NPDES permit CO0001511 · Major NON-POTW · administratively continued, expires 2023-12-31 · EPA's file as of 2026-09-19
Check this month's numbers before you fileThis permit expired on 2023-12-31 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 |
|---|---|---|---|---|
| 004 | N-Nitrosodimethylamine [NDMA] | 30DA AVG | <= .014 ug/L | all year |
| 004 | N-Nitrosodimethylamine [NDMA] | 30DA AVG | <= .014 ug/L | all year |
| 004 | N-Nitrosodimethylamine [NDMA] | DAILY MX | report only | all year |
| 004 | N-Nitrosodimethylamine [NDMA] | DAILY MX | report only | all year |
| 004 | Flow, in conduit or thru treatment plant | 30DA AVG | report only | all year |
| 004 | Flow, in conduit or thru treatment plant | 30DA AVG | report only | all year |
| 004 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 004 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 004 | Methyl hydrazine | 30DA AVG | report only | all year |
| 004 | Methyl hydrazine | 30DA AVG | report only | all year |
| 004 | Methyl hydrazine | DAILY MX | report only | all year |
| 004 | Methyl hydrazine | DAILY MX | report only | all year |
| 004 | Hydrazine | 30DA AVG | <= .24 ug/L | all year |
| 004 | Hydrazine | 30DA AVG | <= .24 ug/L | all year |
| 004 | Hydrazine | DAILY MX | report only | all year |
| 004 | Hydrazine | DAILY MX | report only | all year |
| 100 | Temperature, water deg. centigrade | DAILY MX | report only | all year |
| 100 | Conductivity | 30DA AVG | report only | all year |
| 100 | Conductivity | DAILY MX | report only | all year |
| 100 | BOD, 5-day, 20 deg. C | 30DA AVG | <= 30 mg/L | all year |
| 100 | BOD, 5-day, 20 deg. C | MX 7D AV | <= 45 mg/L | all year |
| 100 | pH | MINIMUM | >= 6.5 SU | all year |
| 100 | pH | MAXIMUM | <= 9 SU | all year |
| 100 | Bicarbonate ion- [as HCO3] | 30DA AVG | report only | all year |
| 100 | Bicarbonate ion- [as HCO3] | DAILY MX | report only | all year |
| 100 | Solids, total suspended | 30DA AVG | <= 30 mg/L | all year |
| 100 | Solids, total suspended | MX 7D AV | <= 45 mg/L | all year |
| 100 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 1 mg/L | all year |
| 100 | Nitrogen, ammonia total [as N] | DAILY MX | <= 1 mg/L | all year |
| 100 | Nitrogen, nitrite total [as N] | DAILY MX | <= .99 mg/L | all year |
| 100 | Nitrogen, inorganic total | DAILY MX | report only | all year |
| 100 | Nitrogen, inorganic total | ROLL AVG | <= 17 mg/L | all year |
| 100 | Phosphorus, total [as P] | 30DA AVG | <= 1 mg/L | all year |
| 100 | Phosphorus, total [as P] | 30DA AVG | report only | all year |
| 100 | Phosphorus, total [as P] | 30DA AVG | <= 1005 lb/yr | Dec |
| 100 | Cyanide, weak acid, dissociable | DAILY MX | report only | all year |
| 100 | Cyanide, weak acid, dissociable | DAILY MX | <= 5 ug/L | all year |
| 100 | Calcium, total recoverable | 30DA AVG | report only | all year |
| 100 | Calcium, total recoverable | DAILY MX | report only | all year |
| 100 | Magnesium, total recoverable | 30DA AVG | report only | all year |
| 100 | Magnesium, total recoverable | DAILY MX | report only | all year |
| 100 | Sodium, total recoverable | 30DA AVG | report only | all year |
| 100 | Sodium, total recoverable | DAILY MX | report only | all year |
| 100 | Sodium adsorption ratio | 30DA AVG | report only | all year |
