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Evergreen Natural Resources LLC

Crude Petroleum And Natural Gas, Las Animas County, Colorado. NPDES permit CO0047776 expired Jun 30, 2020; its limits still apply. Last 12 months: no values over a limit, 2 of 226 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 005 form A monthly (12 values), outfall 005 form Q quarterly (16 values), outfall 005 form W quarterly (2 values), outfall 005A form W monthly (3 values), outfall 010 form A monthly (14 values), outfall 010 form Q1 quarterly (14 values), and 39 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 257 reports late

Limits in force (583)

ParameterStatisticLimitMonthsOutfall
Conductivity30-day average≤ 2.6 dS/mall year005
Conductivitydaily maximumreport only (dS/m)all year005
pHminimum≥ 6.5 SUall year005
pHmaximum≤ 9 SUall year005
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L)all year005
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L)all year005
Solids, total suspended30-day average≤ 30 mg/Lall year005
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year005
Calcium, total recoverable30-day averagereport only (mg/L)all year005
Calcium, total recoverabledaily maximumreport only (mg/L)all year005
Magnesium, total recoverable30-day averagereport only (mg/L)all year005
Magnesium, total recoverabledaily maximumreport only (mg/L)all year005
Sodium, total recoverable30-day averagereport only (mg/L)all year005
Sodium, total recoverabledaily maximumreport only (mg/L)all year005
Chloride [as Cl]30-day averagereport only (mg/L)all year005
Chloride [as Cl]rolling average≤ 117 mg/Lall year005
Arsenic, total recoverable30-day averagereport only (ug/L)all year005
Arsenic, total recoverablerolling averagereport only (ug/L)all year005
Iron, total recoverable30-day averagereport only (ug/L)all year005
Iron, total recoverable30-day average≤ 1000 ug/Lall year005
Iron, total recoverabledaily maximum≤ 5000 ug/Lall year005
Iron, total recoverablerolling average≤ 890 mg/Lall year005
Selenium, total recoverable30-day averagereport only (ug/L)all year005
Nickel, total recoverable30-day averagereport only (ug/L)all year005
Cadmium, total recoverable30-day averagereport only (ug/L)all year005
Lead, total recoverable30-day averagereport only (ug/L)all year005
Chromium, total recoverable30-day averagereport only (ug/L)all year005
Chromium, total recoverabledaily maximumreport only (ug/L)all year005
Copper, total recoverable30-day averagereport only (ug/L)all year005
Molybdenum, total recoverable30-day averagereport only (ug/L)all year005
Molybdenum, total recoverablerolling averagereport only (ug/L)all year005
Zinc, potentially dissolved30-day averagereport only (ug/L)all year005
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year005
Zinc, potentially dissolvedrolling averagereport only (ug/L)all year005
Copper, potentially dissolved30-day averagereport only (ug/L)all year005
Copper, potentially dissolveddaily maximumreport only (ug/L)all year005
Copper, potentially dissolvedrolling averagereport only (ug/L)all year005
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year005
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year005
Cadmium, potentially dissolvdrolling averagereport only (ug/L)all year005
Lead, potentially dissolvd30-day averagereport only (ug/L)all year005
Lead, potentially dissolvddaily maximumreport only (ug/L)all year005
Lead, potentially dissolvdrolling averagereport only (ug/L)all year005
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year005
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year005
Manganese, potentially dissolvdrolling averagereport only (ug/L)all year005
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year005
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year005
Nickel, potentially dissolvdrolling averagereport only (ug/L)all year005
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year005
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year005
Selenium, potentially dissolvdrolling averagereport only (ug/L)all year005
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year005
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year005
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year005
Chromium, trivalent total recoverablerolling averagereport only (ug/L)all year005
Flow, in conduit or thru treatment plant30-day average≤ .123 MGDall year005
Flow, in conduit or thru treatment plant30-day average≤ 3.69 MGDall year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
Mercury, total [low level]30-day averagereport only (mg/L)all year005
Mercury, total [low level]30-day averagereport only (mg/L)all year005
Mercury, total [low level]rolling averagereport only (mg/L)all year005
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year005
Sulfide-hydrogen sulfide [undissociated]rolling averagereport only (mg/L)all year005
