NPDES permit CO0048854 · Major POTW · administratively continued, expires 2025-09-30 · EPA's file as of 2026-09-19
Check this month's numbers before you fileThis permit expired on 2025-09-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.
Last period with anything received: 2026-07-31.
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).
| Outfall | Parameter | Statistic | Limit | Months |
|---|---|---|---|---|
| 001 | Temperature, water deg. centigrade | MX WK AV | report only | all year |
| 001 | Temperature, water deg. centigrade | DAILY MX | report only | all year |
| 001 | pH | MINIMUM | >= 6.5 SU | all year |
| 001 | pH | MAXIMUM | <= 9 SU | all year |
| 001 | Solids, total suspended | 30DA AVG | <= 30 mg/L | all year |
| 001 | Solids, total suspended | MX 7D AV | <= 45 mg/L | all year |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 3.6 mg/L | Apr |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 5.1 mg/L | Feb |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 5.6 mg/L | Jan |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 2.5 mg/L | Jun |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 3.2 mg/L | May |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 2.2 mg/L | Jul |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 2.1 mg/L | Aug |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 4.6 mg/L | Mar |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 4.1 mg/L | Dec |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 3.2 mg/L | Nov |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 2.1 mg/L | Sep |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 2.6 mg/L | Oct |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 17 mg/L | Apr |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 19 mg/L | Feb |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 21 mg/L | Jan |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 16 mg/L | Jun |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 17 mg/L | May |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 16 mg/L | Jul |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 15 mg/L | Aug |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 20 mg/L | Mar |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 17 mg/L | Dec |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 16 mg/L | Nov |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 15 mg/L | Sep |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 17 mg/L | Oct |
| 001 | Phosphorus, total [as P] | ANNL MEDN | <= 12 mg/L | all year |
| 001 | Cyanide, weak acid, dissociable | DAILY MX | <= 57 ug/L | all year |
| 001 | Cyanide, weak acid, dissociable | DAILY MX | <= 5 ug/L | all year |
| 001 | Cyanide, total [as CN] | DAILY MX | report only | all year |
| 001 | Arsenic, total recoverable | 30DA AVG | report only | all year |
| 001 | Iron, total recoverable | 30DA AVG | report only | all year |
| 001 | Arsenic, total [as As] | DAILY MX | report only | all year |
| 001 | Cadmium, total [as Cd] | DAILY MX | report only | all year |
| 001 | Chromium, total [as Cr] | DAILY MX | report only | all year |
| 001 | Copper, total [as Cu] | DAILY MX | report only | all year |
| 001 | Lead, total [as Pb] | DAILY MX | report only | all year |
| 001 | Molybdenum, total [as Mo] | DAILY MX | report only | all year |
| 001 | Nickel, total [as Ni] | DAILY MX | report only | all year |
| 001 | Silver, total [as Ag] | DAILY MX | report only | all year |
| 001 | Zinc, total [as Zn] | DAILY MX | report only | all year |
| 001 | Molybdenum, total recoverable | 30DA AVG | report only | all year |
| 001 | Selenium, total [as Se] | DAILY MX | report only | all year |
| 001 | Chromium, hexavalent dissolved [as Cr] | 30DA AVG | <= 23.7 ug/L | all year |
| 001 | Chromium, hexavalent dissolved [as Cr] | 30DA AVG | <= 11 ug/L | all year |
| 001 | Chromium, hexavalent dissolved [as Cr] | DAILY MX | <= 23.7 ug/L | all year |
| 001 | Chromium, hexavalent dissolved [as Cr] | DAILY MX | <= 16 ug/L | all year |
| 001 | Zinc, potentially dissolved | 30DA AVG | report only | all year |
| 001 | Zinc, potentially dissolved | DAILY MX | report only | all year |
| 001 | Silver, potentially dissolved | 30DA AVG | <= 1 ug/L | all year |
| 001 | Silver, potentially dissolved | 30DA AVG | <= .59 ug/L | all year |
| 001 | Silver, potentially dissolved | DAILY MX | report only | all year |
| 001 | Silver, potentially dissolved | DAILY MX | report only | all year |
| 001 | Copper, potentially dissolved | 30DA AVG | <= 25 ug/L | all year |
| 001 | Copper, potentially dissolved | DAILY MX | report only | all year |
| 001 | Cadmium, potentially dissolvd | 30DA AVG | <= 1 ug/L | all year |
| 001 | Cadmium, potentially dissolvd | DAILY MX | <= 4.8 ug/L | all year |
