NPDES permit CO0021113 · Minor POTW · administratively continued, expires 2021-12-31 · EPA's file as of 2026-09-19
Check this month's numbers before you fileThis permit expired on 2021-12-31 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. Most often over: Static Renewal 7 Day Chronic Ceriodaphnia dubia (3), Static Renewal 7 Day Chronic Pimephales promelas (1).
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 | BOD, 5-day, 20 deg. C | 30DA AVG | <= 30 mg/L | all year |
| 001 | BOD, 5-day, 20 deg. C | MX 7D AV | <= 45 mg/L | 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 | <= 5.1 mg/L | Apr |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 6 mg/L | Jan |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 6.8 mg/L | Feb |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 3.9 mg/L | Jun |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 2.5 mg/L | Jul |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 4.3 mg/L | May |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 2.6 mg/L | Aug |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 6.1 mg/L | Mar |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 4.3 mg/L | Oct |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 4.8 mg/L | Nov |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 2.5 mg/L | Sep |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | <= 6.1 ug/L | Dec |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 28 mg/L | Apr |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 28 mg/L | Jan |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 29 mg/L | Feb |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 28 mg/L | Jun |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 27 mg/L | Jul |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 27 mg/L | May |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 27 mg/L | Aug |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 28 mg/L | Mar |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 29 mg/L | Oct |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 28 mg/L | Nov |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 26 mg/L | Sep |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 29 ug/L | Dec |
| 001 | Arsenic, total recoverable | 30DA AVG | report only | all year |
| 001 | Iron, total recoverable | 30DA AVG | report only | all year |
| 001 | Molybdenum, total recoverable | 30DA AVG | report only | all year |
| 001 | Chromium, hexavalent dissolved [as Cr] | 30DA AVG | report only | all year |
| 001 | Chromium, hexavalent dissolved [as Cr] | DAILY MX | report only | 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 | report only | all year |
| 001 | Silver, potentially dissolved | DAILY MX | report only | all year |
| 001 | Chromium, trivalent, potentially dissolvd | 30DA AVG | 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 | Selenium, potentially dissolvd | 30DA AVG | report only | all year |
| 001 | Selenium, potentially dissolvd | DAILY MX | report only | all year |
| 001 | Oil and grease | INST MAX | <= 10 mg/L | 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 | Uranium, total | 30DA AVG | report only | all year |
| 001 | Uranium, total | DAILY MX | report only | all year |
| 001 | Flow, in conduit or thru treatment plant | 30DA AVG | <= .283 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 | report only | all year |
| 001 | E. coli | 30DA GM | report only | all year |
| 001 | E. coli | 30DA GM | <= 64 #/100mL | all year |
| 001 | E. coli | MX 7D GM | report only | all year |
| 001 | E. coli | MX 7D GM | <= 128 #/100mL | all year |
| 001 | BOD, 5-day, 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 |
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