Sodium Absorption Ratio30-day average≤ 71.7 Ratioall year005
Sodium Absorption Ratio30-day average≤ 79.4 Ratioall year005
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year005
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year005
Solids, total dissolved30-day averagereport only (mg/L)all year005
Solids, total dissolveddaily maximum≤ 3500 mg/Lall year005
Boron, total30-day averagereport only (mg/L)all year005
Boron, totalrolling averagereport only (mg/L)all year005
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year005
LC50 Static Renewal 48Hr Acute Daphnia magnaminimum value≥ 100 %all year005
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum value≥ 100 %all year005
Number of Events30-day average< 10 #all year005A
Number of Events7-day average< 3 #all year005A
Duration of discharge7-day average< 3 dall year005A
Conductivity30-day average≤ 2.4 dS/mall year010
Conductivitydaily maximumreport only (dS/m)all year010
pHminimum≥ 6.5 SUall year010
pHmaximum≤ 9 SUall year010
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L)all year010
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L)all year010
Solids, total suspended30-day average≤ 30 mg/Lall year010
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year010
Calcium, total recoverable30-day averagereport only (mg/L)all year010
Calcium, total recoverabledaily maximumreport only (mg/L)all year010
Magnesium, total recoverable30-day averagereport only (mg/L)all year010
Magnesium, total recoverabledaily maximumreport only (mg/L)all year010
Sodium, total recoverable30-day averagereport only (mg/L)all year010
Sodium, total recoverabledaily maximumreport only (mg/L)all year010
Chloride [as Cl]30-day averagereport only (mg/L)all year010
Chloride [as Cl]rolling averagereport only (mg/L)all year010
Arsenic, total recoverable30-day averagereport only (ug/L)all year010
Arsenic, total recoverablerolling averagereport only (ug/L)all year010
Iron, total recoverable30-day averagereport only (ug/L)all year010
Iron, total recoverablerolling averagereport only (mg/L)all year010
Selenium, total recoverable30-day averagereport only (ug/L)all year010
Nickel, total recoverable30-day averagereport only (ug/L)all year010
Cadmium, total recoverable30-day averagereport only (ug/L)all year010
Lead, total recoverable30-day averagereport only (ug/L)all year010
Chromium, total recoverable30-day averagereport only (ug/L)all year010
Chromium, total recoverabledaily maximumreport only (ug/L)all year010
Copper, total recoverable30-day averagereport only (ug/L)all year010
Molybdenum, total recoverable30-day averagereport only (ug/L)all year010
Molybdenum, total recoverablerolling averagereport only (ug/L)all year010
Zinc, potentially dissolved30-day averagereport only (ug/L)all year010
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year010
Zinc, potentially dissolvedrolling averagereport only (ug/L)all year010
Copper, potentially dissolved30-day averagereport only (ug/L)all year010
Copper, potentially dissolveddaily maximumreport only (ug/L)all year010
Copper, potentially dissolvedrolling averagereport only (ug/L)all year010
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year010
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year010
Cadmium, potentially dissolvdrolling averagereport only (ug/L)all year010
Lead, potentially dissolvd30-day averagereport only (ug/L)all year010
Lead, potentially dissolvddaily maximumreport only (ug/L)all year010
Lead, potentially dissolvdrolling averagereport only (ug/L)all year010
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year010
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year010
Manganese, potentially dissolvdrolling averagereport only (ug/L)all year010
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year010
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year010
Nickel, potentially dissolvdrolling averagereport only (ug/L)all year010
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year010
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year010
Selenium, potentially dissolvdrolling averagereport only (ug/L)all year010
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year010
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year010
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year010
Chromium, trivalent total recoverablerolling averagereport only (ug/L)all year010
Radium 226 + radium 228, total30-day averagereport only (pCi/L)all year010
Radium 226 + radium 228, totalrolling averagereport only (pCi/L)all year010
Flow, in conduit or thru treatment plant30-day average≤ .051 MGDall year010
Flow, in conduit or thru treatment plant30-day average≤ 1.53 MGDall year010
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year010
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year010
Mercury, total [low level]30-day averagereport only (mg/L)all year010
