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Pronghorn Operating, LLC

Crude Petroleum And Natural Gas, (Unknown City), Wyoming. NPDES permit WY0052299, in force until Nov 30, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 60 reports late

Limits in force (111)

ParameterStatisticLimitMonthsOutfall
Specific conductancedaily maximum≤ 7500 umho/cmall year003
pHinstantaneous minimum≥ 6.5 SUall year003
pHinstantaneous maximum≤ 9 SUall year003
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all year003
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all year003
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all year003
Arsenic, total recoverabledaily maximum≤ 8.4 ug/Lall year003
Barium, total recoverabledaily maximum≤ 1800 ug/Lall year003
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year003
Chloridedaily maximum≤ 150 mg/Lall year003
Bicarbonate as [CaCO3]daily maximumreport only (mg/L)all year003
Flowdaily maximumreport only (MGD)all year003
Specific conductancedaily maximum≤ 7500 umho/cmall year013
pHinstantaneous minimum≥ 6.5 SUall year013
pHinstantaneous maximum≤ 9 SUall year013
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all year013
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all year013
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all year013
Arsenic, total recoverabledaily maximum≤ 8.4 ug/Lall year013
Barium, total recoverabledaily maximum≤ 1800 ug/Lall year013
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year013
Chloridedaily maximum≤ 150 mg/Lall year013
Bicarbonate as [CaCO3]daily maximumreport only (mg/L)all year013
Flowdaily maximumreport only (MGD)all year013
Specific conductancedaily maximum≤ 7500 umho/cmall year014
pHinstantaneous minimum≥ 6.5 SUall year014
pHinstantaneous maximum≤ 9 SUall year014
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all year014
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all year014
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all year014
Arsenic, total recoverabledaily maximum≤ 8.4 ug/Lall year014
Barium, total recoverabledaily maximum≤ 1800 ug/Lall year014
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year014
Chloridedaily maximum≤ 150 mg/Lall year014
Bicarbonate as [CaCO3]daily maximumreport only (mg/L)all year014
Flowdaily maximumreport only (MGD)all year014
Specific conductancedaily maximumreport only (umho/cm)all yearDPR
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all yearDPR
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all yearDPR
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all yearDPR
Sodium adsorption ratiodaily maximumreport only (Ratio)all yearDPR
Specific conductancedaily maximumreport only (umho/cm)all yearR03
Water Volumedaily maximumreport only (acre-ft)all yearR03
pHdaily minimumreport only (SU)all yearR03
pHdaily maximumreport only (SU)all yearR03
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all yearR03
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all yearR03
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all yearR03
Sodium adsorption ratiodaily maximumreport only (Ratio)all yearR03
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearR03
Bicarbonate as [CaCO3]daily maximumreport only (mg/L)all yearR03
Specific conductancedaily maximumreport only (umho/cm)all yearR13
Water Volumedaily maximumreport only (acre-ft)all yearR13
pHdaily minimumreport only (SU)all yearR13
pHdaily maximumreport only (SU)all yearR13
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all yearR13
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all yearR13
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all yearR13
Sodium adsorption ratiodaily maximumreport only (Ratio)all yearR13
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearR13
Bicarbonate as [CaCO3]daily maximumreport only (mg/L)all yearR13
Specific conductancedaily maximumreport only (umho/cm)all yearR14
Water Volumedaily maximumreport only (acre-ft)all yearR14
pHdaily minimumreport only (SU)all yearR14
pHdaily maximumreport only (SU)all yearR14
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all yearR14
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all yearR14
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all yearR14
Sodium adsorption ratiodaily maximumreport only (Ratio)all yearR14
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearR14
Bicarbonate as [CaCO3]daily maximumreport only (mg/L)all yearR14
Specific conductancedaily maximumreport only (umho/cm)all yearR15
Water Volumedaily maximumreport only (acre-ft)all yearR15
pHdaily minimumreport only (SU)all yearR15
pHdaily maximumreport only (SU)all yearR15
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all yearR15
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all yearR15
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all yearR15
Sodium adsorption ratiodaily maximumreport only (Ratio)all yearR15
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearR15
Bicarbonate as [CaCO3]daily maximumreport only (mg/L)all yearR15
Specific conductancedaily maximumreport only (umho/cm)all yearR16
Water Volumedaily maximumreport only (acre-ft)all yearR16
pHdaily minimumreport only (SU)all yearR16
pHdaily maximumreport only (SU)all yearR16
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all yearR16
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all yearR16
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all yearR16
Sodium adsorption ratiodaily maximumreport only (Ratio)all yearR16
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearR16
Bicarbonate as [CaCO3]daily maximumreport only (mg/L)all yearR16
Specific conductancedaily maximumreport only (umho/cm)all yearTRB1
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all yearTRB1
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all yearTRB1
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all yearTRB1
Sodium adsorption ratiodaily maximumreport only (Ratio)all yearTRB1
Soil Monitoringannual averagereport only (Y=0;N=1)all yearTRB1
Soil Monitoringannual averagereport only (Y=0;N=1)all yearTRB1
Crop Monitoringannual averagereport only (Y=0;N=1)all yearTRB1
Crop Monitoringannual averagereport only (Y=0;N=1)all yearTRB1
Groundwater Monitoringquarterly averagereport only (Y=0;N=1)all yearTRB1
Groundwater Monitoringquarterly averagereport only (Y=0;N=1)all yearTRB1
In-stream Monitoringmonthly averagereport only (Y=0;N=1)all yearTRB1
In-stream Monitoringmonthly averagereport only (Y=0;N=1)all yearTRB1
Flowmonthly averagereport only (MGD)all yearTRB1
Flowdaily maximumreport only (MGD)all yearTRB1
Specific conductancedaily maximumreport only (umho/cm)all yearUPR
Calcium, dissolved [as Ca]daily maximumreport only (mg/L)all yearUPR
Magnesium, dissolved [as Mg]daily maximumreport only (mg/L)all yearUPR
Sodium, dissolved [as Na]daily maximumreport only (mg/L)all yearUPR
Sodium adsorption ratiodaily maximumreport only (Ratio)all yearUPR

How strict are these limits?

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

Same industry: the 209 Oil and Gas Extraction permits in Wyoming.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WY0052299 · MCP: https://passage-data.com/mcp