Martin Marietta Magnesia Specialties, LLC

NPDES permit MI0004154 · Major NON-POTW · effective, expires 2026-10-01 · 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 33 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 21 days after each monitoring period ends (the most common figure among MI permits in EPA's filings — check your permit).

Limits in force (51)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX report only all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU 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
001Chlorine, total residualDAILY MX <= 38 ug/L all year
001Chlorine, total residualINST MAX = 300 ug/L all year
001Chlorine, total residualDAILY MX <= 200 ug/L all year
001Chlorination durationDAILY MX report only all year
001Chlorination durationDAILY MX = 160 min/d all year
001Outfall observation,visual, y/n responseVALUE report only all year
002Temperature, water deg. fahrenheitDAILY MX report only all year
002pHDAILY MN >= 6.5 SU all year
002pHDAILY MX <= 10.5 SU all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualDAILY MX <= 38 ug/L all year
002Chlorine, total residualINST MAX = 300 ug/L all year
002Chlorine, total residualDAILY MX <= 200 ug/L all year
002Length of longest pH excursionINST MAX = 60 min all year
002Chlorination durationDAILY MX report only all year
002Chlorination durationDAILY MX = 160 min/d all year
002pH range excursions, monthly total accumMO MAX = 446 min all year
002pH range excursions, monthly total accumDAILY MX report only all year
002Outfall observation,visual, y/n responseVALUE report only all year
003pHDAILY MN >= 6.5 SU all year
003pHDAILY MX <= 10.5 SU all year
003Solids, total suspendedMO AVG <= 100 mg/L all year
003Solids, total suspendedDAILY MX <= 120 mg/L all year
003Solids, total suspendedMO AVG <= 559 lb/d all year
003Solids, total suspendedDAILY MX <= 795 lb/d all year
003Chloride [as Cl]MO AVG report only all year
003Chloride [as Cl]DAILY MX report only all year
003Chloride [as Cl]MO AVG <= 423000 lb/d all year
003Chloride [as Cl]DAILY MX <= 462000 lb/d all year
003HexachlorobenzeneDAILY MX < .01 ug/L all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Chlorine, total residualDAILY MX <= 1.63 mg/L all year
003Chlorine, total residualDAILY MX <= 8.6 mg/L all year
003Toxicity [acute], Ceriodaphnia dubiaMO AVG <= 38 tox acute all year
003Toxicity [acute], Ceriodaphnia dubiaDAILY MX <= 43 tox acute all year
003Solids, total dissolvedMO AVG report only all year
003Solids, total dissolvedDAILY MX report only all year
003Solids, total dissolvedMO AVG <= 750000 lb/d all year
003Solids, total dissolvedDAILY MX <= 1100000 lb/d all year
003Solids, total dissolvedMO AVG = 9 % all year
003Solids, total dissolvedDAILY MX = 17.5 % all year
003Chlorination durationDAILY MX report only all year
003Chlorination durationDAILY MX = 160 min/d all year
003Outfall observation,visual, y/n responseVALUE 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