| 100 | Sodium adsorption ratio | DAILY MX | report only | all year |
| 100 | Sodium adsorption ratio | 30DA AVG | report only | all year |
| 100 | Sodium adsorption ratio | DAILY MX | report only | all year |
| 100 | Chloride [as Cl] | 30DA AVG | report only | all year |
| 100 | Chloride [as Cl] | ROLL AVG | report only | all year |
| 100 | Arsenic, total recoverable | 30DA AVG | report only | all year |
| 100 | Iron, total recoverable | 30DA AVG | report only | all year |
| 100 | Iron, total recoverable | ROLL AVG | report only | all year |
| 100 | Nickel, total recoverable | 30DA AVG | <= 810 ug/L | all year |
| 100 | Molybdenum, total recoverable | 30DA AVG | report only | all year |
| 100 | Molybdenum, total recoverable | ROLL AVG | report only | all year |
| 100 | Chromium, hexavalent dissolved [as Cr] | 30DA AVG | <= 218 ug/L | all year |
| 100 | Chromium, hexavalent dissolved [as Cr] | DAILY MX | report only | all year |
| 100 | Chromium, hexavalent dissolved [as Cr] | ROLL AVG | report only | all year |
| 100 | Zinc, potentially dissolved | 30DA AVG | report only | all year |
| 100 | Zinc, potentially dissolved | DAILY MX | <= 2876 ug/L | all year |
| 100 | Zinc, potentially dissolved | ROLL AVG | <= 1547 ug/L | all year |
| 100 | Silver, potentially dissolved | 30DA AVG | report only | all year |
| 100 | Silver, potentially dissolved | DAILY MX | <= 36 ug/L | all year |
| 100 | Silver, potentially dissolved | ROLL AVG | <= 1 ug/L | all year |
| 100 | Silver, potentially dissolved | ROLL AVG | <= .22 ug/L | all year |
| 100 | Copper, potentially dissolved | 30DA AVG | <= 15 ug/L | all year |
| 100 | Copper, potentially dissolved | DAILY MX | report only | all year |
| 100 | Cadmium, potentially dissolvd | 30DA AVG | <= 7.9 ug/L | all year |
| 100 | Cadmium, potentially dissolvd | DAILY MX | report only | all year |
| 100 | Cadmium, potentially dissolvd | ROLL AVG | report only | all year |
| 100 | Lead, potentially dissolvd | 30DA AVG | <= 46 ug/L | all year |
| 100 | Lead, potentially dissolvd | DAILY MX | report only | all year |
| 100 | Lead, potentially dissolvd | ROLL AVG | report only | all year |
| 100 | Manganese, potentially dissolvd | 30DA AVG | report only | all year |
| 100 | Nickel, potentially dissolvd | 30DA AVG | report only | all year |
| 100 | Nickel, potentially dissolvd | DAILY MX | <= 8622 ug/L | all year |
| 100 | Nickel, potentially dissolvd | ROLL AVG | <= 122 ug/L | all year |
| 100 | Selenium, potentially dissolvd | 30DA AVG | report only | all year |
| 100 | Selenium, potentially dissolvd | DAILY MX | report only | all year |
| 100 | Selenium, potentially dissolvd | ROLL AVG | report only | all year |
| 100 | Oil and grease | INST MAX | <= 10 mg/L | all year |
| 100 | Chromium, trivalent total recoverable | 30DA AVG | report only | all year |
| 100 | Chromium, trivalent total recoverable | DAILY MX | <= 991 ug/L | all year |
| 100 | Chromium, trivalent total recoverable | ROLL AVG | <= 149 ug/L | all year |
| 100 | Carbon tetrachloride | 30DA AVG | <= 4 ug/L | all year |
| 100 | 1,2-Dichloroethane | 30DA AVG | <= 5 ug/L | all year |
| 100 | Benzene | 30DA AVG | <= 5 ug/L | all year |
| 100 | Benzene | ROLL AVG | <= 6.5 ug/L | all year |
| 100 | Tetrachloroethylene | 30DA AVG | <= 21 ug/L | all year |
| 100 | Tetrachloroethylene | ROLL AVG | report only | all year |
