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Pronghorn Operating, LLC

Crude Petroleum And Natural Gas, (Unknown City), Wyoming. NPDES permit WY0048321, in force until Nov 30, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Last report on file
December 2025
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 141 reports late

Limits in force (188)

ParameterStatisticLimitMonthsOutfall
Specific conductancedaily maximum≤ 7500 umho/cmall year002
pHinstantaneous minimum≥ 6.5 SUall year002
pHinstantaneous maximum≤ 9 SUall year002
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year002
Chloridedaily maximum≤ 2000 mg/Lall year002
Solids, total dissolveddaily maximumreport only (mg/L)all year002
Flowdaily maximumreport only (MGD)all year002
Flowdaily maximumreport only (MGD)all year002
Flowmonthly averagereport only (MGD)all year002
Flowmonthly averagereport only (MGD)all year002
Specific conductancedaily maximum≤ 7500 umho/cmall year003
pHinstantaneous minimum≥ 6.5 SUall year003
pHinstantaneous maximum≤ 9 SUall year003
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year003
Chloridedaily maximum≤ 2000 mg/Lall year003
Solids, total dissolveddaily maximumreport only (mg/L)all year003
Flowdaily maximumreport only (MGD)all year003
Flowdaily maximumreport only (MGD)all year003
Flowmonthly averagereport only (MGD)all year003
Flowmonthly averagereport only (MGD)all year003
Specific conductancedaily maximum≤ 7500 umho/cmall year004
pHinstantaneous minimum≥ 6.5 SUall year004
pHinstantaneous maximum≤ 9 SUall year004
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year004
Chloridedaily maximum≤ 2000 mg/Lall year004
Solids, total dissolveddaily maximumreport only (mg/L)all year004
Flowdaily maximumreport only (MGD)all year004
Flowdaily maximumreport only (MGD)all year004
Flowmonthly averagereport only (MGD)all year004
Flowmonthly averagereport only (MGD)all year004
Specific conductancedaily maximum≤ 7500 umho/cmall year009
pHinstantaneous minimum≥ 6.5 SUall year009
pHinstantaneous maximum≤ 9 SUall year009
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year009
Chloridedaily maximum≤ 2000 mg/Lall year009
Solids, total dissolveddaily maximumreport only (mg/L)all year009
Flowdaily maximumreport only (MGD)all year009
Flowdaily maximumreport only (MGD)all year009
Flowmonthly averagereport only (MGD)all year009
Flowmonthly averagereport only (MGD)all year009
Specific conductancedaily maximum≤ 7500 umho/cmall year011
pHinstantaneous minimum≥ 6.5 SUall year011
pHinstantaneous maximum≤ 9 SUall year011
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year011
Chloridedaily maximum≤ 2000 mg/Lall year011
Solids, total dissolveddaily maximumreport only (mg/L)all year011
Flowdaily maximumreport only (MGD)all year011
Flowdaily maximumreport only (MGD)all year011
Flowmonthly averagereport only (MGD)all year011
Flowmonthly averagereport only (MGD)all year011
Specific conductancedaily maximum≤ 7500 umho/cmall year018
pHinstantaneous minimum≥ 6.5 SUall year018
pHinstantaneous maximum≤ 9 SUall year018
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year018
Chloridedaily maximum≤ 2000 mg/Lall year018
Solids, total dissolveddaily maximumreport only (mg/L)all year018
Flowdaily maximumreport only (MGD)all year018
Flowdaily maximumreport only (MGD)all year018
Flowmonthly averagereport only (MGD)all year018
Flowmonthly averagereport only (MGD)all year018
Specific conductancedaily maximum≤ 7500 umho/cmall year019
pHinstantaneous minimum≥ 6.5 SUall year019
pHinstantaneous maximum≤ 9 SUall year019
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year019
Chloridedaily maximum≤ 2000 mg/Lall year019
Solids, total dissolveddaily maximumreport only (mg/L)all year019
Flowdaily maximumreport only (MGD)all year019
Flowdaily maximumreport only (MGD)all year019
Flowmonthly averagereport only (MGD)all year019
Flowmonthly averagereport only (MGD)all year019
Specific conductancedaily maximum≤ 7500 umho/cmall year020
pHinstantaneous minimum≥ 6.5 SUall year020
pHinstantaneous maximum≤ 9 SUall year020
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year020
Chloridedaily maximum≤ 2000 mg/Lall year020
Solids, total dissolveddaily maximumreport only (mg/L)all year020
Flowdaily maximumreport only (MGD)all year020
Flowdaily maximumreport only (MGD)all year020
Flowmonthly averagereport only (MGD)all year020
Flowmonthly averagereport only (MGD)all year020
Specific conductancedaily maximum≤ 7500 umho/cmall year021
pHinstantaneous minimum≥ 6.5 SUall year021
pHinstantaneous maximum≤ 9 SUall year021
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year021
Chloridedaily maximum≤ 2000 mg/Lall year021
Solids, total dissolveddaily maximumreport only (mg/L)all year021
Flowdaily maximumreport only (MGD)all year021
Flowdaily maximumreport only (MGD)all year021
Flowmonthly averagereport only (MGD)all year021
Flowmonthly averagereport only (MGD)all year021
Specific conductancedaily maximum≤ 7500 umho/cmall year024
pHinstantaneous minimum≥ 6.5 SUall year024
pHinstantaneous maximum≤ 9 SUall year024
Iron, dissolved [as Fe]daily maximum≤ 1000 ug/Lall year024
Chloridedaily maximum≤ 2000 mg/Lall year024
Solids, total dissolveddaily maximumreport only (mg/L)all year024