Mercury, total [low level]rolling averagereport only (mg/L)all year010
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year010
Sulfide-hydrogen sulfide [undissociated]rolling averagereport only (mg/L)all year010
Sodium Absorption Ratio30-day average≤ 75.3 Ratioall year010
Sodium Absorption Ratio30-day average≤ 75.6 Ratioall year010
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year010
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year010
Solids, total dissolved30-day averagereport only (mg/L)all year010
Solids, total dissolveddaily maximum≤ 3500 mg/Lall year010
Boron, total30-day averagereport only (ug/L)all year010
Boron, totalrolling averagereport only (ug/L)all year010
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year010
LC50 Static Renewal 48Hr Acute Daphnia magnaminimum value≥ 100 %all year010
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum value≥ 100 %all year010
Number of Events30-day average< 10 #all year010A
Number of Events7-day average< 3 #all year010A
Duration of discharge7-day average< 3 dall year010A
Conductivity30-day average≤ 4.6 dS/mall year022
Conductivitydaily maximumreport only (dS/m)all year022
pHminimum≥ 6.5 SUall year022
pHmaximum≤ 9 SUall year022
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L)all year022
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L)all year022
Solids, total suspended30-day average≤ 30 mg/Lall year022
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year022
Calcium, total recoverable30-day averagereport only (mg/L)all year022
Calcium, total recoverabledaily maximumreport only (mg/L)all year022
Magnesium, total recoverable30-day averagereport only (mg/L)all year022
Magnesium, total recoverabledaily maximumreport only (mg/L)all year022
Sodium, total recoverable30-day averagereport only (mg/L)all year022
Sodium, total recoverabledaily maximumreport only (mg/L)all year022
Chloride [as Cl]30-day averagereport only (mg/L)all year022
Chloride [as Cl]30-day average≤ 452 mg/Lall year022
Chloride [as Cl]rolling averagereport only (mg/L)all year022
Arsenic, total recoverable30-day averagereport only (ug/L)all year022
Arsenic, total recoverablerolling averagereport only (ug/L)all year022
Iron, total recoverable30-day averagereport only (ug/L)all year022
Iron, total recoverable30-day average≤ 1000 ug/Lall year022
Iron, total recoverabledaily maximum≤ 5000 ug/Lall year022
Iron, total recoverablerolling average≤ 829 ug/Lall year022
Chromium, total recoverable30-day averagereport only (ug/L)all year022
Chromium, total recoverabledaily maximumreport only (ug/L)all year022
Molybdenum, total recoverable30-day averagereport only (ug/L)all year022
Molybdenum, total recoverablerolling averagereport only (ug/L)all year022
Zinc, potentially dissolved30-day averagereport only (ug/L)all year022
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year022
Zinc, potentially dissolvedrolling averagereport only (ug/L)all year022
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year022
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year022
Cadmium, potentially dissolvdrolling averagereport only (ug/L)all year022
Lead, potentially dissolvd30-day averagereport only (ug/L)all year022
Lead, potentially dissolvddaily maximumreport only (ug/L)all year022
Lead, potentially dissolvdrolling averagereport only (ug/L)all year022
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year022
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year022
Manganese, potentially dissolvdrolling averagereport only (ug/L)all year022
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year022
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year022
Nickel, potentially dissolvdrolling averagereport only (ug/L)all year022
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year022
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year022
Selenium, potentially dissolvdrolling averagereport only (ug/L)all year022
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year022
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year022
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year022
Chromium, trivalent total recoverablerolling averagereport only (ug/L)all year022
Radium 226 + radium 228, total30-day averagereport only (pCi/L)all year022
Radium 226 + radium 228, totalrolling averagereport only (pCi/L)all year022
Flow, in conduit or thru treatment plant30-day average≤ .06 MGDall year022
Flow, in conduit or thru treatment plant30-day average≤ 1.8 MGDall year022
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year022
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year022
Mercury, total [low level]30-day averagereport only (mg/L)all year022
Mercury, total [low level]rolling averagereport only (mg/L)all year022
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year022
Sulfide-hydrogen sulfide [undissociated]rolling averagereport only (mg/L)all year022
