Arapahoe County Water and Wastewater Authority

NPDES permit CO0047589 · Major NON-POTW · administratively continued, expires 2013-08-31 · 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 2013-08-31 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

0values over a limit
0required values missing, on 0 form(s)
2of 32 forms filed late

Last period with anything received: 2026-08-31.

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 (149)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 5 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 suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedMX 7D AV <= 45 mg/L all year
001Solids, total suspendedMX 7D AV <= 45 mg/L all year
001Nitrogen, ammonia total [as N]30DA AVG <= 3.7 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 3.4 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 3.4 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 3.1 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 2.7 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 2.6 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 2.3 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 2 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 2.2 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 2.3 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 3 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 3.3 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 14 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 11 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 14 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 14 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 13 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 16 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 16 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 13 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 14 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 12 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 14 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 12 mg/L Dec
001Nitrogen, ammonia total [as N]ROLL AVG report only all year
001Nitrogen, nitrite total [as N]DAILY MX <= .5 mg/L all year
001Nitrogen, nitrite total [as N]ROLL AVG report only all year
001Nitrogen, nitrate total [as N]DAILY MX <= 10 mg/L all year
001Nitrogen, nitrate total [as N]ROLL AVG report only all year
001Phosphorus, total [as P]30DA AVG <= .05 mg/L all year
001Phosphorus, total [as P]30DA AVG <= .2 mg/L all year
001Phosphorus, total [as P]30DA AVG report only all year
001Phosphorus, total [as P]ANNL TOT <= 116 lb/yr Dec
001Cyanide, weak acid, dissociable30DA AVG report only all year
001Cyanide, weak acid, dissociableDAILY MX <= 5 ug/L all year
001Cyanide, weak acid, dissociableROLL AVG report only all year
001Sulfide, total [as S]30DA AVG <= .002 mg/L all year
001Sulfide, total [as S]ROLL AVG report only all year
001Chloride [as Cl]30DA AVG <= 250 mg/L all year
001Chloride [as Cl]ROLL AVG report only all year
001Iron, total recoverable30DA AVG <= 1000 ug/L all year
001Iron, total recoverableROLL AVG report only all year
001Arsenic, total [as As]30DA AVG <= 100 ug/L all year
001Arsenic, total [as As]30DA AVG <= 100 ug/L all year
001Arsenic, total [as As]DAILY MX <= 50 ug/L all year
001Arsenic, total [as As]ROLL AVG report only all year
001Boron, total [as B]30DA AVG <= .75 mg/L all year
001Boron, total [as B]ROLL AVG report only all year
001Cadmium, dissolved [as Cd]30DA AVG <= 4.5 ug/L all year
001Cadmium, dissolved [as Cd]30DA AVG <= 6.2 ug/L all year
001Cadmium, dissolved [as Cd]DAILY MX <= 12 ug/L all year
001Cadmium, dissolved [as Cd]DAILY MX <= 19 ug/L all year
001Cadmium, dissolved [as Cd]ROLL AVG report only all year
001Zinc, potentially dissolved30DA AVG <= 260 ug/L all year
001Zinc, potentially dissolved30DA AVG <= 382 ug/L all year
001Zinc, potentially dissolvedDAILY MX <= 260 ug/L all year
001Zinc, potentially dissolvedDAILY MX <= 379 ug/L all year
001Zinc, potentially dissolvedROLL AVG report only all year
001Silver, potentially dissolved30DA AVG <= 1.6 ug/L all year
001Silver, potentially dissolved30DA AVG <= 3.5 ug/L all year
001Silver, potentially dissolvedDAILY MX <= 10 ug/L all year
