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Halliburton Energy Services, Inc - Magcobar Mine Site

Chemical And Fertilizer Mining, major discharger, Malvern, Arkansas. NPDES permit AR0049794, in force until May 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (64 values), outfall TX1 form Q quarterly (14 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 16 reports late

Limits in force (78)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Chloride [as Cl]monthly average≤ 68 mg/Lall year001
Chloride [as Cl]daily maximum≤ 102 mg/Lall year001
Chloride [as Cl]monthly average≤ 1871.5 lb/dall year001
Chloride [as Cl]daily maximum≤ 2807.2 lb/dall year001
Sulfate, total [as SO4]monthly average≤ 1384 mg/Lall year001
Sulfate, total [as SO4]daily maximum≤ 2076 mg/Lall year001
Sulfate, total [as SO4]monthly average≤ 38090.4 lb/dall year001
Sulfate, total [as SO4]daily maximum≤ 57135.7 lb/dall year001
Iron, total recoverablemonthly averagereport only (ug/L)all year001
Iron, total recoverabledaily maximumreport only (ug/L)all year001
Iron, total recoverablemonthly averagereport only (lb/d)all year001
Iron, total recoverabledaily maximumreport only (lb/d)all year001
Selenium, total recoverablemonthly average≤ 5.58 ug/Lall year001
Selenium, total recoverabledaily maximum≤ 11.2 ug/Lall year001
Selenium, total recoverablemonthly average≤ .154 lb/dall year001
Selenium, total recoverabledaily maximum≤ .308 lb/dall year001
Beryllium, total recoverable [as Be]monthly average≤ 4 ug/Lall year001
Beryllium, total recoverable [as Be]daily maximum≤ 6.56 ug/Lall year001
Beryllium, total recoverable [as Be]monthly average≤ .11 lb/dall year001
Beryllium, total recoverable [as Be]daily maximum≤ .181 lb/dall year001
Barium, total recoverablemonthly averagereport only (ug/L)all year001
Barium, total recoverabledaily maximumreport only (ug/L)all year001
Barium, total recoverablemonthly averagereport only (lb/d)all year001
Barium, total recoverabledaily maximumreport only (lb/d)all year001
Nickel, total recoverablemonthly average≤ 108 ug/Lall year001
Nickel, total recoverabledaily maximum≤ 217 ug/Lall year001
Nickel, total recoverablemonthly average≤ 2.972 lb/dall year001
Nickel, total recoverabledaily maximum≤ 5.972 lb/dall year001
Silver total recoverablemonthly average≤ 1.36 ug/Lall year001
Silver total recoverabledaily maximum≤ 2.73 ug/Lall year001
Silver total recoverablemonthly average≤ .037 lb/dall year001
Silver total recoverabledaily maximum≤ .075 lb/dall year001
Zinc, total recoverablemonthly average≤ 95 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 191 ug/Lall year001
Zinc, total recoverablemonthly average≤ 2.615 lb/dall year001
Zinc, total recoverabledaily maximum≤ 5.257 lb/dall year001
Aluminum, total recoverablemonthly averagereport only (ug/L)all year001
Aluminum, total recoverabledaily maximumreport only (ug/L)all year001
Aluminum, total recoverablemonthly averagereport only (lb/d)all year001
Aluminum, total recoverabledaily maximumreport only (lb/d)all year001
Cadmium, total recoverablemonthly average≤ 2.25 ug/Lall year001
Cadmium, total recoverabledaily maximum≤ 4.52 ug/Lall year001
Cadmium, total recoverablemonthly average≤ .062 lb/dall year001
Cadmium, total recoverabledaily maximum≤ .124 lb/dall year001
Lead, total recoverablemonthly average≤ 3.24 ug/Lall year001
Lead, total recoverabledaily maximum≤ 6.5 ug/Lall year001
Lead, total recoverablemonthly average≤ .089 lb/dall year001
Lead, total recoverabledaily maximum≤ .179 lb/dall year001
Copper, total recoverablemonthly average≤ 10.5 ug/Lall year001
Copper, total recoverabledaily maximum≤ 21 ug/Lall year001
Copper, total recoverablemonthly average≤ .289 lb/dall year001
Copper, total recoverabledaily maximum≤ .578 lb/dall year001
Manganese, total recoverablemonthly averagereport only (ug/L)all year001
Manganese, total recoverabledaily maximumreport only (ug/L)all year001
Manganese, total recoverablemonthly averagereport only (lb/d)all year001
Manganese, total recoverabledaily maximumreport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Solids, total dissolvedmonthly average≤ 2261 mg/Lall year001
Solids, total dissolveddaily maximum≤ 3391.5 mg/Lall year001
Solids, total dissolvedmonthly average≤ 62227.2 lb/dall year001
Solids, total dissolveddaily maximum≤ 93340.9 lb/dall year001
Whole Effluent Toxicity [WET] - C. dubia7-day minimum> 100 %all yearTX1
Whole Effluent Toxicity [WET] - C. dubia7-day minimum> 80 %all yearTX1
Whole Effluent Toxicity [WET] - P. promelas7-day minimum> 100 %all yearTX1
Whole Effluent Toxicity [WET] - P. promelas7-day minimum> 80 %all yearTX1
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX1
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX1

How strict are these limits?

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

Same industry: the 30 Mining and Quarrying of Nonmetallic Minerals permits in Arkansas.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0049794 · MCP: https://passage-data.com/mcp