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Johns Manville, Inc.

Mineral Wool, Grambling, Louisiana. NPDES permit LA0046281, in force until Oct 14, 2028. Last 12 months: no values over a limit, 4 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A quarterly (7 values), outfall 003 form A quarterly (6 values), outfall 002 form S twice a year
Renewal application due
Apr 17, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 26 reports late

Limits in force (21)

ParameterStatisticLimitMonthsOutfall
Oxygen demand, chem. [high level] [COD]monthly average≤ 200 mg/Lall year001
Oxygen demand, chem. [high level] [COD]daily maximum≤ 300 mg/Lall year001
Solids, total suspendedmonthly average≤ 90 mg/Lall year001
Solids, total suspendeddaily maximum≤ 135 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year002
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 45 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year002
Coliform, fecal generalmonthly average≤ 200 #/100mLall year002
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year002
pHinstantaneous minimum≥ 6 SUall year003
pHinstantaneous maximum≤ 9 SUall year003
Oil & Greasedaily maximum≤ 15 mg/Lall year003
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year003

How strict are these limits?

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

Same industry: the 7 Stone, Clay, Glass and Concrete Products permits in Louisiana.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0046281 · MCP: https://passage-data.com/mcp