Imerys Refractory Minerals USA, Inc.

NPDES permit AL0056227 · Minor NON-POTW · effective, expires 2028-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
0required values missing, on 0 form(s)
0of 10 forms filed late

Last period with anything received: 2026-06-30.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among AL permits in EPA's filings — check your permit).

Limits in force (20)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6 SU all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 8.5 SU all year
001pHDAILY MX <= 8.5 SU all year
001Solids, total suspendedMO AVG = 20 mg/L all year
001Solids, total suspendedMO AVG = 20 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Iron, total [as Fe]DAILY AV <= .5 mg/L all year
001Iron, total [as Fe]DAILY AV <= .5 mg/L all year
001Iron, total [as Fe]DAILY MX <= 1 mg/L all year
001Iron, total [as Fe]DAILY MX <= 1 mg/L all year
001Aluminum, total [as Al]DAILY AV <= 1 mg/L all year
001Aluminum, total [as Al]DAILY AV <= 1 mg/L all year
001Aluminum, total [as Al]DAILY MX <= 2 mg/L all year
001Aluminum, total [as Al]DAILY MX <= 2 mg/L all year
001Flow, in conduit or thru treatment plantDAILY MN report only all year
001Flow, in conduit or thru treatment plantDAILY MN report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY 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