suspendedMX 7D AV report only all year
300Arsenic, total recoverable30DA AVG report only all year
300Flow, in conduit or thru treatment plant30DA AVG report only all year
300Flow, in conduit or thru treatment plantDAILY MX report only all year
PFASPerfluorooctanoic acid (PFOA)30DA AVG report only all year
PFASPerfluorooctanoic acid (PFOA)DAILY MX report only all year
PFASPerfluorobutanoic acid (PFBA)30DA AVG report only all year
PFASPerfluorobutanoic acid (PFBA)DAILY MX report only all year
PFASPerfluorooctanesulfonamide (PFOSA)30DA AVG report only all year
PFASPerfluorooctanesulfonamide (PFOSA)DAILY MX report only all year
PFASPerfluoropentanoic acid (PFPeA)30DA AVG report only all year
PFASPerfluoropentanoic acid (PFPeA)DAILY MX report only all year
PFASPerfluorohexanoic acid (PFHxA)30DA AVG report only all year
PFASPerfluorohexanoic acid (PFHxA)DAILY MX report only all year
PFASPerfluoroheptanoic acid (PFHpA)30DA AVG report only all year
PFASPerfluoroheptanoic acid (PFHpA)DAILY MX report only all year
PFASPerfluorononanoic acid (PFNA)30DA AVG report only all year
PFASPerfluorononanoic acid (PFNA)DAILY MX report only all year
PFASPerfluorodecanoic acid (PFDA)30DA AVG report only all year
PFASPerfluorodecanoic acid (PFDA)DAILY MX report only all year
PFASPerfluoroundecanoic acid (PFUnA)30DA AVG report only all year
PFASPerfluoroundecanoic acid (PFUnA)DAILY MX report only all year
PFASPerfluorododecanoic acid (PFDoA)30DA AVG report only all year
PFASPerfluorododecanoic acid (PFDoA)DAILY MX report only all year
PFASPerfluorotridecanoic acid (PFTrDA)30DA AVG report only all year
PFASPerfluorotridecanoic acid (PFTrDA)DAILY MX report only all year
PFASPerfluorotetradecanoic acid (PFTeDA)30DA AVG report only all year
PFASPerfluorotetradecanoic acid (PFTeDA)DAILY MX report only all year
PFASN-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)30DA AVG report only all year
PFASN-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)DAILY MX report only all year
PFASN-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)30DA AVG report only all year
PFASN-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)DAILY MX report only all year
PFASN-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)30DA AVG report only (alert) all year
PFASN-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)DAILY MX report only (alert) all year
PFASN-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)30DA AVG report only all year
PFASN-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)DAILY MX report only all year
PFASPerfluorobutanesulfonic acid (PFBS)30DA AVG report only all year
PFASPerfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
PFASPerfluorodecanesulfonic acid (PFDS)30DA AVG report only all year
PFASPerfluorodecanesulfonic acid (PFDS)DAILY MX report only all year
PFASPerfluoroheptanesulfonic acid (PFHpS)30DA AVG report only all year
PFASPerfluoroheptanesulfonic acid (PFHpS)DAILY MX report only all year
PFASPerfluorohexanesulfonic acid (PFHxS)30DA AVG report only all year
PFASPerfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
PFASPerfluorooctanesulfonic acid (PFOS)30DA AVG report only all year
PFASPerfluorooctanesulfonic acid (PFOS)DAILY MX report only all year
PFAS1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)30DA AVG report only all year
PFAS1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)DAILY MX report only all year
PFAS1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)30DA AVG report only all year
PFAS1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)DAILY MX report only all year
PFAS1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)30DA AVG report only all year
PFAS1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)DAILY MX report only all year
PFASPerfluoropentanesulfonic acid (PFPeS)30DA AVG report only all year
PFASPerfluoropentanesulfonic acid (PFPeS)DAILY MX report only all year
PFASPerfluorononanesulfonic acid (PFNS)30DA AVG report only all year
PFASPerfluorononanesulfonic acid (PFNS)DAILY MX report only all year
PFASHexafluoropropylene oxide dimer acid (HFPO-DA)30DA AVG report only all year
PFASHexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
PFASNonafluoro-3,6-dioxaheptanoic acid (NFDHA)30DA AVG report only all year
PFASNonafluoro-3,6-dioxaheptanoic acid (NFDHA)DAILY MX report only all year
PFASPerfluoro(2-ethoxyethane)sulfonic acid (PFEESA)30DA AVG report only all year
PFASPerfluoro(2-ethoxyethane)sulfonic acid (PFEESA)DAILY MX report only all year
PFASPerfluorododecanesulfonic acid (PFDoS)30DA AVG report only all year
PFASPerfluorododecanesulfonic acid (PFDoS)DAILY MX report only all year
PFAS4,8-Dioxa-3H-perfluorononanoic acid (ADONA)30DA AVG report only all year
PFAS4,8-Dioxa-3H-perfluorononanoic acid (ADONA)DAILY MX report only all year
PFASN-methyl perfluorooctanesulfonamide (NMeFOSA)30DA AVG report only all year
PFASN-methyl perfluorooctanesulfonamide (NMeFOSA)DAILY MX report only all year
PFASN-ethyl perfluorooctanesulfonamide (NEtFOSA)30DA AVG report only all year
PFASN-ethyl perfluorooctanesulfonamide (NEtFOSA)DAILY MX report only all year
PFASPFAS Sum30DA AVG report only (alert) all year
PFASPFAS SumDAILY MX report only (alert) all year
PFAS3-Perfluoropropyl propanoic acid (3:3 FTCA)30DA AVG report only all year
PFAS3-Perfluoropropyl propanoic acid (3:3 FTCA)DAILY MX report only all year
PFASPerfluoro-3-methoxypropanoic acid (PFMPA)30DA AVG report only all year
PFASPerfluoro-3-methoxypropanoic acid (PFMPA)DAILY MX report only all year
PFAS9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)30DA AVG report only all year
PFAS9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)DAILY MX report only all year
PFAS11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)30DA AVG report only all year
PFAS11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)DAILY MX report only all year
PFAS3-Perfluoroheptyl propanoic acid (7:3 FTCA)30DA AVG report only all year
PFAS3-Perfluoroheptyl propanoic acid (7:3 FTCA)DAILY MX report only all year
PFASPerfluoro-4-methoxybutanoic acid (PFMBA)30DA AVG report only all year
PFASPerfluoro-4-methoxybutanoic acid (PFMBA)DAILY MX report only all year
PFAS2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)30DA AVG report only all year
PFAS2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)DAILY MX report only all year

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