Sodium Absorption Ratio30-day average≤ 93.7 Ratioall year022
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year022
Solids, total dissolved30-day averagereport only (mg/L)all year022
Solids, total dissolveddaily maximum≤ 3500 mg/Lall year022
Boron, total30-day averagereport only (mg/L)all year022
Boron, totalrolling averagereport only (mg/L)all year022
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year022
LC50 Static Renewal 48Hr Acute Daphnia magnaminimum value≥ 100 %all year022
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum value≥ 100 %all year022
Number of Events30-day average< 10 #all year022A
Number of Events7-day average< 3 #all year022A
Duration of discharge7-day average< 3 dall year022A
Conductivity30-day average≤ 1.9 dS/mall year027
Conductivitydaily maximumreport only (dS/m)all year027
pHminimum≥ 6.5 SUall year027
pHmaximum≤ 9 SUall year027
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L)all year027
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L)all year027
Solids, total suspended30-day average≤ 30 mg/Lall year027
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year027
Calcium, total recoverable30-day averagereport only (mg/L)all year027
Calcium, total recoverabledaily maximumreport only (mg/L)all year027
Magnesium, total recoverable30-day averagereport only (mg/L)all year027
Magnesium, total recoverabledaily maximumreport only (mg/L)all year027
Sodium, total recoverable30-day averagereport only (mg/L)all year027
Sodium, total recoverabledaily maximumreport only (mg/L)all year027
Chloride [as Cl]30-day averagereport only (mg/L)all year027
Chloride [as Cl]rolling averagereport only (mg/L)all year027
Arsenic, total recoverable30-day averagereport only (ug/L)all year027
Arsenic, total recoverablerolling averagereport only (ug/L)all year027
Iron, total recoverable30-day averagereport only (ug/L)all year027
Iron, total recoverable30-day average≤ 1000 ug/Lall year027
Iron, total recoverabledaily maximum≤ 5000 ug/Lall year027
Iron, total recoverablerolling averagereport only (ug/L)all year027
Iron, total recoverablerolling average≤ 744 ug/Lall year027
Selenium, total recoverable30-day averagereport only (ug/L)all year027
Nickel, total recoverable30-day averagereport only (ug/L)all year027
Cadmium, total recoverable30-day averagereport only (ug/L)all year027
Lead, total recoverable30-day averagereport only (ug/L)all year027
Chromium, total recoverable30-day averagereport only (ug/L)all year027
Chromium, total recoverabledaily maximumreport only (ug/L)all year027
Copper, total recoverable30-day averagereport only (ug/L)all year027
Molybdenum, total recoverable30-day averagereport only (ug/L)all year027
Molybdenum, total recoverablerolling averagereport only (ug/L)all year027
Zinc, potentially dissolved30-day averagereport only (ug/L)all year027
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year027
Zinc, potentially dissolvedrolling averagereport only (ug/L)all year027
Copper, potentially dissolved30-day averagereport only (ug/L)all year027
Copper, potentially dissolveddaily maximumreport only (ug/L)all year027
Copper, potentially dissolvedrolling averagereport only (ug/L)all year027
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year027
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year027
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year027
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year027
Cadmium, potentially dissolvdrolling averagereport only (ug/L)all year027
Cadmium, potentially dissolvdrolling averagereport only (ug/L)all year027
Lead, potentially dissolvd30-day averagereport only (ug/kg)all year027
Lead, potentially dissolvddaily maximumreport only (ug/kg)all year027
Lead, potentially dissolvdrolling averagereport only (ug/L)all year027
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year027
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year027
Manganese, potentially dissolvdrolling averagereport only (ug/L)all year027
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year027
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year027
Nickel, potentially dissolvdrolling averagereport only (ug/L)all year027
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year027
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year027
Selenium, potentially dissolvdrolling averagereport only (ug/L)all year027
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year027
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year027
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year027
Chromium, trivalent total recoverablerolling averagereport only (ug/L)all year027
Radium 226 + radium 228, total30-day averagereport only (pCi/L)all year027
Radium 226 + radium 228, totalrolling averagereport only (pCi/L)all year027
Flow, in conduit or thru treatment plant30-day average≤ .023 MGDall year027
Flow, in conduit or thru treatment plant30-day averagereport only (MGD)all year027
