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Cement, Hydraulic, Florence, Colorado. NPDES permit CO0000671 expired Feb 28, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Conductivity | 30-day average | report only (dS/m) | all year | 002 |
| Conductivity | daily maximum | report only (dS/m) | all year | 002 |
| pH | minimum | ≥ 6.5 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 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 85 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 85 mg/L | all year | 002 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 3264 mg/L | all year | 002 |
| Nitrogen, inorganic total | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, inorganic total | daily maximum | ≤ 3264 mg/L | all year | 002 |
| Cyanide, weak acid, dissociable | daily maximum | report only (ug/L) | all year | 002 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 002 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 002 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 002 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 002 |
| Manganese, dissolved [as Mn] | 30-day average | report only (ug/L) | all year | 002 |
| Manganese, dissolved [as Mn] | daily maximum | report only (ug/L) | all year | 002 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 002 |
| Aluminum, total recoverable | 30-day average | ≤ 87 ug/L | all year | 002 |
| Aluminum, total recoverable | 30-day average | ≤ 54298 ug/L | all year | 002 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Aluminum, total recoverable | daily maximum | ≤ 317382 ug/L | all year | 002 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | report only (ug/L) | all year | 002 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | 002 |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, potentially dissolved | rolling average | report only (ug/L) | all year | 002 |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | 002 |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | 002 |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | all year | 002 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | all year | 002 |
| Arsenic, potentially dissolved | daily maximum | report only (ug/L) | all year | 002 |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 002 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 002 |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | all year | 002 |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | all year | 002 |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | all year | 002 |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | 002 |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | 002 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 002 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 002 |
| Uranium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 002 |
| Uranium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 002 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 002 |
| Chromium, trivalent total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Radium 226 + radium 228, total | 30-day average | report only (pCi/L) | all year | 002 |
| Uranium, total | 30-day average | ≤ 30 ug/L | all year | 002 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .2 MGD | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| E. coli | 30-day geometric mean | ≤ 2000 #/100mL | all year | 002 |
| E. coli | maximum 7-day geometric mean | ≤ 4000 #/100mL | all year | 002 |
| E. coli | rolling average | ≤ 36 #/100mL | all year | 002 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 002 |
| Boron, total | 30-day average | report only (mg/L) | all year | 002 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 002 |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | minimum value | ≥ 100 % | all year | 002 |
| LC50 Static Renewal 96Hr Acute Pimephales promelas | minimum value | ≥ 100 % | all year | 002 |
| Conductivity | 30-day average | report only (dS/m) | all year | 003 |
| Conductivity | daily maximum | report only (dS/m) | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 85 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 85 mg/L | all year | 003 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 3264 mg/L | all year | 003 |
| Nitrogen, inorganic total | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, inorganic total | daily maximum | ≤ 3264 mg/L | all year | 003 |
| Cyanide, weak acid, dissociable | daily maximum | report only (ug/L) | all year | 003 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 003 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 003 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Manganese, dissolved [as Mn] | 30-day average | report only (ug/L) | all year | 003 |
| Manganese, dissolved [as Mn] | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Aluminum, total recoverable | 30-day average | ≤ 87 ug/L | all year | 003 |
| Aluminum, total recoverable | 30-day average | ≤ 54298 ug/L | all year | 003 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Aluminum, total recoverable | daily maximum | ≤ 317382 ug/L | all year | 003 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | report only (ug/L) | all year | 003 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | 003 |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, potentially dissolved | rolling average | report only (ug/L) | all year | 003 |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | 003 |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | 003 |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | all year | 003 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | all year | 003 |
| Arsenic, potentially dissolved | daily maximum | report only (ug/L) | all year | 003 |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Chromium, trivalent, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Uranium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Uranium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 003 |
| Chromium, trivalent total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Radium 226 + radium 228, total | 30-day average | report only (pCi/L) | all year | 003 |
| Uranium, total | 30-day average | ≤ 30 ug/L | all year | 003 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .15 MGD | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| E. coli | 30-day geometric mean | ≤ 2000 #/100mL | all year | 003 |
| E. coli | maximum 7-day geometric mean | ≤ 4000 #/100mL | all year | 003 |
| E. coli | rolling average | ≤ 36 #/100mL | all year | 003 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 003 |
| Boron, total | 30-day average | report only (mg/L) | all year | 003 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 003 |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | minimum value | ≥ 100 % | all year | 003 |
| LC50 Static Renewal 96Hr Acute Pimephales promelas | minimum value | ≥ 100 % | all year | 003 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 009 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 009 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 37.5 lb/d | all year | 009 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 56.3 lb/d | all year | 009 |
| pH | minimum | ≥ 6 SU | all year | 009 |
| pH | maximum | ≤ 9 SU | all year | 009 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 009 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 009 |
| Solids, total suspended | 30-day average | ≤ 37.5 lb/d | all year | 009 |
| Solids, total suspended | maximum 7-day average | ≤ 56.3 lb/d | all year | 009 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 009 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .15 MGD | all year | 009 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 009 |
| Chlorine, total residual | 30-day average | ≤ .5 mg/L | all year | 009 |
| Chlorine, total residual | instantaneous maximum | ≤ .5 mg/L | all year | 009 |
| E. coli | 30-day average | ≤ 2000 #/100mL | all year | 009 |
