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Aerojet Rocketdyne, Inc.

Ammunition, Except For Small Arms, Highland Industrial Park, Arkansas. NPDES permit AR0051071 expired Oct 31, 2025; its limits still apply. Last 12 months: over a limit once (last January 2026), 28 required values missing, 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (28 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 28 required values missing, 1 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
January 2026Solids, total suspended, monthly average24 mg/L≤ 20 mg/L20%

Limits in force (28)

ParameterStatisticLimitMonths
Oxygen demand, chem. [low level] [COD]monthly average≤ 100 mg/Lall year
Oxygen demand, chem. [low level] [COD]daily maximum≤ 150 mg/Lall year
Oxygen demand, chem. [low level] [COD]monthly average≤ 36 lb/dall year
Oxygen demand, chem. [low level] [COD]daily maximum≤ 54 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 7.2 lb/dall year
Solids, total suspendeddaily maximum≤ 10.8 lb/dall year
Oil & Greasemonthly average≤ 10 mg/Lall year
Oil & Greasedaily maximum≤ 15 mg/Lall year
Oil & Greasemonthly average≤ 3.6 lb/dall year
Oil & Greasedaily maximum≤ 5.4 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Perchlorate [ClO4]monthly average≤ .025 mg/Lall year
Perchlorate [ClO4]daily maximum≤ .038 mg/Lall year
Perchlorate [ClO4]monthly average≤ .008 lb/dall year
Perchlorate [ClO4]daily maximum≤ .013 lb/dall year
RDX, totalmonthly average≤ .1 mg/Lall year
RDX, totaldaily maximum≤ .15 mg/Lall year
RDX, totalmonthly average≤ .04 lb/dall year
RDX, totaldaily maximum≤ .05 lb/dall year
HMXmonthly average≤ 1.8 mg/Lall year
HMXdaily maximum≤ 2.7 mg/Lall year
HMXmonthly average≤ .6 lb/dall year
HMXdaily maximum≤ 1 lb/dall year

How strict are these limits?

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

Same industry: the 4 Fabricated Metal 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/AR0051071 · MCP: https://passage-data.com/mcp