AEROJET ROCKETDYNE, INC.

NPDES permit AR0051071 · Minor NON-POTW · administratively continued, expires 2025-10-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2025-10-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

1values over a limit
56required values missing, on 2 form(s)
4of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (1).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (28)

OutfallParameterStatisticLimitMonths
001Oxygen demand, chem. [low level] [COD]MO AVG <= 100 mg/L all year
001Oxygen demand, chem. [low level] [COD]DAILY MX <= 150 mg/L all year
001Oxygen demand, chem. [low level] [COD]MO AVG <= 36 lb/d all year
001Oxygen demand, chem. [low level] [COD]DAILY MX <= 54 lb/d all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 20 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Solids, total suspendedMO AVG <= 7.2 lb/d all year
001Solids, total suspendedDAILY MX <= 10.8 lb/d all year
001Oil & GreaseMO AVG <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Oil & GreaseMO AVG <= 3.6 lb/d all year
001Oil & GreaseDAILY MX <= 5.4 lb/d all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Perchlorate [ClO4]MO AVG <= .025 mg/L all year
001Perchlorate [ClO4]DAILY MX <= .038 mg/L all year
001Perchlorate [ClO4]MO AVG <= .008 lb/d all year
001Perchlorate [ClO4]DAILY MX <= .013 lb/d all year
001RDX, totalMO AVG <= .1 mg/L all year
001RDX, totalDAILY MX <= .15 mg/L all year
001RDX, totalMO AVG <= .04 lb/d all year
001RDX, totalDAILY MX <= .05 lb/d all year
001HMXMO AVG <= 1.8 mg/L all year
001HMXDAILY MX <= 2.7 mg/L all year
001HMXMO AVG <= .6 lb/d all year
001HMXDAILY MX <= 1 lb/d all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states