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Bentonite Performance Minerals, LLC

Clay And Related Minerals, Hulett, Wyoming. NPDES permit WY0096563 expired Jul 24, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form BM quarterly (5 values), outfall 002 form BM quarterly (5 values), outfall 003 form BM quarterly (5 values), outfall 004 form BM quarterly (5 values), outfall DMP1 form MS quarterly (1 value), outfall UMP1 form MS quarterly (1 value)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 72 reports late

Limits in force (22)

ParameterStatisticLimitMonthsOutfall
Specific conductancedaily maximum≤ 7500 umho/cmall year001
pHinstantaneous minimum≥ 6.5 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total dissolveddaily maximum≤ 5000 mg/Lall year001
Specific conductancedaily maximum≤ 7500 umho/cmall year002
pHinstantaneous minimum≥ 6.5 SUall year002
pHinstantaneous maximum≤ 9 SUall year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Solids, total dissolveddaily maximum≤ 5000 mg/Lall year002
Specific conductancedaily maximum≤ 7500 umho/cmall year003
pHinstantaneous minimum≥ 6.5 SUall year003
pHinstantaneous maximum≤ 9 SUall year003
Solids, total suspendeddaily maximumreport only (mg/L)all year003
Solids, total dissolveddaily maximum≤ 5000 mg/Lall year003
Specific conductancedaily maximum≤ 7500 umho/cmall year004
pHinstantaneous minimum≥ 6.5 SUall year004
pHinstantaneous maximum≤ 9 SUall year004
Solids, total suspendeddaily maximumreport only (mg/L)all year004
Solids, total dissolveddaily maximum≤ 5000 mg/Lall year004
Solids, total suspendeddaily maximumreport only (mg/L)all yearDMP1
Solids, total suspendeddaily maximumreport only (mg/L)all yearUMP1

How strict are these limits?

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

Same industry: the 8 Mining and Quarrying of Nonmetallic Minerals 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/WY0096563 · MCP: https://passage-data.com/mcp