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year027
Flow, in conduit or thru treatment plantdaily maximum≤ .0588 MGDall year027
Mercury, total [low level]30-day averagereport only (mg/L)all year027
Mercury, total [low level]30-day averagereport only (mg/L)all year027
Mercury, total [low level]rolling averagereport only (mg/L)all year027
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year027
Sulfide-hydrogen sulfide [undissociated]rolling averagereport only (mg/L)all year027
Sodium Absorption Ratio30-day average≤ 58 Ratioall year027
Sodium Absorption Ratio30-day average≤ 62 Ratioall year027
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year027
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year027
Solids, total dissolved30-day averagereport only (mg/L)all year027
Solids, total dissolveddaily maximum≤ 3500 mg/Lall year027
Boron, total30-day averagereport only (ug/L)all year027
Boron, totalrolling averagereport only (ug/L)all year027
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year027
LC50 Static Renewal 48Hr Acute Daphnia magnaminimum value≥ 100 %all year027
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum value≥ 100 %all year027
Number of Events30-day average< 10 #all year027A
Number of Events7-day average< 3 #all year027A
Duration of discharge7-day average< 3 dall year027A
Conductivity30-day average≤ 1.8 dS/mall year059
Conductivitydaily maximumreport only (dS/m)all year059
pHminimum≥ 6.5 SUall year059
pHmaximum≤ 9 SUall year059
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L)all year059
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L)all year059
Solids, total suspended30-day average≤ 30 mg/Lall year059
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year059
Calcium, total recoverable30-day averagereport only (mg/L)all year059
Calcium, total recoverabledaily maximumreport only (mg/L)all year059
Magnesium, total recoverable30-day averagereport only (mg/L)all year059
Magnesium, total recoverabledaily maximumreport only (mg/L)all year059
Sodium, total recoverable30-day averagereport only (mg/L)all year059
Sodium, total recoverabledaily maximumreport only (mg/L)all year059
Chloride [as Cl]30-day averagereport only (mg/L)all year059
Chloride [as Cl]rolling averagereport only (mg/L)all year059
Arsenic, total recoverable30-day averagereport only (ug/L)all year059
Arsenic, total recoverablerolling averagereport only (ug/L)all year059
Iron, total recoverable30-day averagereport only (ug/L)all year059
Iron, total recoverablerolling averagereport only (ug/L)all year059
Selenium, total recoverable30-day averagereport only (ug/L)all year059
Nickel, total recoverable30-day averagereport only (ug/L)all year059
Cadmium, total recoverable30-day averagereport only (ug/L)all year059
Lead, total recoverable30-day averagereport only (ug/L)all year059
Chromium, total recoverable30-day averagereport only (ug/L)all year059
Chromium, total recoverabledaily maximumreport only (ug/L)all year059
Copper, total recoverable30-day averagereport only (ug/L)all year059
Molybdenum, total recoverable30-day averagereport only (ug/L)all year059
Molybdenum, total recoverablerolling averagereport only (ug/L)all year059
Zinc, potentially dissolved30-day averagereport only (ug/L)all year059
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year059
Zinc, potentially dissolvedrolling averagereport only (ug/L)all year059
Copper, potentially dissolved30-day averagereport only (ug/L)all year059
Copper, potentially dissolveddaily maximumreport only (ug/L)all year059
Copper, potentially dissolvedrolling averagereport only (ug/L)all year059
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year059
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year059
Cadmium, potentially dissolvdrolling averagereport only (ug/L)all year059
Lead, potentially dissolvd30-day averagereport only (ug/L)all year059
Lead, potentially dissolvddaily maximumreport only (ug/L)all year059
Lead, potentially dissolvdrolling averagereport only (ug/L)all year059
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year059
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year059
Manganese, potentially dissolvdrolling averagereport only (ug/L)all year059
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year059
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year059
Nickel, potentially dissolvdrolling averagereport only (ug/L)all year059
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year059
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year059
Selenium, potentially dissolvdrolling averagereport only (ug/L)all year059
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year059
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year059
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year059
Chromium, trivalent total recoverablerolling averagereport only (ug/L)all year059
