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Blast Furnaces And Steel Mills, major discharger, Pueblo, Colorado. NPDES permit CO0000621 expired Mar 31, 2016; 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 | 30-day average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | maximum weekly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | maximum 7-day average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Conductivity | 30-day average | report only (dS/m) | all year | 001 |
| Conductivity | daily maximum | report only (dS/m) | all year | 001 |
| Sulfate [as S] | 30-day average | report only (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 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 1299 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 3527 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Calcium, dissolved [as Ca] | 30-day average | report only (mg/L) | all year | 001 |
| Magnesium, dissolved [as Mg] | 30-day average | report only (mg/L) | all year | 001 |
| Sodium, dissolved [as Na] | 30-day average | report only (mg/L) | all year | 001 |
| Cadmium, dissolved [as Cd] | 30-day average | report only (ug/L) | all year | 001 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | 30-day average | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | 30-day average | ≤ 1.861 lb/d | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ 6.743 lb/d | all year | 001 |
| Zinc, total [as Zn] | 30-day average | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | 30-day average | ≤ 10.39 lb/d | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ 39.29 lb/d | 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 |
| Oil and grease | 30-day average | report only (mg/L) | all year | 001 |
| Oil and grease | 30-day average | report only (mg/L) | all year | 001 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease | 30-day average | ≤ 64 lb/d | all year | 001 |
| Oil and grease | daily maximum | ≤ 2460 lb/d | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 57 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| E. coli | 30-day average | ≤ 141 #/100mL | all year | 001 |
| E. coli | maximum 7-day average | ≤ 282 #/100mL | all year | 001 |
| Cyanide, free available | daily maximum | report only (ug/L) | all year | 001 |
| Sodium Absorption Ratio | 30-day average | report only (pass=0;fail=1) | all year | 001 |
| Sodium Absorption Ratio | 30-day average | report only (Ratio) | all year | 001 |
| Sodium Absorption Ratio | 30-day average | report only (Ratio) | all year | 001 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 001 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | single sample | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | ≥ 48 tox chronic | all year | 001 |
| Static Renewal 7 Day Chronic Pimephales promelas | single sample | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Pimephales promelas | minimum value | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Pimephales promelas | minimum value | ≥ 48 tox chronic | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 250.2 lb/d | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 375.3 lb/d | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 250.2 lb/d | all year | 002 |
| Solids, total suspended | maximum 7-day average | ≤ 375.3 lb/d | all year | 002 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 002 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 300 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 300 |
| Lead, total [as Pb] | 30-day average | report only (ug/L) | all year | 300 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 300 |
| Zinc, total [as Zn] | 30-day average | report only (ug/L) | all year | 300 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 300 |
| Oil and grease | 30-day average | report only (mg/L) | all year | 300 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 300 |
Cited limits by parameter: Colorado's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/CO0000621 · MCP: https://passage-data.com/mcp