Boulder City of

NPDES permit CO0024147 · Major POTW · administratively continued, expires 2016-04-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2016-04-30 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 49 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 (156)

OutfallParameterStatisticLimitMonths
001ATemperature, water deg. centigradeMX WK AV report only all year
001ATemperature, water deg. centigradeDAILY MX report only all year
001ApHMINIMUM >= 6.5 SU all year
001ApHMAXIMUM <= 9 SU all year
001ASolids, total suspended30DA AVG <= 30 mg/L all year
001ASolids, total suspendedMX 7D AV <= 45 mg/L all year
001ANitrogen, ammonia total [as N]30DA AVG <= 11.1 mg/L Oct
001ANitrogen, ammonia total [as N]30DA AVG <= 13.9 mg/L Nov
001ANitrogen, ammonia total [as N]30DA AVG <= 13.9 mg/L Dec
001ANitrogen, ammonia total [as N]30DA AVG <= 13.9 mg/L Jan
001ANitrogen, ammonia total [as N]30DA AVG <= 10.9 mg/L Feb
001ANitrogen, ammonia total [as N]30DA AVG <= 5.3 mg/L Mar
001ANitrogen, ammonia total [as N]30DA AVG <= 9.7 mg/L Apr
001ANitrogen, ammonia total [as N]30DA AVG <= 11.1 mg/L May
001ANitrogen, ammonia total [as N]30DA AVG <= 8.9 mg/L Jun
001ANitrogen, ammonia total [as N]30DA AVG <= 9.2 mg/L Jul
001ANitrogen, ammonia total [as N]30DA AVG <= 11.1 mg/L Aug
001ANitrogen, ammonia total [as N]30DA AVG <= 11.1 mg/L Sep
001ANitrogen, ammonia total [as N]DAILY MX <= 28.3 mg/L Oct
001ANitrogen, ammonia total [as N]DAILY MX <= 29.5 mg/L Nov
001ANitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Dec
001ANitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Jan
001ANitrogen, ammonia total [as N]DAILY MX <= 22.3 mg/L Feb
001ANitrogen, ammonia total [as N]DAILY MX <= 15.3 mg/L Mar
001ANitrogen, ammonia total [as N]DAILY MX <= 28 mg/L Apr
001ANitrogen, ammonia total [as N]DAILY MX <= 30 mg/L May
001ANitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Jun
001ANitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Jul
001ANitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Aug
001ANitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Sep
001ANitrogen, nitrate total [as N]DAILY MX report only all year
001ACyanide, weak acid, dissociableDAILY MX <= 30 ug/L all year
001ACyanide, weak acid, dissociableDAILY MX <= 5.4 ug/L all year
001AArsenic, total recoverable30DA AVG report only all year
001AManganese, dissolved [as Mn]30DA AVG report only all year
001ACopper, total recoverable30DA AVG <= 29 ug/L all year
001ACopper, total recoverableDAILY MX report only all year
001AChromium, hexavalent dissolved [as Cr]30DA AVG report only all year
001AChromium, hexavalent dissolved [as Cr]30DA AVG <= 12 ug/L all year
001AChromium, hexavalent dissolved [as Cr]DAILY MX report only all year
001AChromium, hexavalent dissolved [as Cr]DAILY MX <= 17 ug/L all year
001AZinc, potentially dissolved30DA AVG report only all year
001AZinc, potentially dissolvedDAILY MX report only all year
001ASilver, potentially dissolved30DA AVG report only all year
001ASilver, potentially dissolvedDAILY MX report only all year
001ACopper, potentially dissolved30DA AVG report only all year
001ACopper, potentially dissolved30DA AVG <= 21 ug/L all year
001ACopper, potentially dissolvedDAILY MX report only all year
001ACopper, potentially dissolvedDAILY MX report only all year
001ACadmium, potentially dissolvd30DA AVG <= .73 ug/L all year
001ACadmium, potentially dissolvdDAILY MX <= 5.3 ug/L all year
001AFlow, in conduit or thru treatment plant30DA AVG <= 25 MGD all year
001AFlow, in conduit or thru treatment plantDAILY MX report only all year
001AChlorine, total residual30DA AVG <= .003 mg/L all year
001AChlorine, total residualDAILY MX <= .02 mg/L all year
001AE. coli30DA AVG <= 123 #/100mL all year
001AE. coliMX 7D AV <= 246 #/100mL all year
001AToxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only all year
001AToxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only all year
001AToxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only all year
001AToxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only all year
001AMercury, total [as Hg]30DA AVG <= .01 ug/L all year
001ABOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
001ABOD, carbonaceous [5 day, 20 C]MX 7D AV <= 40 mg/L all year
001ABOD, carbonaceous, percent removalMO AV MN >= 85 % all year
001ASolids, suspended percent removalMO AV MN >= 85 % all year
001AOil and grease visualINST MAX report only all year
001A%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only all year
001A%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
001A%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 88 % all year
001A%Effect Static Renewal 7Day Chronic Pimephales promelasSINGSAMP report only all year
001A%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE report only all year
