Alamosa City of

NPDES permit CO0044458 · Major POTW · administratively continued, expires 2019-10-31 · 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 2019-10-31 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

0values over a limit
0required values missing, on 0 form(s)
0of 64 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among CO permits in EPA's filings — check your permit).

Limits in force (215)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMX WK AV report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
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, ammonia total [as N]30DA AVG <= 6.5 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 4.1 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 5.4 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 10 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 20 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 4.2 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 8.4 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 27 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 7.6 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 6.5 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 7.1 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 5.6 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 28 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 35 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 54 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 23 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 19 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 19 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 13 mg/L Dec
001Cyanide, weak acid, dissociableDAILY MX <= 6.3 ug/L all year
001Cyanide, weak acid, dissociableDAILY MX <= 6.3 ug/L all year
001Cyanide, total [as CN]DAILY MX report only all year
001Arsenic, total recoverable30DA AVG <= 15 ug/L all year
001Arsenic, total recoverable30DA AVG report only all year
001Iron, total recoverable30DA AVG <= 840 ug/L all year
001Iron, total recoverable30DA AVG <= 840 ug/L 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]DAILY MX 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
001Silver, total [as Ag]DAILY MX report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Selenium, total [as Se]DAILY MX report only all year
001Chromium, hexavalent dissolved [as Cr]30DA AVG <= 10 ug/L all year
001Chromium, hexavalent dissolved [as Cr]30DA AVG report only all year
001Chromium, hexavalent dissolved [as Cr]DAILY MX <= 20 ug/L all year
001Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
001Zinc, potentially dissolved30DA AVG <= 100 ug/L all year
001Zinc, potentially dissolved30DA AVG <= 100 ug/L all year
001Zinc, potentially dissolvedDAILY MX <= 127 ug/L all year
001Zinc, potentially dissolvedDAILY MX <= 127 ug/L all year
001Silver, potentially dissolved30DA AVG report only all year
001Silver, potentially dissolved30DA AVG <= .26 ug/L all year
001Silver, potentially dissolvedDAILY MX report only all year
001Silver, potentially dissolvedDAILY MX <= 1.1 ug/L all year
001Copper, potentially dissolved30DA AVG report only all year
001Copper, potentially dissolved30DA AVG <= 9 ug/L all year
001Copper, potentially dissolvedDAILY MX report only all year
001Copper, potentially dissolvedDAILY MX <= 10 ug/L all year
001Chromium, trivalent, potentially dissolvd30DA AVG report only all year
001Chromium, trivalent, potentially dissolvd30DA AVG <= 99 ug/L all year
001Chromium, trivalent, potentially dissolvdDAILY MX report only all year
001Chromium, trivalent, potentially dissolvdDAILY MX <= 469 ug/L all year
001Lead, potentially dissolvd30DA AVG <= 2 ug/L all year
001Lead, potentially dissolvdDAILY MX report only all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Total phenolsDAILY MX report only all year
001Flow, in conduit or thru treatment plant30DA AVG <= 2.571 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residual30DA AVG <= .011 mg/L all year
001Chlorine, total residualINST MAX <= .024 mg/L all year
001Mercury, total [low level]30DA AVG <= .02 ug/L all year
001E. coli30DA GM <= 147 #/100mL all year
001E. coliMX 7D GM <= 294 #/100mL all year
001Nonylphenol30DA AVG report only all year
001Nonylphenol30DA AVG report only all year
001NonylphenolDAILY MX report only all year
001NonylphenolDAILY MX report only all year
001Mercury, total [as Hg]30DA AVG <= .02 ug/L 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
001Oil and grease visualINST MAX report only all year
001Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only all year
001Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
001Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 49 tox chronic all year
001Static Renewal 7 Day Chronic Pimephales promelasSINGSAMP report only all year
001Static Renewal 7 Day Chronic Pimephales promelasMN VALUE report only all year
001Static Renewal 7 Day Chronic Pimephales promelasMN VALUE >= 49 tox chronic all year
002Temperature, water deg. centigradeMX WK AV report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002Conductivity30DA AVG report only all year
002BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Bicarbonate ion- [as HCO3]30DA AVG report only all year
002Bicarbonate ion- [as HCO3]MX 7D AV report only all year
002Solids, total suspended30DA AVG <= 30 mg/L all year
002Solids, total suspendedMX 7D AV <= 45 mg/L all year
002Nitrogen, ammonia total [as N]30DA AVG <= 22 mg/L Jan
002Nitrogen, ammonia total [as N]30DA AVG <= 29 mg/L Feb
002Nitrogen, ammonia total [as N]30DA AVG <= 17 mg/L Mar
002Nitrogen, ammonia total [as N]30DA AVG <= 7.5 mg/L Apr
002Nitrogen, ammonia total [as N]30DA AVG <= 6.5 mg/L May
002Nitrogen, ammonia total [as N]30DA AVG <= 6.5 mg/L Jun
