St. Marys Cement U.S. LLC

NPDES permit MI0003158 · Major NON-POTW · effective, expires 2029-10-01 · 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

10values over a limit
0required values missing, on 0 form(s)
0of 66 forms filed late

Last period with anything received: 2026-07-31. Most often over: Diesel range organics diesel, total, wtr (9), pH (1).

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 (111)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX report only all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Potassium, total [as K]DAILY MX report only all year
001Chloride [as Cl]DAILY MX report only all year
001Sulfate, total [as SO4]DAILY MX report only 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 residualDA <= 200 ug/L all year
001Chlorine, total residualINST MAX <= 300 ug/L all year
001Solids, total dissolvedDAILY MX report only all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]1D <= 2 ng/L all year
001Mercury, total [as Hg]1D <= .00005 lb/d 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 <= 9 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 45 mg/L all year
002Potassium, total [as K]DAILY MX report only all year
002Chloride [as Cl]DAILY MX report only all year
002Sulfate, total [as SO4]DAILY MX report only all year
002Benzene, ethylbenzene, toluene, xylene combinationDAILY MX <= 20 ug/L all year
002TolueneDAILY MX report only all year
002TolueneDAILY MX report only all year
002TolueneDAILY MX report only all year
002BenzeneDAILY MX <= 5 ug/L all year
002BenzeneDAILY MX report only all year
002BenzeneDAILY MX report only all year
002EthylbenzeneDAILY MX report only all year
002EthylbenzeneDAILY MX report only all year
002EthylbenzeneDAILY MX report only all year
002NaphthaleneDAILY MX <= 5 ug/L all year
002NaphthaleneDAILY MX report only all year
002NaphthaleneDAILY MX report only all year
002Equipment inspection - visualVALUE report only all year
002Diesel range organics diesel, total, wtrDAILY MX <= 100 ug/L all year
002Diesel range organics diesel, total, wtrDAILY MX report only all year
002Diesel range organics diesel, total, wtrDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only 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
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualDAILY MX <= 38 ug/L all year
002Chlorine, total residualDA <= 200 ug/L all year
002Chlorine, total residualINST MAX <= 300 ug/L all year
002Solids, total dissolvedDAILY MX report only all year
002Mercury, total [as Hg]MO AVG report only all year
002Mercury, total [as Hg]DAILY MX report only all year
002Mercury, total [as Hg]MO AVG report only all year
002Mercury, total [as Hg]DAILY MX report only all year
002Chlorination durationDAILY MX report only all year
002Chlorination durationDAILY MX <= 160 min/d all year
002Xylene [mix of m+o+p]DAILY MX report only all year
002Xylene [mix of m+o+p]DAILY MX report only all year
002Xylene [mix of m+o+p]DAILY MX report only all year
002Outfall observation,visual, y/n responseVALUE report only all year
003pHDAILY MN >= 6.5 SU all year
003pHDAILY MX <= 9 SU all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedDAILY MX <= 45 mg/L all year
003Potassium, total [as K]DAILY MX report only all year
003Chloride [as Cl]DAILY MX report only all year
003Sulfate, total [as SO4]DAILY MX report only 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
003Solids, total dissolvedDAILY MX report only all year
003Outfall observation,visual, y/n responseVALUE report only all year
004pHDAILY MN >= 6.5 SU all year
004pHDAILY MX <= 9 SU all year
004Potassium, total [as K]DAILY MX report only all year
004Chloride [as Cl]DAILY MX report only all year
004Sulfate, total [as SO4]DAILY MX report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Solids, total dissolvedDAILY MX report only all year
004Mercury, total [as Hg]MO AVG report only all year
004Mercury, total [as Hg]DAILY MX report only all year
004Mercury, total [as Hg]MO AVG report only all year
004Mercury, total [as Hg]DAILY MX report only all year
004Outfall observation,visual, y/n responseVALUE report only all year
005Temperature, water deg. fahrenheitDAILY MX report only all year
005ConductivityDAILY MX report only all year
005pHDAILY MN >= 6.5 SU all year
005pHDAILY MX <= 9 SU all year
005Solids, total suspendedMO AVG <= 30 mg/L all year
005Solids, total suspendedDAILY MX <= 45 mg/L all year
005Sulfide, dissolved, [as S]DAILY MX report only all year
005Hardness, total [as CaCO3]DAILY MX report only all year
005Chloride [as Cl]DAILY MX report only all year
005Sulfate, total [as SO4]DAILY MX report only all year
005Cadmium, total [as Cd]DAILY MX report only all year
005Copper, total [as Cu]DAILY MX report only all year
005Manganese, total [as Mn]DAILY MX report only all year
005Nickel, total [as Ni]DAILY MX report only all year
005Zinc, total [as Zn]DAILY MX report only all year
005Lithium, total [as Li]DAILY MX report only all year
005Selenium, total [as Se]DAILY MX report only all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Solids, total dissolvedDAILY MX report only all year
005Outfall 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