US SILICA CO

NPDES permit PA0125334 · Minor NON-POTW · effective, expires 2028-09-20 · 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

0values over a limit
300required values missing, on 24 form(s)
0of 80 forms filed late

Last period with anything received: 2026-03-31.

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (200)

OutfallParameterStatisticLimitMonths
005pHINST MIN >= 6 SU all year
005pHINST MIN >= 6 SU all year
005pHINST MAX <= 9 SU all year
005pHINST MAX <= 9 SU all year
005Solids, total suspendedMO AVG <= 35 mg/L all year
005Solids, total suspendedMO AVG <= 35 mg/L all year
005Solids, total suspendedDAILY MX <= 70 mg/L all year
005Solids, total suspendedDAILY MX <= 70 mg/L all year
005Solids, total suspendedINST MAX <= 90 mg/L all year
005Solids, total suspendedINST MAX <= 90 mg/L all year
005Iron, total [as Fe]MO AVG <= 3 mg/L all year
005Iron, total [as Fe]MO AVG <= 3 mg/L all year
005Iron, total [as Fe]DAILY MX <= 6 mg/L all year
005Iron, total [as Fe]DAILY MX <= 6 mg/L all year
005Iron, total [as Fe]INST MAX <= 7 mg/L all year
005Iron, total [as Fe]INST MAX <= 7 mg/L all year
005Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
005Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
006pHINST MIN >= 6 SU all year
006pHINST MIN >= 6 SU all year
006pHINST MAX <= 9 SU all year
006pHINST MAX <= 9 SU all year
006Solids, total suspendedMO AVG <= 35 mg/L all year
006Solids, total suspendedMO AVG <= 35 mg/L all year
006Solids, total suspendedDAILY MX <= 70 mg/L all year
006Solids, total suspendedDAILY MX <= 70 mg/L all year
006Solids, total suspendedINST MAX <= 90 mg/L all year
006Solids, total suspendedINST MAX <= 90 mg/L all year
006Iron, total [as Fe]MO AVG <= 3 mg/L all year
006Iron, total [as Fe]MO AVG <= 3 mg/L all year
006Iron, total [as Fe]DAILY MX <= 6 mg/L all year
006Iron, total [as Fe]DAILY MX <= 6 mg/L all year
006Iron, total [as Fe]INST MAX <= 7 mg/L all year
006Iron, total [as Fe]INST MAX <= 7 mg/L all year
006Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
006Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
008pHINST MIN >= 6 SU all year
008pHINST MIN >= 6 SU all year
008pHINST MAX <= 9 SU all year
008pHINST MAX <= 9 SU all year
008pHINST MIN >= 6 SU all year
008pHINST MIN >= 6 SU all year
008pHINST MAX <= 9 SU all year
008pHINST MAX <= 9 SU all year
008pHINST MIN >= 6 SU all year
008pHINST MIN >= 6 SU all year
008pHINST MAX <= 9 SU all year
008pHINST MAX <= 9 SU all year
008Solids, total suspendedMO AVG <= 35 mg/L all year
008Solids, total suspendedMO AVG <= 35 mg/L all year
008Solids, total suspendedDAILY MX <= 70 mg/L all year
008Solids, total suspendedDAILY MX <= 70 mg/L all year
008Solids, total suspendedINST MAX <= 90 mg/L all year
008Solids, total suspendedINST MAX <= 90 mg/L all year
008Solids, settleableINST MAX <= .5 mL/L all year
008Solids, settleableINST MAX <= .5 mL/L all year
008Iron, total [as Fe]MO AVG <= 3 mg/L all year
008Iron, total [as Fe]MO AVG <= 3 mg/L all year
008Iron, total [as Fe]DAILY MX <= 6 mg/L all year
008Iron, total [as Fe]DAILY MX <= 6 mg/L all year
008Iron, total [as Fe]INST MAX <= 7 mg/L all year
008Iron, total [as Fe]INST MAX <= 7 mg/L all year
008Iron, total [as Fe]INST MAX <= 7 mg/L all year