001Silver, potentially dissolvedDAILY MX <= 22 ug/L all year
001Silver, potentially dissolvedROLL AVG report only all year
001Copper, potentially dissolved30DA AVG <= 20 ug/L all year
001Copper, potentially dissolved30DA AVG <= 29 ug/L all year
001Copper, potentially dissolvedDAILY MX <= 33 ug/L all year
001Copper, potentially dissolvedDAILY MX <= 50 ug/L all year
001Copper, potentially dissolvedROLL AVG report only all year
001Chromium, trivalent, potentially dissolvd30DA AVG <= 160 ug/L all year
001Chromium, trivalent, potentially dissolvd30DA AVG <= 231 ug/L all year
001Chromium, trivalent, potentially dissolvdDAILY MX <= 1230 ug/L all year
001Chromium, trivalent, potentially dissolvdDAILY MX <= 1773 ug/L all year
001Chromium, trivalent, potentially dissolvdROLL AVG report only all year
001Lead, potentially dissolvd30DA AVG <= 6.9 ug/L all year
001Lead, potentially dissolvd30DA AVG <= 11 ug/L all year
001Lead, potentially dissolvdDAILY MX <= 177 ug/L all year
001Lead, potentially dissolvdDAILY MX <= 281 ug/L all year
001Lead, potentially dissolvdROLL AVG report only all year
001Manganese, potentially dissolvd30DA AVG <= 2256 ug/L all year
001Manganese, potentially dissolvd30DA AVG <= 2618 ug/L all year
001Manganese, potentially dissolvdDAILY MX <= 4083 ug/L all year
001Manganese, potentially dissolvdDAILY MX <= 4738 ug/L all year
001Manganese, potentially dissolvdROLL AVG report only all year
001Nickel, potentially dissolvd30DA AVG <= 115 ug/L all year
001Nickel, potentially dissolvd30DA AVG <= 168 ug/L all year
001Nickel, potentially dissolvdDAILY MX <= 1037 ug/L all year
001Nickel, potentially dissolvdDAILY MX <= 1513 ug/L all year
001Nickel, potentially dissolvdROLL AVG report only all year
001Selenium, potentially dissolvd30DA AVG <= 4.6 ug/L all year
001Selenium, potentially dissolvdDAILY MX <= 18.4 ug/L all year
001Selenium, potentially dissolvdROLL AVG report only all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Oil and greaseINST MAX <= 10 mg/L all year
001E. coli, thermotol, MF, MTEC30DA GM <= 126 #/100mL all year
001E. coli, thermotol, MF, MTECMX 7D GM <= 252 #/100mL all year
001Bromoform30DA AVG <= 4.3 ug/L all year
001BromoformROLL AVG report only all year
001Chloroform30DA AVG <= 3.4 ug/L all year
001ChloroformDAILY MX <= 28900 ug/L all year
001ChloroformROLL AVG report only all year
001Toluene30DA AVG <= 510 ug/L all year
001TolueneDAILY MX <= 17500 ug/L all year
001TolueneROLL AVG report only all year
001Chlorodibromomethane30DA AVG <= 54 ug/L all year
001ChlorodibromomethaneROLL AVG report only all year
001Tetrachloroethylene30DA AVG <= .69 ug/L all year
001TetrachloroethyleneDAILY MX <= 5280 ug/L all year
001TetrachloroethyleneROLL AVG report only all year
001Methoxychlor30DA AVG <= .03 ug/L all year
001MethoxychlorROLL AVG report only all year
001Hexachlorobenzene30DA AVG <= .00028 ug/L all year
001HexachlorobenzeneROLL AVG report only all year
001Flow, in conduit or thru treatment plant30DA AVG <= 6.3 MGD all year
001Flow, in conduit or thru treatment plant30DA AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only 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 residualDAILY MX <= .019 mg/L all year
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only all year
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only all year
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only all year
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only all year
001Solids, total dissolved30DA AVG report only all year
001Solids, total dissolvedDAILY MX <= 3500 mg/L all year
001Mercury, total [as Hg]30DA AVG <= .01 ug/L all year
001Mercury, total [as Hg]ROLL AVG report only all year
001Xylene [mix of m+o+p]30DA AVG <= 10000 ug/L all year
001Xylene [mix of m+o+p]ROLL AVG report only all year
001Oil and grease visualINST MAX report only all year
001Oil and grease visualINST MAX report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 100 % all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasSINGSAMP report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasSINGSAMP report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE >= 100 % 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