Public Service Company of Colorado

NPDES permit CO0001121 · Major NON-POTW · administratively continued, expires 2013-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2013-07-31 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

1values over a limit
0required values missing, on 0 form(s)
0of 48 forms filed late

Last period with anything received: 2026-07-31. Most often over: LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia (1).

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 (120)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMAXIMUM <= 30 deg C all year
001Temperature, water deg. centigradeMX WK AV report only all year
001Temperature, water deg. centigradeMX WK AV <= 30 deg C all year
001Temperature, water deg. centigradeMAXIMUM report only all year
001Temperature, water deg. centigradeMAXIMUM report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedMX 7D AV <= 64 mg/L all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedMX 7D AV report only all year
001Iron, total recoverable30DA AVG report only all year
001Iron, total recoverableDAILY MX report only all year
001Chromium, total [as Cr]30DA AVG <= 180 ug/L all year
001Chromium, total [as Cr]DAILY MX <= 180 ug/L all year
001Zinc, total [as Zn]30DA AVG <= 890 ug/L all year
001Zinc, total [as Zn]DAILY MX <= 890 ug/L all year
001Copper, potentially dissolved30DA AVG report only all year
001Copper, potentially dissolvedDAILY MX report only all year
001Oil and grease30DA AVG <= 1.7 mg/L all year
001Oil and greaseINST MAX <= 4.8 mg/L all year
001E. coli, thermotol, MF, MTEC30DA GM report only all year
001E. coli, thermotol, MF, MTEC30DA GM report only all year
001E. coli, thermotol, MF, MTECMX 7D GM report only all year
001Flow, in conduit or thru treatment plant30DA AVG <= 2.4 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residual30DA AVG <= .22 mg/L all year
001Chlorine, total residualDAILY MX <= .24 mg/L all year
001Chlorine, free available30DA AVG <= .18 mg/L all year
001Mercury, total [as Hg]30DA AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Oil and grease visualINST MAX report only all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE >= 100 % Jun, Dec
001LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE >= 100 % Jun, Dec
002Temperature, water deg. centigradeMAXIMUM <= 30 deg C all year
002Temperature, water deg. centigradeMX WK AV report only all year
002Temperature, water deg. centigradeMX WK AV <= 30 deg C all year
002Temperature, water deg. centigradeMAXIMUM report only all year
002Temperature, water deg. centigradeMAXIMUM report only all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspended30DA AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Solids, total suspended30DA AVG <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 64 mg/L all year
002Solids, total suspended30DA AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Iron, total recoverable30DA AVG <= 5436 ug/L all year
002Iron, total recoverable30DA AVG <= 1000 ug/L all year
002Iron, total recoverableDAILY MX report only all year
002Iron, total recoverableDAILY MX report only all year
002Chromium, total [as Cr]30DA AVG <= 180 ug/L all year
002Chromium, total [as Cr]DAILY MX <= 180 ug/L all year
002Zinc, total [as Zn]30DA AVG <= 890 ug/L all year
002Zinc, total [as Zn]DAILY MX <= 890 ug/L all year
002Copper, potentially dissolved30DA AVG <= 320 ug/L all year
002Copper, potentially dissolvedDAILY MX <= 386 ug/L all year
002Oil and grease30DA AVG <= 1.7 mg/L all year
002Oil and greaseINST MAX <= 4.8 mg/L all year
002E. coli, thermotol, MF, MTEC30DA GM report only all year
002E. coli, thermotol, MF, MTEC30DA GM report only all year
002E. coli, thermotol, MF, MTECMX 7D GM report only all year
002Flow, in conduit or thru treatment plant30DA AVG <= 2.4 MGD all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residual30DA AVG <= .3 mg/L all year
002Chlorine, total residual30DA AVG <= .15 mg/L all year
002Chlorine, total residualDAILY MX <= .3 mg/L all year
002Chlorine, total residualDAILY MX <= .16 mg/L all year
002Chlorine, free available30DA AVG <= .18 mg/L all year
002Mercury, total [as Hg]30DA AVG report only all year
002Mercury, total [as Hg]DAILY MX report only all year
002Oil and grease visualINST MAX report only all year
002LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE >= 100 % Jun, Dec
002LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE >= 100 % Jun, Dec
007BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
007BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
007BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
007BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
007BOD, 5-day, 20 deg. C30DA AVG <= 7.26 lb/d all year
007BOD, 5-day, 20 deg. C30DA AVG report only all year
007BOD, 5-day, 20 deg. CMX 7D AV report only all year
007Solids, total suspended30DA AVG <= 75 mg/L all year
007Solids, total suspendedMX 7D AV <= 110 mg/L all year
007Oil and greaseINST MAX <= 10 mg/L all year
007E. coli, thermotol, MF, MTEC30DA GM report only all year
007E. coli, thermotol, MF, MTEC30DA GM <= 2000 #/100mL all year
007E. coli, thermotol, MF, MTECMX 7D GM report only all year
007E. coli, thermotol, MF, MTECMX 7D GM <= 4000 #/100mL all year
007Flow, in conduit or thru treatment plant30DA AVG <= .029 MGD all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Chlorine, total residual30DA AVG report only all year
007Chlorine, total residualINST MAX report only all year
007Coliform, fecal general30DAVGEO <= 6000 #/100mL all year
007Coliform, fecal generalMV <= 12000 #/100mL all year
007BOD, 5-day, percent removalMO AV MN report only all year
007Oil and grease visualINST MAX report only all year
MONSulfate [as S]30DA AVG report only all year
MONSulfate [as S]DAILY MX report only all year
MONNitrogen, inorganic total30DA AVG report only all year
MONNitrogen, inorganic totalDAILY MX report only all year
MONChloride [as Cl]30DA AVG report only all year
MONChloride [as Cl]DAILY MX report only all year
MONArsenic, total [as As]30DA AVG report only all year
MONArsenic, total [as As]DAILY MX report only all year
MONIron, dissolved [as Fe]30DA AVG report only all year
MONIron, dissolved [as Fe]DAILY MX report only all year
MONSilver, potentially dissolved30DA AVG report only all year
MONSilver, potentially dissolvedDAILY MX report only all year
MONCadmium, potentially dissolvd30DA AVG report only all year
MONCadmium, potentially dissolvdDAILY MX report only all year
MONLead, potentially dissolvd30DA AVG report only all year
MONLead, potentially dissolvdDAILY MX report only all year
MONManganese, potentially dissolvd30DA AVG report only all year
MONManganese, potentially dissolvdDAILY MX report only all year
MONNickel, potentially dissolvd30DA AVG report only all year
MONNickel, potentially dissolvdDAILY MX report only all year
MONSelenium, potentially dissolvd30DA AVG report only all year
MONSelenium, potentially dissolvdDAILY 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