ARCONIC US LLC

NPDES permit IA0003395 · Major NON-POTW · effective, expires 2030-12-31 · 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.

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

6values over a limit
0required values missing, on 0 form(s)
0of 46 forms filed late

Last period with anything received: 2026-07-31. Most often over: pH (2), Aluminum, total [as Al] (2), Solids, total suspended (2).

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among IA permits in EPA's filings — check your permit).

Limits in force (41)

OutfallParameterStatisticLimitMonths
007pHDAILY MN >= 6 SU all year
007pHDAILY MX <= 9 SU all year
007TetrachloroetheneDAILY MX <= .033 mg/L all year
007Tetrachloroethene30DA AVG report only all year
007TetrachloroetheneDAILY MX report only all year
007TrichloroetheneDAILY MX <= .01 mg/L all year
007Trichloroethene30DA AVG report only all year
007TrichloroetheneDAILY MX report only all year
007cis-1,2-DichloroetheneDAILY MX <= .078 mg/L all year
007cis-1,2-Dichloroethene30DA AVG report only all year
007cis-1,2-DichloroetheneDAILY MX report only all year
009pHDAILY MN >= 7 SU all year
009pHDAILY MX <= 10 SU all year
009Solids, total suspended30DA AVG <= 290.4 lb/d all year
009Solids, total suspendedDAILY MX <= 555.9 lb/d all year
009Oil & Grease30DA AVG <= 192.8 lb/d all year
009Oil & GreaseDAILY MX <= 285.5 lb/d all year
009Nitrogen, total [as N]30DA AVG report only all year
009Nitrogen, total [as N]DAILY MX report only all year
009Nitrogen, total [as N]30DA AVG report only all year
009Nitrogen, total [as N]DAILY MX report only all year
009Phosphorus, total [as P]30DA AVG report only all year
009Phosphorus, total [as P]DAILY MX report only all year
009Phosphorus, total [as P]30DA AVG report only all year
009Phosphorus, total [as P]DAILY MX report only all year
009Cyanide, total [as CN]30DA AVG <= .8 lb/d all year
009Cyanide, total [as CN]DAILY MX <= 1.94 lb/d all year
009Chromium, total [as Cr]30DA AVG <= 1.31 lb/d all year
009Chromium, total [as Cr]DAILY MX <= 3.19 lb/d all year
009Zinc, total [as Zn]30DA AVG <= 5.01 lb/d all year
009Zinc, total [as Zn]DAILY MX <= 12.08 lb/d all year
009Aluminum, total [as Al]30DA AVG <= 29 lb/d all year
009Aluminum, total [as Al]DAILY MX <= 61.8 lb/d all year
009Chlorine, total residual30DA AVG <= .604 mg/L all year
009Chlorine, total residualDAILY MX <= .604 mg/L all year
009Chlorine, total residual30DA AVG <= 2.77 lb/d all year
009Chlorine, total residualDAILY MX <= 2.77 lb/d all year
009Toxicity [acute], Ceriodaphnia dubiaDAILY MX <= 1 N=0;Y=1 all year
009Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX <= 1 N=0;Y=1 all year
009Precipitation volume30DA AVG report only all year
009Precipitation volumeDAILY MX report only 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