Radium 226 + radium 228, total30-day averagereport only (pCi/L)all year059
Radium 226 + radium 228, totalrolling averagereport only (pCi/L)all year059
Flow, in conduit or thru treatment plant30-day average≤ .024 MGDall year059
Flow, in conduit or thru treatment plant30-day average≤ .72 MGDall year059
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year059
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year059
Mercury, total [low level]30-day averagereport only (mg/L)all year059
Mercury, total [low level]rolling averagereport only (mg/L)all year059
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year059
Sulfide-hydrogen sulfide [undissociated]rolling averagereport only (mg/L)all year059
Sodium Absorption Ratio30-day average≤ 59.7 Ratioall year059
Sodium Absorption Ratio30-day average≤ 62.8 Ratioall year059
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year059
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year059
Solids, total dissolved30-day averagereport only (mg/L)all year059
Solids, total dissolveddaily maximum≤ 3500 mg/Lall year059
Boron, total30-day averagereport only (ug/L)all year059
Boron, totalrolling averagereport only (ug/L)all year059
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year059
LC50 Static Renewal 48Hr Acute Daphnia magnaminimum value≥ 100 %all year059
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum value≥ 100 %all year059
Number of Events30-day average< 10 #all year059A
Number of Events7-day average< 3 #all year059A
Duration of discharge7-day average< 3 dall year059A
Conductivity30-day average≤ 2.1 dS/mall year075
Conductivitydaily maximumreport only (dS/m)all year075
pHminimum≥ 6.5 SUall year075
pHmaximum≤ 9 SUall year075
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L)all year075
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L)all year075
Solids, total suspended30-day average≤ 30 mg/Lall year075
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year075
Calcium, total recoverable30-day averagereport only (mg/L)all year075
Calcium, total recoverabledaily maximumreport only (mg/L)all year075
Magnesium, total recoverable30-day averagereport only (mg/L)all year075
Magnesium, total recoverabledaily maximumreport only (mg/L)all year075
Sodium, total recoverable30-day averagereport only (mg/L)all year075
Sodium, total recoverabledaily maximumreport only (mg/L)all year075
Chloride [as Cl]30-day averagereport only (mg/L)all year075
Chloride [as Cl]rolling averagereport only (mg/L)all year075
Arsenic, total recoverable30-day averagereport only (ug/L)all year075
Arsenic, total recoverablerolling averagereport only (ug/L)all year075
Iron, total recoverable30-day averagereport only (ug/L)all year075
Iron, total recoverablerolling averagereport only (ug/L)all year075
Selenium, total recoverable30-day averagereport only (ug/L)all year075
Nickel, total recoverable30-day averagereport only (ug/L)all year075
Cadmium, total recoverable30-day averagereport only (ug/L)all year075
Lead, total recoverable30-day averagereport only (ug/L)all year075
Chromium, total recoverable30-day averagereport only (ug/L)all year075
Chromium, total recoverabledaily maximumreport only (ug/L)all year075
Copper, total recoverable30-day averagereport only (ug/L)all year075
Molybdenum, total recoverable30-day averagereport only (ug/L)all year075
Molybdenum, total recoverablerolling averagereport only (ug/L)all year075
Zinc, potentially dissolved30-day averagereport only (ug/L)all year075
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year075
Zinc, potentially dissolvedrolling averagereport only (ug/L)all year075
Copper, potentially dissolved30-day averagereport only (ug/L)all year075
Copper, potentially dissolveddaily maximumreport only (ug/L)all year075
Copper, potentially dissolvedrolling averagereport only (ug/L)all year075
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year075
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year075
Cadmium, potentially dissolvdrolling averagereport only (ug/L)all year075
Lead, potentially dissolvd30-day averagereport only (ug/L)all year075
Lead, potentially dissolvddaily maximumreport only (ug/L)all year075
Lead, potentially dissolvdrolling averagereport only (ug/L)all year075
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year075
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year075
Manganese, potentially dissolvdrolling averagereport only (ug/L)all year075
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year075
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year075
Nickel, potentially dissolvdrolling averagereport only (ug/L)all year075
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year075
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year075
Selenium, potentially dissolvdrolling averagereport only (ug/L)all year075
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year075