008Iron, total [as Fe]INST MAX <= 7 mg/L all year
008Flow, in conduit or thru treatment plantINST MAX report only all year
008Flow, in conduit or thru treatment plantINST MAX report only all year
008Flow, in conduit or thru treatment plantINST MAX report only all year
008Flow, in conduit or thru treatment plantINST MAX report only all year
009pHINST MIN >= 6 SU all year
009pHINST MIN >= 6 SU all year
009pHINST MAX <= 9 SU all year
009pHINST MAX <= 9 SU all year
009pHINST MIN >= 6 SU all year
009pHINST MIN >= 6 SU all year
009pHINST MAX <= 9 SU all year
009pHINST MAX <= 9 SU all year
009pHINST MIN >= 6 SU all year
009pHINST MIN >= 6 SU all year
009pHINST MAX <= 9 SU all year
009pHINST MAX <= 9 SU all year
009Solids, total suspendedMO AVG <= 35 mg/L all year
009Solids, total suspendedMO AVG <= 35 mg/L all year
009Solids, total suspendedDAILY MX <= 70 mg/L all year
009Solids, total suspendedDAILY MX <= 70 mg/L all year
009Solids, total suspendedINST MAX <= 90 mg/L all year
009Solids, total suspendedINST MAX <= 90 mg/L all year
009Solids, settleableINST MAX <= .5 mL/L all year
009Solids, settleableINST MAX <= .5 mL/L all year
009Iron, total [as Fe]MO AVG <= 3 mg/L all year
009Iron, total [as Fe]MO AVG <= 3 mg/L all year
009Iron, total [as Fe]DAILY MX <= 6 mg/L all year
009Iron, total [as Fe]DAILY MX <= 6 mg/L all year
009Iron, total [as Fe]INST MAX <= 7 mg/L all year
009Iron, total [as Fe]INST MAX <= 7 mg/L all year
009Iron, total [as Fe]INST MAX <= 7 mg/L all year
009Iron, total [as Fe]INST MAX <= 7 mg/L all year
009Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
009Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
009Flow, in conduit or thru treatment plantINST MAX report only all year
009Flow, in conduit or thru treatment plantINST MAX report only all year
010pHINST MIN >= 6 SU all year
010pHINST MIN >= 6 SU all year
010pHINST MAX <= 9 SU all year
010pHINST MAX <= 9 SU all year
010Solids, total suspendedMO AVG <= 30 mg/L all year
010Solids, total suspendedMO AVG <= 30 mg/L all year
010Solids, total suspendedDAILY MX <= 60 mg/L all year
010Solids, total suspendedDAILY MX <= 60 mg/L all year
010Solids, total suspendedINST MAX <= 75 mg/L all year
010Solids, total suspendedINST MAX <= 75 mg/L all year
010Iron, total [as Fe]MO AVG <= 3 mg/L all year
010Iron, total [as Fe]MO AVG <= 3 mg/L all year
010Iron, total [as Fe]DAILY MX <= 6 mg/L all year
010Iron, total [as Fe]DAILY MX <= 6 mg/L all year
010Iron, total [as Fe]INST MAX <= 7 mg/L all year
010Iron, total [as Fe]INST MAX <= 7 mg/L all year
010Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
010Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
011pHINST MIN >= 6 SU all year
011pHINST MIN >= 6 SU all year
011pHINST MAX <= 9 SU all year
011pHINST MAX <= 9 SU all year
011Solids, total suspendedMO AVG <= 30 mg/L all year
011Solids, total suspendedMO AVG <= 30 mg/L all year
011Solids, total suspendedDAILY MX <= 60 mg/L all year
011Solids, total suspendedDAILY MX <= 60 mg/L all year
011Solids, total suspendedINST MAX <= 75 mg/L all year
011Solids, total suspendedINST MAX <= 75 mg/L all year
011Iron, total [as Fe]MO AVG <= 3 mg/L all year
011Iron, total [as Fe]MO AVG <= 3 mg/L all year
011Iron, total [as Fe]DAILY MX <= 6 mg/L all year
