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NPDES permit CO0000051 · Minor NON-POTW · administratively continued, expires 2024-12-31 · 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 2024-12-31 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)
1of 20 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 (98)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMX WK AV <= 13.8 deg C Jan, Feb, Dec
001Temperature, water deg. centigradeMX WK AV <= 27.5 deg C Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Temperature, water deg. centigradeDAILY MX <= 25.2 deg C Jan, Feb, Dec
001Temperature, water deg. centigradeDAILY MX <= 28.6 deg C Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Conductivity30DA AVG report only all year
001ConductivityDAILY MX report only all year
001Oxygen, dissolved [DO]MINIMUM >= 5 mg/L 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, nitrite total [as N]DAILY MX <= .05 mg/L all year
001Nitrogen, nitrate total [as N]DAILY MX report only all year
001Sodium adsorption ratio30DA AVG report only all year
001Sodium adsorption ratioDAILY MX report only all year
001Chloride [as Cl]30DA AVG report only all year
001Arsenic, total recoverable30DA AVG <= 5.9 ug/L all year
001Arsenic, total recoverable30DA AVG <= 2.4 ug/L all year
001Arsenic, total recoverable30DA AVG <= .02 ug/L all year
001Iron, total recoverable30DA AVG <= 602 ug/L all year
001Manganese, dissolved [as Mn]30DA AVG report only all year
001Manganese, dissolved [as Mn]DAILY MX report only all year
001Nickel, total recoverable30DA AVG report only all year
001Cadmium, total recoverableDAILY MX report only all year
001Lead, total recoverableDAILY MX report only all year
001Molybdenum, total recoverable30DA AVG report only all year
001Molybdenum, total recoverableDAILY MX report only all year
001Chromium, hexavalent dissolved [as Cr]30DA AVG report only all year
001Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
001Zinc, potentially dissolved30DA AVG <= 106 ug/L all year
001Zinc, potentially dissolved30DA AVG <= 174 ug/L all year
001Zinc, potentially dissolvedDAILY MX <= 467 ug/L all year
001Zinc, potentially dissolvedDAILY MX <= 230 ug/L all year
001Silver, potentially dissolved30DA AVG <= .27 ug/L all year
001Silver, potentially dissolvedDAILY MX <= 4 ug/L all year
001Copper, potentially dissolved30DA AVG <= 29 ug/L all year
001Copper, potentially dissolved30DA AVG <= 13 ug/L all year
001Copper, potentially dissolvedDAILY MX <= 50 ug/L all year
001Copper, potentially dissolvedDAILY MX <= 20 ug/L all year
001Cadmium, potentially dissolvd30DA AVG <= .43 ug/L all year
001Cadmium, potentially dissolvdDAILY MX <= 3.9 ug/L all year
001Lead, potentially dissolvd30DA AVG <= 3.9 ug/L all year
001Lead, potentially dissolvdDAILY MX <= 99 ug/L all year
001Nickel, potentially dissolvd30DA AVG report only all year
001Nickel, potentially dissolvdDAILY MX report only all year
001Selenium, potentially dissolvd30DA AVG <= 4.6 ug/L all year
001Selenium, potentially dissolvdDAILY MX <= 18.4 ug/L all year
001Uranium, potentially dissolvd30DA AVG report only all year
001Uranium, potentially dissolvdDAILY MX report only all year
001Oil and greaseINST MAX <= 35 mg/L all year
001Radium 226 + radium 228, total30DA AVG <= 4.21 pCi/L all year
001Uranium, total30DA AVG report only all year
001Toluene30DA AVG report only all year
001TolueneDAILY MX report only all year
001TolueneROLL AVG report only all year
001Benzene30DA AVG <= 2.2 ug/L all year
001Acenaphthene30DA AVG <= 420 ug/L all year
001AcenaphtheneDAILY MX <= 1700 ug/L all year
001AcenaphtheneROLL AVG <= 63 ug/L all year
001Anthracene30DA AVG <= 2100 ug/L all year
001AnthraceneDAILY MX <= 5300 ug/L all year
001AnthraceneROLL AVG <= 315 ug/L all year
001Benzo[b]fluoranthene30DA AVG <= .0038 ug/L all year
001Benzo[k]fluoranthene30DA AVG <= .0038 ug/L all year
001Benzo[a]pyrene30DA AVG <= .0038 ug/L all year
001Chrysene30DA AVG <= .0038 ug/L all year
001Ethylbenzene30DA AVG report only all year
001EthylbenzeneDAILY MX report only all year
001EthylbenzeneROLL AVG report only all year
001Indeno[1,2,3-cd]pyrene30DA AVG <= .0038 ug/L all year
001Pyrene30DA AVG report only all year
001PyreneROLL AVG report only all year
001Benzo[ghi]perylene30DA AVG <= .0038 ug/L all year
001Benzo[a]anthracene30DA AVG <= .0038 ug/L all year
001Dibenz[a,h]anthracene30DA AVG <= .0038 ug/L all year
001Naphthalene30DA AVG report only all year
001NaphthaleneDAILY MX report only all year
001NaphthaleneROLL AVG report only all year
001Flow, in conduit or thru treatment plant30DA AVG <= .97 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Mercury, total [low level]30DA AVG <= .011 ug/L all year
001Acrylamide30DA AVG report only all year
001Sulfide-hydrogen sulfide [undissociated]30DA AVG report only all year
001Solids, total dissolved30DA AVG <= 3500 mg/L all year
001Xylenes [total], dry weight30DA AVG report only all year
001Xylenes [total], dry weightROLL AVG report only all year
001Quinoline30DA AVG <= .12 ug/L all year
001Sulfate30DA AVG report only all year
001Boron, total30DA AVG report only 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 >= 100 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 >= 100 tox chronic 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