002Nitrogen, ammonia total [as N]30DA AVG <= 4.4 mg/L Jul
002Nitrogen, ammonia total [as N]30DA AVG <= 4.4 mg/L Aug
002Nitrogen, ammonia total [as N]30DA AVG <= 8 mg/L Sep
002Nitrogen, ammonia total [as N]30DA AVG <= 16 mg/L Oct
002Nitrogen, ammonia total [as N]30DA AVG <= 15 mg/L Nov
002Nitrogen, ammonia total [as N]30DA AVG <= 14 mg/L Dec
002Nitrogen, ammonia total [as N]MX 7D AV <= 65 mg/L Jan
002Nitrogen, ammonia total [as N]MX 7D AV <= 65 mg/L Feb
002Nitrogen, ammonia total [as N]MX 7D AV <= 46 mg/L Mar
002Nitrogen, ammonia total [as N]MX 7D AV <= 48 mg/L Apr
002Nitrogen, ammonia total [as N]MX 7D AV <= 37 mg/L May
002Nitrogen, ammonia total [as N]MX 7D AV <= 40 mg/L Jun
002Nitrogen, ammonia total [as N]MX 7D AV <= 59 mg/L Jul
002Nitrogen, ammonia total [as N]MX 7D AV <= 57 mg/L Aug
002Nitrogen, ammonia total [as N]MX 7D AV <= 64 mg/L Sep
002Nitrogen, ammonia total [as N]MX 7D AV <= 46 mg/L Oct
002Nitrogen, ammonia total [as N]MX 7D AV <= 46 mg/L Nov
002Nitrogen, ammonia total [as N]MX 7D AV <= 41 mg/L Dec
002Cyanide, weak acid, dissociableDAILY MX <= 4 ug/L all year
002Cyanide, total [as CN]DAILY MX report only all year
002Calcium, total recoverable30DA AVG report only all year
002Calcium, total recoverableDAILY MX report only all year
002Magnesium, total recoverable30DA AVG report only all year
002Magnesium, total recoverableDAILY MX report only all year
002Sodium, total recoverable30DA AVG report only all year
002Sodium, total recoverableDAILY MX report only all year
002Sodium adsorption ratio30DA AVG report only all year
002Sodium adsorption ratioDAILY MX report only all year
002Sodium adsorption ratio30DA AVG report only all year
002Sodium adsorption ratioDAILY MX report only all year
002Arsenic, total recoverable30DA AVG report only all year
002Arsenic, total recoverable30DA AVG <= 50 ug/L all year
002Iron, total recoverable30DA AVG <= 840 ug/L all year
002Arsenic, total [as As]DAILY MX report only all year
002Cadmium, total [as Cd]DAILY MX report only all year
002Chromium, total [as Cr]DAILY MX report only all year
002Copper, total [as Cu]DAILY MX report only all year
002Lead, total [as Pb]DAILY MX report only all year
002Manganese, dissolved [as Mn]30DA AVG report only all year
002Molybdenum, total [as Mo]DAILY MX report only all year
002Nickel, total [as Ni]DAILY MX report only all year
002Silver, total [as Ag]DAILY MX report only all year
002Zinc, total [as Zn]DAILY MX report only all year
002Molybdenum, total recoverable30DA AVG report only all year
002Selenium, total [as Se]DAILY MX report only all year
002Chromium, hexavalent dissolved [as Cr]30DA AVG report only all year
002Chromium, hexavalent dissolved [as Cr]DAILY MX <= 56 ug/L all year
002Zinc, potentially dissolved30DA AVG report only all year
002Zinc, potentially dissolvedDAILY MX <= 424 ug/L all year
002Zinc, potentially dissolvedROLL AVG report only all year
002Silver, potentially dissolved30DA AVG report only all year
002Silver, potentially dissolved30DA AVG <= 1.9 ug/L all year
002Silver, potentially dissolvedDAILY MX report only all year
002Silver, potentially dissolvedDAILY MX report only all year
002Copper, potentially dissolved30DA AVG report only all year
002Copper, potentially dissolved30DA AVG report only all year
002Copper, potentially dissolvedDAILY MX report only all year
002Copper, potentially dissolvedDAILY MX <= 39 ug/L all year
002Copper, potentially dissolvedROLL AVG report only all year
002Cadmium, potentially dissolvd30DA AVG report only all year
002Cadmium, potentially dissolvdDAILY MX report only all year
002Chromium, trivalent, potentially dissolvdDAILY MX report only all year
002Lead, potentially dissolvdDAILY MX report only all year
002Nickel, potentially dissolvd30DA AVG report only all year
002Nickel, potentially dissolvdDAILY MX report only all year
002Selenium, potentially dissolvd30DA AVG report only all year
002Selenium, potentially dissolvdDAILY MX report only all year
002Oil and greaseINST MAX <= 10 mg/L all year
002Total phenolsDAILY MX report only all year
002Flow, in conduit or thru treatment plant30DA AVG <= 2.571 MGD all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residual30DA AVG <= .011 mg/L all year
002Chlorine, total residualINST MAX <= .067 mg/L all year
002Mercury, total [low level]30DA AVG report only all year
002E. coli30DA GM <= 147 #/100mL all year
002E. coliMX 7D GM <= 294 #/100mL all year
002Nonylphenol30DA AVG report only all year
002NonylphenolDAILY MX report only all year
002NonylphenolROLL AVG report only all year
002Sodium Absorption Ratio30DA AVG report only all year
002Sodium Absorption RatioDAILY MX report only all year
002Mercury, total [as Hg]DAILY MX report only all year
002BOD, 5-day, percent removalMO AV MN >= 85 % all year
002Solids, suspended percent removalMO AV MN >= 85 % all year
002Oil and grease visualINST MAX report only all year
002Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only all year
002Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
002Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 12 tox chronic all year
002Static Renewal 7 Day Chronic Pimephales promelasSINGSAMP report only all year
002Static Renewal 7 Day Chronic Pimephales promelasMN VALUE report only all year
002Static Renewal 7 Day Chronic Pimephales promelasMN VALUE >= 12 tox chronic all year
003Flow, in conduit or thru treatment plant30DA AVG <= 2.571 MGD all year
003Flow, in conduit or thru treatment plantDAILY MX report only 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
300Flow, in conduit or thru treatment plant30DA AVG report only all year
300Flow, in conduit or thru treatment plantDAILY MX report only all year

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