U.S. Silica Company

NPDES permit MI0001368 · Major NON-POTW · administratively continued, expires 2018-09-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2018-09-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
0required values missing, on 0 form(s)
0of 24 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 21 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (74)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. fahrenheitDAILY MX report only all year
002ConductivityDAILY MX report only all year
002Sulfate [as S]DAILY MX report only all year
002Oxygen, dissolved [DO]DAILY MN >= 3 mg/L all year
002pHDAILY MN >= 6.5 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Solids, total suspendedMO AVG <= 20 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Solids, total suspendedMO AVG <= 2800 lb/d all year
002Solids, total suspendedDAILY MX <= 4100 lb/d all year
002Solids, total suspendedMX MO AV <= 20 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Solids, total suspendedMX MO AV <= 2800 lb/d all year
002Solids, total suspendedDAILY MX <= 4100 lb/d all year
002Chloride [as Cl]DAILY MX report only all year
002Sulfate, dissolved [as SO4]DAILY MX report only all year
002Copper, total [as Cu]MO AVG report only all year
002Copper, total [as Cu]DAILY MX report only all year
002Copper, total [as Cu]MO AVG report only all year
002Copper, total [as Cu]DAILY MX report only all year
002Copper, total [as Cu]MO AVG <= 33 ug/L all year
002Copper, total [as Cu]DAILY MX report only all year
002Copper, total [as Cu]MO AVG <= 4.5 lb/d all year
002Copper, total [as Cu]DAILY MX report only all year
002Copper, total [as Cu]MX MO AV <= 33 ug/L all year
002Copper, total [as Cu]MX MO AV <= 4.5 lb/d all year
002Toxicity, choice of speciesMO AVG <= 1 tox chronic all year
002Toxicity, choice of speciesDAILY MX 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 plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plantMX MO AV report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Toxicity [acute], Ceriodaphnia dubiaDAILY MX report only all year
002Solids, total dissolvedDAILY MX report only all year
002Hydrogen sulfideDAILY MX report only all year
002SulfateDAILY MX report only all year
002Outfall observation,visual, y/n responseVALUE report only all year
002TU Static 24 Hr Acute Pimephales promelasDAILY MX report only all year
002Static 48 Hr Chronic Pimphales PromelasMO AVG <= 1 tox chronic all year
002Static 48 Hr Chronic Pimphales PromelasDAILY MX report only all year
003Temperature, water deg. fahrenheitDAILY MX report only all year
003ConductivityDAILY MX report only all year
003Sulfate [as S]DAILY MX report only all year
003Oxygen, dissolved [DO]DAILY MN >= 3 mg/L all year
003pHDAILY MN >= 6.5 SU all year
003pHDAILY MX <= 9 SU all year
003Solids, total suspendedMO AVG report only all year
003Solids, total suspendedDAILY MX report only all year
003Solids, total suspendedMO AVG report only all year
003Solids, total suspendedDAILY MX report only all year
003Chloride [as Cl]DAILY MX report only all year
003Sulfate, dissolved [as SO4]DAILY MX report only all year
003Copper, total [as Cu]MO AVG report only all year
003Copper, total [as Cu]DAILY MX report only all year
003Copper, total [as Cu]MO AVG report only all year
003Copper, total [as Cu]DAILY MX report only all year
003Toxicity, choice of speciesMO AVG <= 1 tox chronic all year
003Toxicity, choice of speciesDAILY 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
003Toxicity [acute], Ceriodaphnia dubiaDAILY MX report only all year
003Solids, total dissolvedDAILY MX report only all year
003Hydrogen sulfideDAILY MX report only all year
003SulfateDAILY MX report only all year
003Outfall observation,visual, y/n responseVALUE report only all year
003TU Static 24 Hr Acute Pimephales promelasDAILY MX report only all year
003Static 48 Hr Chronic Pimphales PromelasMO AVG <= 1 tox chronic all year
003Static 48 Hr Chronic Pimphales PromelasDAILY 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