GERDAU

NPDES permit IA0061972 · Minor NON-POTW · effective, expires 2028-02-29 · 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

7values over a limit
0required values missing, on 0 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Copper, total [as Cu] (5), Iron, total [as Fe] (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 (30)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspended30DA AVG <= 22 lb/d all year
001Solids, total suspendedDAILY MX <= 33 lb/d all year
001Oil & Grease30DA AVG <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Oil & Grease30DA AVG <= 7 lb/d all year
001Oil & GreaseDAILY MX <= 11 lb/d all year
001Copper, total [as Cu]30DA AVG <= .03898 mg/L all year
001Copper, total [as Cu]DAILY MX <= .03898 mg/L all year
001Copper, total [as Cu]30DA AVG <= .2711 lb/d all year
001Copper, total [as Cu]DAILY MX <= .2711 lb/d all year
001Iron, total [as Fe]30DA AVG <= 1 mg/L all year
001Iron, total [as Fe]DAILY MX <= 1 mg/L all year
001Iron, total [as Fe]30DA AVG <= 8.273 lb/d all year
001Iron, total [as Fe]DAILY MX <= 8.273 lb/d all year
001Lead, total [as Pb]30DA AVG <= .062 mg/L all year
001Lead, total [as Pb]DAILY MX <= .185 mg/L all year
001Lead, total [as Pb]30DA AVG <= .072 lb/d all year
001Lead, total [as Pb]DAILY MX <= .216 lb/d all year
001Zinc, total [as Zn]30DA AVG <= .092 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .243 mg/L all year
001Zinc, total [as Zn]30DA AVG <= .108 lb/d all year
001Zinc, total [as Zn]DAILY MX <= .324 lb/d all year
001Chlorine, total residual30DA AVG <= .052 mg/L all year
001Chlorine, total residualDAILY MX <= .052 mg/L all year
001Chlorine, total residual30DA AVG <= .219 lb/d all year
001Chlorine, total residualDAILY MX <= .219 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