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Weyerhauser NR Company - Emerson Division

Softwood Veneer And Plywood, Emerson, Arkansas. NPDES permit AR0043923 expired Jun 30, 2026; its limits still apply. Last 12 months: no values over a limit, 3 of 33 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (2 values), outfall 001 form Q quarterly (12 values), outfall 007 form A monthly (2 values), outfall 007 form Q quarterly (12 values), outfall 001 form F quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 3 of 37 reports late

Limits in force (42)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/LMay–Oct001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximum≤ 22.5 mg/Lall year001
Solids, total suspendedmonthly average≤ 1.4 lb/dall year001
Solids, total suspendeddaily maximum≤ 2.2 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 6.1 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 6.1 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .5 lb/dApr001
Nitrogen, ammonia total [as N]monthly average≤ .5 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1 lb/dJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ .6 lb/dApr001
Nitrogen, ammonia total [as N]daily maximum≤ .6 lb/dMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 1.4 lb/dJan, Feb, Mar, Nov, Dec001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year001
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 1.4 lb/dall year001
Temperature, water deg. fahrenheitinstantaneous maximum≤ 86 deg Fall year007
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/Lall year007
Oxygen demand, chem. [low level] [COD]monthly average≤ 50 mg/Lall year007
Oxygen demand, chem. [low level] [COD]daily maximum≤ 75 mg/Lall year007
Oxygen demand, chem. [low level] [COD]monthly average≤ .6 lb/dall year007
Oxygen demand, chem. [low level] [COD]daily maximum≤ .9 lb/dall year007
pHminimum≥ 6 SUall year007
pHmaximum≤ 9 SUall year007
Solids, total suspendedmonthly average≤ 35 mg/Lall year007
Solids, total suspendeddaily maximum≤ 52.5 mg/Lall year007
Solids, total suspendedmonthly average≤ .4 lb/dall year007
Solids, total suspendeddaily maximum≤ .6 lb/dall year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007

How strict are these limits?

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

Same industry: the 44 Lumber and Wood Products 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/AR0043923 · MCP: https://passage-data.com/mcp