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year075
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year075
Chromium, trivalent total recoverablerolling averagereport only (ug/L)all year075
Radium 226 + radium 228, total30-day averagereport only (pCi/L)all year075
Radium 226 + radium 228, totalrolling averagereport only (pCi/L)all year075
Flow, in conduit or thru treatment plant30-day average≤ .03 MGDall year075
Flow, in conduit or thru treatment plant30-day average≤ .9 MGDall year075
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year075
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year075
Mercury, total [low level]30-day averagereport only (mg/L)all year075
Mercury, total [low level]rolling averagereport only (mg/L)all year075
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year075
Sulfide-hydrogen sulfide [undissociated]rolling averagereport only (mg/L)all year075
Sodium Absorption Ratio30-day average≤ 69.1 Ratioall year075
Sodium Absorption Ratio30-day average≤ 66.5 Ratioall year075
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year075
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year075
Solids, total dissolved30-day averagereport only (mg/L)all year075
Solids, total dissolveddaily maximum≤ 3500 mg/Lall year075
Boron, total30-day averagereport only (mg/L)all year075
Boron, totalrolling averagereport only (mg/L)all year075
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year075
LC50 Static Renewal 48Hr Acute Daphnia magnaminimum value≥ 100 %all year075
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum value≥ 100 %all year075
Number of Events30-day average< 10 #all year075A
Number of Events7-day average< 3 #all year075A
Duration of discharge7-day average< 3 dall year075A
Conductivity30-day average≤ 4.6 dS/mall year076
Conductivitydaily maximumreport only (dS/m)all year076
pHminimum≥ 6.5 SUall year076
pHmaximum≤ 9 SUall year076
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L)all year076
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L)all year076
Solids, total suspended30-day average≤ 30 mg/Lall year076
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year076
Calcium, total recoverable30-day averagereport only (mg/L)all year076
Calcium, total recoverabledaily maximumreport only (mg/L)all year076
Magnesium, total recoverable30-day averagereport only (mg/L)all year076
Magnesium, total recoverabledaily maximumreport only (mg/L)all year076
Sodium, total recoverable30-day averagereport only (mg/L)all year076
Sodium, total recoverabledaily maximumreport only (mg/L)all year076
Chloride [as Cl]30-day averagereport only (mg/L)all year076
Chloride [as Cl]rolling averagereport only (mg/L)all year076
Arsenic, total recoverable30-day averagereport only (ug/L)all year076
Arsenic, total recoverablerolling averagereport only (ug/L)all year076
Iron, total recoverable30-day average≤ 1000 ug/Lall year076
Iron, total recoverablerolling average≤ 510 ug/Lall year076
Selenium, total recoverable30-day averagereport only (ug/L)all year076
Nickel, total recoverable30-day averagereport only (ug/L)all year076
Cadmium, total recoverable30-day averagereport only (ug/L)all year076
Lead, total recoverable30-day averagereport only (ug/L)all year076
Chromium, total recoverable30-day averagereport only (ug/L)all year076
Chromium, total recoverabledaily maximumreport only (ug/L)all year076
Copper, total recoverable30-day averagereport only (ug/L)all year076
Molybdenum, total recoverable30-day averagereport only (ug/L)all year076
Molybdenum, total recoverablerolling averagereport only (ug/L)all year076
Zinc, potentially dissolved30-day averagereport only (ug/L)all year076
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year076
Zinc, potentially dissolvedrolling averagereport only (ug/L)all year076
Copper, potentially dissolved30-day averagereport only (ug/L)all year076
Copper, potentially dissolveddaily maximumreport only (ug/L)all year076
Copper, potentially dissolvedrolling averagereport only (ug/L)all year076
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year076
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year076
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year076
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year076
Cadmium, potentially dissolvdrolling averagereport only (ug/L)all year076
Cadmium, potentially dissolvdrolling averagereport only (ug/L)all year076
Lead, potentially dissolvd30-day averagereport only (ug/L)all year076
Lead, potentially dissolvddaily maximumreport only (ug/L)all year076
Lead, potentially dissolvdrolling averagereport only (ug/L)all year076
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year076
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year076
Manganese, potentially dissolvdrolling averagereport only (ug/L)all year076
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year076