Flowdaily maximumreport only (MGD)all year024
Flowdaily maximumreport only (MGD)all year024
Flowmonthly averagereport only (MGD)all year024
Flowmonthly averagereport only (MGD)all year024
Specific conductancedaily maximumreport only (umho/cm)all yearCU11
pHinstantaneous minimumreport only (SU)all yearCU11
pHinstantaneous maximumreport only (SU)all yearCU11
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU11
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU11
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU11
Chloridedaily maximumreport only (mg/L)all yearCU11
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU11
Specific conductancedaily maximumreport only (umho/cm)all yearCU18
pHinstantaneous minimumreport only (SU)all yearCU18
pHinstantaneous maximumreport only (SU)all yearCU18
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU18
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU18
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU18
Chloridedaily maximumreport only (mg/L)all yearCU18
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU18
Specific conductancedaily maximumreport only (umho/cm)all yearCU19
pHinstantaneous minimumreport only (SU)all yearCU19
pHinstantaneous maximumreport only (SU)all yearCU19
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU19
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU19
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU19
Chloridedaily maximumreport only (mg/L)all yearCU19
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU19
Specific conductancedaily maximumreport only (umho/cm)all yearCU2
pHinstantaneous minimumreport only (SU)all yearCU2
pHinstantaneous maximumreport only (SU)all yearCU2
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU2
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU2
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU2
Chloridedaily maximumreport only (mg/L)all yearCU2
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU2
Specific conductancedaily maximumreport only (umho/cm)all yearCU20
pHinstantaneous minimumreport only (SU)all yearCU20
pHinstantaneous maximumreport only (SU)all yearCU20
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU20
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU20
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU20
Chloridedaily maximumreport only (mg/L)all yearCU20
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU20
Specific conductancedaily maximumreport only (umho/cm)all yearCU21
pHinstantaneous minimumreport only (SU)all yearCU21
pHinstantaneous maximumreport only (SU)all yearCU21
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU21
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU21
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU21
Chloridedaily maximumreport only (mg/L)all yearCU21
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU21
Specific conductancedaily maximumreport only (umho/cm)all yearCU22
pHinstantaneous minimumreport only (SU)all yearCU22
pHinstantaneous maximumreport only (SU)all yearCU22
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU22
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU22
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU22
Chloridedaily maximumreport only (mg/L)all yearCU22
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU22
Specific conductancedaily maximumreport only (umho/cm)all yearCU24
pHinstantaneous minimumreport only (SU)all yearCU24
pHinstantaneous maximumreport only (SU)all yearCU24
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU24
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU24
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU24
Chloridedaily maximumreport only (mg/L)all yearCU24
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU24
Specific conductancedaily maximumreport only (umho/cm)all yearCU3
pHinstantaneous minimumreport only (SU)all yearCU3
pHinstantaneous maximumreport only (SU)all yearCU3
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU3
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU3
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU3
Chloridedaily maximumreport only (mg/L)all yearCU3
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU3
Specific conductancedaily maximumreport only (umho/cm)all yearCU4
pHinstantaneous minimumreport only (SU)all yearCU4
pHinstantaneous maximumreport only (SU)all yearCU4
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU4
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU4
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU4
Chloridedaily maximumreport only (mg/L)all yearCU4
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU4
Specific conductancedaily maximumreport only (umho/cm)all yearCU9
pHinstantaneous minimumreport only (SU)all yearCU9
pHinstantaneous maximumreport only (SU)all yearCU9
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCU9
Fluoride, dissolved [as F]daily maximumreport only (ug/L)all yearCU9
Selenium, total recoverabledaily maximumreport only (ug/L)all yearCU9
Chloridedaily maximumreport only (mg/L)all yearCU9
Solids, total dissolveddaily maximumreport only (mg/L)all yearCU9

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/WY0048321 · MCP: https://passage-data.com/mcp