| E. coli | maximum 7-day average | ≤ 4000 #/100mL | all year | 009 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 009 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | 010 |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | 010 |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 010 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 010 |
| Conductivity | 30-day average | report only (dS/m) | all year | 011 |
| Conductivity | daily maximum | report only (dS/m) | all year | 011 |
| pH | minimum | ≥ 6.5 SU | all year | 011 |
| pH | maximum | ≤ 9 SU | all year | 011 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 011 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 011 |
| Cyanide, weak acid, dissociable | daily maximum | report only (ug/L) | all year | 011 |
| Cyanide, weak acid, dissociable | daily maximum | report only (ug/L) | all year | 011 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 011 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 011 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 011 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 011 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 011 |
| Selenium, total recoverable | 30-day average | ≤ 180 ug/L | all year | 011 |
| Selenium, total recoverable | 30-day average | ≤ 20 ug/L | all year | 011 |
| Beryllium, total recoverable [as Be] | 30-day average | report only (ug/L) | all year | 011 |
| Manganese, dissolved [as Mn] | 30-day average | report only (ug/L) | all year | 011 |
| Manganese, dissolved [as Mn] | 30-day average | report only (ug/L) | all year | 011 |
| Manganese, dissolved [as Mn] | daily maximum | report only (ug/L) | all year | 011 |
| Manganese, dissolved [as Mn] | daily maximum | report only (ug/L) | all year | 011 |
| Nickel, total recoverable | 30-day average | ≤ 300 ug/L | all year | 011 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 011 |
| Zinc, total recoverable | 30-day average | report only (ug/L) | all year | 011 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Aluminum, total recoverable | 30-day average | ≤ 100 ug/L | all year | 011 |
| Aluminum, total recoverable | 30-day average | report only (ug/L) | all year | 011 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Cadmium, total recoverable | 30-day average | report only (ug/L) | all year | 011 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Cadmium, total recoverable | daily maximum | ≤ 164 ug/L | all year | 011 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Copper, total recoverable | 30-day average | report only (ug/L) | all year | 011 |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | report only (ug/L) | all year | 011 |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | report only (ug/L) | all year | 011 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 011 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 011 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | 011 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | 011 |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | 011 |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | 011 |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | 011 |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | 011 |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | 011 |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | 011 |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | all year | 011 |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | all year | 011 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | all year | 011 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | all year | 011 |
| Arsenic, potentially dissolved | daily maximum | report only (ug/L) | all year | 011 |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 011 |
| Cadmium, potentially dissolvd | 30-day average | ≤ 59 ug/L | all year | 011 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 011 |
| Cadmium, potentially dissolvd | daily maximum | ≤ 185 ug/L | all year | 011 |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | all year | 011 |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | all year | 011 |
| Chromium, trivalent, potentially dissolvd | daily maximum | report only (ug/L) | all year | 011 |
| Chromium, trivalent, potentially dissolvd | daily maximum | report only (ug/L) | all year | 011 |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | all year | 011 |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | all year | 011 |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | all year | 011 |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | all year | 011 |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | 011 |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | 011 |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | 011 |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | 011 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 011 |
| Selenium, potentially dissolvd | 30-day average | ≤ 182 ug/L | all year | 011 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 011 |
| Selenium, potentially dissolvd | daily maximum | ≤ 586 ug/L | all year | 011 |
| Uranium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 011 |
| Uranium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 011 |
| Uranium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 011 |
| Uranium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 011 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 011 |
| Chromium, trivalent total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Chromium, trivalent total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Radium 226 + radium 228, total | 30-day average | report only (pCi/L) | all year | 011 |
| Uranium, total | 30-day average | report only (ug/L) | all year | 011 |
| Uranium, total | 30-day average | ≤ 30 ug/L | all year | 011 |
| Uranium, total | 30-day average | report only (ug/L) | all year | 011 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 1.8 MGD | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| Mercury, total [low level] | 30-day average | report only (ug/L) | all year | 011 |
| Mercury, total [low level] | daily maximum | report only (ug/L) | all year | 011 |
| Chromium, hexavalent tot recoverable | 30-day average | report only (ug/L) | all year | 011 |
| Boron, total | 30-day average | ≤ .75 mg/L | all year | 011 |
| Boron, total | 30-day average | report only (ug/L) | all year | 011 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 011 |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | minimum value | ≥ 100 % | all year | 011 |
| LC50 Static Renewal 96Hr Acute Pimephales promelas | minimum value | ≥ 100 % | all year | 011 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 012 |
| pH | minimum | ≥ 6 SU | all year | 012 |
| pH | maximum | ≤ 9 SU | all year | 012 |
| Temperature Increase Deg. C | daily maximum | ≤ 3 deg C | all year | 012 |
| Plant capacity fact. percent of capacity | 30-day average | report only (%) | all year | 300 |
| Plant capacity fact. percent of capacity | 30-day average | report only (%) | all year | 300 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 300 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | report only (mg/L) | all year | 300 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | 300 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | report only (lb/d) | all year | 300 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 300 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 300 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 300C |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 300C |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 301 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 301C |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 301C |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 302C |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 302C |
Cited limits by parameter: Colorado's rules and the federal ones.
Same industry: the 3 Stone, Clay, Glass and Concrete Products permits in Colorado.
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