011Iron, total [as Fe]DAILY MX <= 6 mg/L all year
011Iron, total [as Fe]INST MAX <= 7 mg/L all year
011Iron, total [as Fe]INST MAX <= 7 mg/L all year
011Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
011Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
013NpHINST MIN >= 6 SU all year
013NpHINST MIN >= 6 SU all year
013NpHINST MAX <= 9 SU all year
013NpHINST MAX <= 9 SU all year
013NpHINST MIN >= 6 SU all year
013NpHINST MIN >= 6 SU all year
013NpHINST MAX <= 9 SU all year
013NpHINST MAX <= 9 SU all year
013NpHINST MIN >= 6 SU all year
013NpHINST MIN >= 6 SU all year
013NpHINST MAX <= 9 SU all year
013NpHINST MAX <= 9 SU all year
013NSolids, total suspendedMO AVG <= 35 mg/L all year
013NSolids, total suspendedMO AVG <= 35 mg/L all year
013NSolids, total suspendedDAILY MX <= 70 mg/L all year
013NSolids, total suspendedDAILY MX <= 70 mg/L all year
013NSolids, total suspendedINST MAX <= 90 mg/L all year
013NSolids, total suspendedINST MAX <= 90 mg/L all year
013NSolids, settleableINST MAX <= .5 mL/L all year
013NSolids, settleableINST MAX <= .5 mL/L all year
013NIron, total [as Fe]MO AVG <= 3 mg/L all year
013NIron, total [as Fe]MO AVG <= 3 mg/L all year
013NIron, total [as Fe]DAILY MX <= 6 mg/L all year
013NIron, total [as Fe]DAILY MX <= 6 mg/L all year
013NIron, total [as Fe]INST MAX <= 7 mg/L all year
013NIron, total [as Fe]INST MAX <= 7 mg/L all year
013NIron, total [as Fe]INST MAX <= 7 mg/L all year
013NIron, total [as Fe]INST MAX <= 7 mg/L all year
013NFlow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
013NFlow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
013NFlow, in conduit or thru treatment plantINST MAX report only all year
013NFlow, in conduit or thru treatment plantINST MAX report only all year
015pHINST MIN >= 6 SU all year
015pHINST MIN >= 6 SU all year
015pHINST MAX <= 9 SU all year
015pHINST MAX <= 9 SU all year
015pHINST MIN >= 6 SU all year
015pHINST MIN >= 6 SU all year
015pHINST MAX <= 9 SU all year
015pHINST MAX <= 9 SU all year
015pHINST MIN >= 6 SU all year
015pHINST MIN >= 6 SU all year
015pHINST MAX <= 9 SU all year
015pHINST MAX <= 9 SU all year
015Solids, total suspendedMO AVG <= 35 mg/L all year
015Solids, total suspendedMO AVG <= 35 mg/L all year
015Solids, total suspendedDAILY MX <= 70 mg/L all year
015Solids, total suspendedDAILY MX <= 70 mg/L all year
015Solids, total suspendedINST MAX <= 90 mg/L all year
015Solids, total suspendedINST MAX <= 90 mg/L all year
015Solids, settleableINST MAX <= .5 mL/L all year
015Solids, settleableINST MAX <= .5 mL/L all year
015Iron, total [as Fe]MO AVG <= 3 mg/L all year
015Iron, total [as Fe]MO AVG <= 3 mg/L all year
015Iron, total [as Fe]DAILY MX <= 6 mg/L all year
015Iron, total [as Fe]DAILY MX <= 6 mg/L all year
015Iron, total [as Fe]INST MAX <= 7 mg/L all year
015Iron, total [as Fe]INST MAX <= 7 mg/L all year
015Iron, total [as Fe]INST MAX <= 7 mg/L all year
015Iron, total [as Fe]INST MAX <= 7 mg/L all year
015Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
015Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
015Flow, in conduit or thru treatment plantINST MAX report only all year
015Flow, in conduit or thru treatment plantINST MAX 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