| 100 | 1,1-Dichloroethylene | 30DA AVG | <= 3.2 ug/L | all year |
| 100 | 1,1-Dichloroethylene | ROLL AVG | <= 21 ug/L | all year |
| 100 | 1,1,1-Trichloroethane | 30DA AVG | <= 200 ug/L | all year |
| 100 | 1,1,1-Trichloroethane | ROLL AVG | <= 595 ug/L | all year |
| 100 | 1,1,2-Trichloroethane | 30DA AVG | <= 5 ug/L | all year |
| 100 | Vinyl chloride | 30DA AVG | <= .46 ug/L | all year |
| 100 | Trichloroethylene | 30DA AVG | <= 10 ug/L | all year |
| 100 | Trichloroethylene | ROLL AVG | report only | all year |
| 100 | Flow, in conduit or thru treatment plant | 30DA AVG | <= .55 MGD | all year |
| 100 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 100 | Chlorine, total residual | 30DA AVG | <= .15 mg/L | all year |
| 100 | Chlorine, total residual | INST MAX | <= .38 mg/L | all year |
| 100 | Mercury, total [low level] | 30DA AVG | <= .2 ug/L | all year |
| 100 | E. coli | 30DA GM | report only | all year |
| 100 | E. coli | MX 7D GM | report only | all year |
| 100 | Sulfide-hydrogen sulfide [undissociated] | 30DA AVG | report only | all year |
| 100 | Sulfide-hydrogen sulfide [undissociated] | ROLL AVG | report only | all year |
| 100 | Sodium Absorption Ratio | 30DA AVG | report only | all year |
| 100 | Sodium Absorption Ratio | DAILY MX | report only | all year |
| 100 | Sulfate | 30DA AVG | report only | all year |
| 100 | LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | MN VALUE | >= 100 % | all year |
| 100 | LC50 Static Renewal 96Hr Acute Pimephales promelas | MN VALUE | >= 100 % | all year |
| 106 | pH | MINIMUM | >= 6 SU | all year |
| 106 | pH | MAXIMUM | <= 9 SU | all year |
| 106 | Cyanide, total [as CN] | 30DA AVG | <= 650 ug/L | all year |
| 106 | Cyanide, total [as CN] | DAILY MX | <= 1200 ug/L | all year |
| 106 | Cadmium, total [as Cd] | 30DA AVG | <= 260 ug/L | all year |
| 106 | Cadmium, total [as Cd] | DAILY MX | <= 690 ug/L | all year |
| 106 | Chromium, total [as Cr] | 30DA AVG | <= 1710 ug/L | all year |
| 106 | Chromium, total [as Cr] | DAILY MX | <= 2770 ug/L | all year |
| 106 | Copper, total [as Cu] | 30DA AVG | <= 2070 ug/L | all year |
| 106 | Copper, total [as Cu] | DAILY MX | <= 3380 ug/L | all year |
| 106 | Lead, total [as Pb] | 30DA AVG | <= 430 ug/L | all year |
| 106 | Lead, total [as Pb] | DAILY MX | <= 690 ug/L | all year |
| 106 | Nickel, total [as Ni] | 30DA AVG | <= 2380 ug/L | all year |
| 106 | Nickel, total [as Ni] | DAILY MX | <= 3980 ug/L | all year |
| 106 | Silver, total [as Ag] | 30DA AVG | <= 240 ug/L | all year |
| 106 | Silver, total [as Ag] | DAILY MX | <= 430 ug/L | all year |
| 106 | Zinc, total [as Zn] | 30DA AVG | <= 1480 ug/L | all year |
| 106 | Zinc, total [as Zn] | DAILY MX | <= 2610 ug/L | all year |
| 106 | Oil and grease | 30DA AVG | <= 26 mg/L | all year |
| 106 | Oil and grease | INST MAX | <= 52 mg/L | all year |
| 106 | Flow, in conduit or thru treatment plant | 30DA AVG | report only | all year |
| 106 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 106 | Suspended Solids, Total | 30DA AVG | <= 31 mg/L | all year |
| 106 | Suspended Solids, Total | MX 7D AV | <= 60 mg/L | all year |
| 106 | Total toxic organics [TTO] [40 CFR433] | DAILY MX | <= 2130 ug/L | all year |
| UST1 | Temperature, water deg. centigrade | 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