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year076
Nickel, potentially dissolvdrolling averagereport only (ug/L)all year076
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year076
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year076
Selenium, potentially dissolvdrolling averagereport only (ug/L)all year076
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year076
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year076
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year076
Chromium, trivalent total recoverablerolling averagereport only (ug/L)all year076
Radium 226 + radium 228, total30-day averagereport only (pCi/L)all year076
Radium 226 + radium 228, totalrolling averagereport only (pCi/L)all year076
Flow, in conduit or thru treatment plant30-day average≤ .096 MGDall year076
Flow, in conduit or thru treatment plant30-day averagereport only (MGD)all year076
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year076
Flow, in conduit or thru treatment plantdaily maximum≤ .0504 MGDall year076
Mercury, total [low level]30-day averagereport only (mg/L)all year076
Mercury, total [low level]30-day averagereport only (mg/L)all year076
Mercury, total [low level]rolling averagereport only (mg/L)all year076
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year076
Sulfide-hydrogen sulfide [undissociated]rolling averagereport only (mg/L)all year076
Sodium Absorption Ratio30-day average≤ 91.7 Ratioall year076
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year076
Sodium Absorption Ratiodaily maximumreport only (Ratio)all year076
Solids, total dissolved30-day averagereport only (mg/L)all year076
Solids, total dissolveddaily maximum≤ 3500 mg/Lall year076
Boron, total30-day averagereport only (ug/L)all year076
Boron, totalrolling averagereport only (ug/L)all year076
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year076
LC50 Static Renewal 48Hr Acute Daphnia magnaminimum value≥ 100 %all year076
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum value≥ 100 %all year076
Number of Events30-day average< 10 #all year076A
Number of Events7-day average< 3 #all year076A
Duration of discharge7-day average< 3 dall year076A
Conductivity30-day average≤ 1.3 dS/m (alert, not enforceable)all yearPR16
Conductivitydaily maximumreport only (dS/m) (alert, not enforceable)all yearPR16
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR16
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR16
Calcium, total [as Ca]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR16
Calcium, total [as Ca]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR16
Magnesium, total [as Mg]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR16
Magnesium, total [as Mg]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR16
Sodium, total [as Na]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR16
Sodium, total [as Na]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR16
Sodium Absorption Ratio30-day average≤ 6.8 Ratio (alert, not enforceable)all yearPR16
Conductivity30-day average≤ 1.3 dS/m (alert, not enforceable)all yearPR24
Conductivitydaily maximumreport only (dS/m) (alert, not enforceable)all yearPR24
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR24
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR24
Calcium, total [as Ca]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR24
Calcium, total [as Ca]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR24
Magnesium, total [as Mg]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR24
Magnesium, total [as Mg]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR24
Sodium, total [as Na]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR24
Sodium, total [as Na]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR24
Sodium Absorption Ratio30-day average≤ 6.8 Ratio (alert, not enforceable)all yearPR24
Conductivity30-day average≤ 1.3 dS/m (alert, not enforceable)all yearPR8
Conductivitydaily maximumreport only (dS/m) (alert, not enforceable)all yearPR8
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR8
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR8
Calcium, total [as Ca]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR8
Calcium, total [as Ca]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR8
Magnesium, total [as Mg]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR8
Magnesium, total [as Mg]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR8
Sodium, total [as Na]30-day averagereport only (mg/L) (alert, not enforceable)all yearPR8
Sodium, total [as Na]daily maximumreport only (mg/L) (alert, not enforceable)all yearPR8
Sodium Absorption Ratio30-day average≤ 6.8 Ratio (alert, not enforceable)all yearPR8

How strict are these limits?

Cited limits by parameter: Colorado's rules and the federal ones.

Same industry: the 8 Oil and Gas Extraction permits in Colorado.

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