| 001 | Chromium, trivalent, potentially dissolvd | 30DA AVG | report only | all year |
| 001 | Chromium, trivalent, potentially dissolvd | DAILY MX | report only | all year |
| 001 | Lead, potentially dissolvd | 30DA AVG | report only | all year |
| 001 | Lead, potentially dissolvd | DAILY MX | report only | all year |
| 001 | Manganese, potentially dissolvd | 30DA AVG | report only | all year |
| 001 | Manganese, potentially dissolvd | DAILY MX | report only | all year |
| 001 | Nickel, potentially dissolvd | 30DA AVG | report only | all year |
| 001 | Nickel, potentially dissolvd | DAILY MX | report only | all year |
| 001 | Selenium, potentially dissolvd | 30DA AVG | <= 4.6 ug/L | all year |
| 001 | Selenium, potentially dissolvd | DAILY MX | <= 18 ug/L | all year |
| 001 | Uranium, potentially dissolvd | 30DA AVG | report only | all year |
| 001 | Uranium, potentially dissolvd | DAILY MX | report only | all year |
| 001 | Oil and grease | INST MAX | <= 10 mg/L | all year |
| 001 | Total phenols | DAILY MX | report only | all year |
| 001 | Chromium, trivalent total recoverable | 30DA AVG | report only | all year |
| 001 | Chromium, trivalent total recoverable | DAILY MX | report only | all year |
| 001 | Radium 226 + radium 228, total | 30DA AVG | report only | all year |
| 001 | Strontium 90, total | 30DA AVG | report only | all year |
| 001 | Cesium-134 | 30DA AVG | report only | all year |
| 001 | Flow, in conduit or thru treatment plant | 30DA AVG | <= 2.33 MGD | all year |
| 001 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 001 | Chlorine, total residual | 30DA AVG | <= .011 mg/L | all year |
| 001 | Chlorine, total residual | INST MAX | <= .019 mg/L | all year |
| 001 | Mercury, total [low level] | 30DA AVG | <= 7.3 ug/L | all year |
| 001 | Mercury, total [low level] | 30DA AVG | <= .01 ug/L | all year |
| 001 | E. coli | 30DA AVG | <= 2000 #/100mL | all year |
| 001 | E. coli | MX 7D AV | <= 4000 #/100mL | all year |
| 001 | Sulfide-hydrogen sulfide [undissociated] | 30DA AVG | report only | all year |
| 001 | Nitrogen, Total As N | ANNL MEDN | <= 100 mg/L | all year |
| 001 | Nonylphenol | 30DA AVG | <= 10 ug/L | all year |
| 001 | Nonylphenol | 30DA AVG | <= 6.6 ug/L | all year |
| 001 | Nonylphenol | DAILY MX | report only | all year |
| 001 | Nonylphenol | DAILY MX | report only | all year |
| 001 | Thorium-230 + Thorium-232 | 30DA AVG | report only | all year |
| 001 | Solids, total dissolved | 30DA AVG | report only | all year |
| 001 | Solids, total dissolved | DAILY MX | report only | all year |
| 001 | Solids, total dissolved | 30DA AVG | report only | all year |
| 001 | Solids, total dissolved | DAILY MX | report only | all year |
| 001 | Mercury, total [as Hg] | 30DA AVG | report only | all year |
| 001 | Mercury, total [as Hg] | DAILY MX | report only | all year |
| 001 | BOD, carbonaceous [5 day, 20 C] | 30DA AVG | <= 25 mg/L | all year |
| 001 | BOD, carbonaceous [5 day, 20 C] | MX 7D AV | <= 40 mg/L | all year |
| 001 | BOD, carb-5 day, 20 deg C, percent removal | MO AV MN | >= 85 % | all year |
| 001 | Solids, suspended percent removal | MO AV MN | >= 85 % | all year |
| 001 | Oil and grease visual | INST MAX | report only | all year |
| 001 | Static Renewal 7 Day Chronic Ceriodaphnia dubia | SINGSAMP | report only | all year |
| 001 | Static Renewal 7 Day Chronic Ceriodaphnia dubia | MN VALUE | report only | all year |
| 001 | Static Renewal 7 Day Chronic Ceriodaphnia dubia | MN VALUE | >= 100 tox chronic | all year |
| 001 | Static Renewal 7 Day Chronic Pimephales promelas | SINGSAMP | report only | all year |
| 001 | Static Renewal 7 Day Chronic Pimephales promelas | MN VALUE | report only | all year |
| 001 | Static Renewal 7 Day Chronic Pimephales promelas | MN VALUE | >= 100 tox chronic | all year |
| 300 | Plant capacity fact. percent of capacity | 30DA AVG | report only | all year |
| 300 | Plant capacity fact. percent of capacity | 30DA AVG | report only | all year |
| 300 | BOD, 5-day, 20 deg. C | 30DA AVG | report only | all year |
| 300 | BOD, 5-day, 20 deg. C | MX 7D AV | report only | all year |
| 300 | BOD, 5-day, 20 deg. C | 30DA AVG | report only | all year |
| 300 | BOD, 5-day, 20 deg. C | MX 7D AV | report only | all year |
| 300 | Solids, total suspended | 30DA AVG | report only | all year |
| 300 | Solids, total suspended | MX 7D AV | report only | all year |
| 300 | Flow, in conduit or thru treatment plant | 30DA AVG | report only | all year |
| 300 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 300 | BOD, carbonaceous [5 day, 20 C] | 30DA AVG | report only | all year |
| 300 | BOD, carbonaceous [5 day, 20 C] | MX 7D AV | 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