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Industrial Organic Chemicals, Windsor, Colorado. NPDES permit CO0047635 expired Jun 30, 2020; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | maximum weekly average | ≤ 30 deg C | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Conductivity | 85th percentile | ≤ 3.62 dS/m | all year | 001 |
| Conductivity | daily maximum | report only (dS/m) | all year | 001 |
| Conductivity | daily maximum | report only (dS/m) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Bicarbonate ion- [as HCO3] | 30-day average | report only (mg/L) | all year | 001 |
| Bicarbonate ion- [as HCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | ≤ 7.9 mg/L | all year | 001 |
| Nitrogen, inorganic total | annual median | report only (mg/L) | all year | 001 |
| Nitrogen, inorganic total | 95th percentile | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | annual median | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | 95th percentile | report only (mg/L) | all year | 001 |
| Calcium, total recoverable | 30-day average | report only (mg/L) | all year | 001 |
| Calcium, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Magnesium, total recoverable | 30-day average | report only (mg/L) | all year | 001 |
| Magnesium, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Sodium, total recoverable | 30-day average | report only (mg/L) | all year | 001 |
| Sodium, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 001 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 001 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 001 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 001 |
| Arsenic, total recoverable | 30-day average | ≤ 50.8 ug/L | all year | 001 |
| Iron, total recoverable | 30-day average | ≤ 800 ug/L | all year | 001 |
| Aluminum, total recoverable | 30-day average | ≤ 685 ug/L | all year | 001 |
| Aluminum, total recoverable | daily maximum | ≤ 57012 ug/L | all year | 001 |
| Aluminum, total recoverable | rolling average | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Copper, potentially dissolved | 30-day average | ≤ 29 ug/L | all year | 001 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, potentially dissolvd | 30-day average | ≤ 3 ug/L | all year | 001 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | rolling average | report only (ug/L) | all year | 001 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .482 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | 30-day average | ≤ .074 mg/L | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .5 mg/L | all year | 001 |
| E. coli | 30-day geometric mean | report only (#/100mL) | all year | 001 |
| E. coli | maximum 7-day geometric mean | report only (#/100mL) | all year | 001 |
| Sodium Absorption Ratio | daily maximum | report only (pass=0;fail=1) | all year | 001 |
| Mercury, total [as Hg] | 30-day average | ≤ .01 ug/L | all year | 001 |
| Boron, total | 30-day average | ≤ .97 mg/L | all year | 001 |
| Boron, total | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 001 |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | minimum value | ≥ 100 % | all year | 001 |
| LC50 Static Renewal 96Hr Acute Pimephales promelas | minimum value | ≥ 100 % | all year | 001 |
| Conductivity | 30-day average | ≤ 1.5 dS/m (alert, not enforceable) | all year | AII |
| Conductivity | daily maximum | report only (dS/m) (alert, not enforceable) | all year | AII |
| Bicarbonate ion- [as HCO3] | 30-day average | report only (mg/L) (alert, not enforceable) | all year | AII |
| Bicarbonate ion- [as HCO3] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | AII |
| Calcium, total recoverable | 30-day average | report only (mg/L) (alert, not enforceable) | all year | AII |
| Calcium, total recoverable | daily maximum | report only (mg/L) (alert, not enforceable) | all year | AII |
| Magnesium, total recoverable | 30-day average | report only (mg/L) (alert, not enforceable) | all year | AII |
| Magnesium, total recoverable | daily maximum | report only (mg/L) (alert, not enforceable) | all year | AII |
| Sodium, total recoverable | 30-day average | report only (mg/L) (alert, not enforceable) | all year | AII |
| Sodium, total recoverable | daily maximum | report only (mg/L) (alert, not enforceable) | all year | AII |
| Sodium Absorption Ratio | 30-day average | ≤ 9 Ratio (alert, not enforceable) | all year | AII |
| Sodium Absorption Ratio | daily maximum | report only (Ratio) (alert, not enforceable) | all year | AII |
| Temperature, water deg. centigrade | maximum weekly average | report only (deg C) | all year | UST1 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | UST1 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | WBD1 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | WBD1 |
| Oil and grease | 30-day average | ≤ 15 mg/L | all year | WBD1 |
| Oil and grease | daily maximum | ≤ 20 mg/L | all year | WBD1 |
Cited limits by parameter: Colorado's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/CO0047635 · MCP: https://passage-data.com/mcp