001A%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE >= 88 % all year
001BTemperature, water deg. centigradeMX WK AV report only all year
001BTemperature, water deg. centigradeDAILY MX report only all year
001BpHMINIMUM >= 6.5 SU all year
001BpHMAXIMUM <= 9 SU all year
001BSolids, total suspended30DA AVG <= 30 mg/L all year
001BSolids, total suspendedMX 7D AV <= 45 mg/L all year
001BNitrogen, ammonia total [as N]30DA AVG <= 13.9 mg/L Jan
001BNitrogen, ammonia total [as N]30DA AVG <= 11.1 mg/L Oct
001BNitrogen, ammonia total [as N]30DA AVG <= 13.9 mg/L Nov
001BNitrogen, ammonia total [as N]30DA AVG <= 13.9 mg/L Dec
001BNitrogen, ammonia total [as N]30DA AVG <= 10.9 mg/L Feb
001BNitrogen, ammonia total [as N]30DA AVG <= 5.3 mg/L Mar
001BNitrogen, ammonia total [as N]30DA AVG <= 9.7 mg/L Apr
001BNitrogen, ammonia total [as N]30DA AVG <= 11.1 mg/L May
001BNitrogen, ammonia total [as N]30DA AVG <= 8.9 mg/L Jun
001BNitrogen, ammonia total [as N]30DA AVG <= 9.2 mg/L Jul
001BNitrogen, ammonia total [as N]30DA AVG <= 11.1 mg/L Aug
001BNitrogen, ammonia total [as N]30DA AVG <= 11.1 mg/L Sep
001BNitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Jan
001BNitrogen, ammonia total [as N]DAILY MX <= 28.3 mg/L Oct
001BNitrogen, ammonia total [as N]DAILY MX <= 29.5 mg/L Nov
001BNitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Dec
001BNitrogen, ammonia total [as N]DAILY MX <= 22.3 mg/L Feb
001BNitrogen, ammonia total [as N]DAILY MX <= 15.3 mg/L Mar
001BNitrogen, ammonia total [as N]DAILY MX <= 28 mg/L Apr
001BNitrogen, ammonia total [as N]DAILY MX <= 30 mg/L May
001BNitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Jun
001BNitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Jul
001BNitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Aug
001BNitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Sep
001BNitrogen, nitrate total [as N]DAILY MX report only all year
001BCyanide, weak acid, dissociableDAILY MX <= 30 ug/L all year
001BCyanide, weak acid, dissociableDAILY MX <= 5.5 ug/L all year
001BArsenic, total recoverable30DA AVG report only all year
001BManganese, dissolved [as Mn]30DA AVG report only all year
001BCopper, total recoverable30DA AVG <= 29 ug/L all year
001BCopper, total recoverableDAILY MX report only all year
001BChromium, hexavalent dissolved [as Cr]30DA AVG report only all year
001BChromium, hexavalent dissolved [as Cr]30DA AVG <= 13 ug/L all year
001BChromium, hexavalent dissolved [as Cr]DAILY MX report only all year
001BChromium, hexavalent dissolved [as Cr]DAILY MX <= 18 ug/L all year
001BZinc, potentially dissolved30DA AVG report only all year
001BZinc, potentially dissolvedDAILY MX report only all year
001BSilver, potentially dissolved30DA AVG report only all year
001BSilver, potentially dissolvedDAILY MX report only all year
001BCopper, potentially dissolved30DA AVG report only all year
001BCopper, potentially dissolved30DA AVG <= 26 ug/L all year
001BCopper, potentially dissolvedDAILY MX report only all year
001BCopper, potentially dissolvedDAILY MX report only all year
001BCadmium, potentially dissolvd30DA AVG <= .74 ug/L all year
001BCadmium, potentially dissolvdDAILY MX <= 5.3 ug/L all year
001BFlow, in conduit or thru treatment plant30DA AVG <= 20 MGD all year
001BFlow, in conduit or thru treatment plantDAILY MX report only all year
001BChlorine, total residual30DA AVG <= .004 mg/L all year
001BChlorine, total residualDAILY MX <= .021 mg/L all year
001BE. coli30DA AVG <= 137 #/100mL all year
001BE. coliMX 7D AV <= 274 #/100mL all year
001BToxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only all year
001BToxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only all year
001BToxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only all year
001BToxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only all year
001BMercury, total [as Hg]30DA AVG <= .012 ug/L all year
001BBOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
001BBOD, carbonaceous [5 day, 20 C]MX 7D AV <= 40 mg/L all year
001BBOD, carbonaceous, percent removalMO AV MN >= 85 % all year
001BSolids, suspended percent removalMO AV MN >= 85 % all year
001BOil and grease visualINST MAX report only all year
001B%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only all year
001B%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
001B%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 86 % all year
001B%Effect Static Renewal 7Day Chronic Pimephales promelasSINGSAMP report only all year
001B%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE report only all year
001B%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE >= 86 % 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
300BOD, carbonaceous [5 day, 20 C]30DA AVG report only all year
300BOD, carbonaceous [5 day, 20 C]DAILY MX report only 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