US SILICA CO

NPDES permit PA0279340 · Minor NON-POTW · effective, expires 2030-05-18 · 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
96required values missing, on 6 form(s)
0of 21 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 (65)

OutfallParameterStatisticLimitMonths
003ATemperature, water deg. centigradeINST MAX report only all year
003ATemperature, water deg. centigradeINST MAX report only all year
003ASpecific conductanceINST MAX report only all year
003ASpecific conductanceINST MAX report only all year
003ApHINST MIN >= 6 SU all year
003ApHINST MIN >= 6 SU all year
003ApHINST MAX <= 9 SU all year
003ApHINST MAX <= 9 SU all year
003ASolids, total suspendedMO AVG <= 35 mg/L all year
003ASolids, total suspendedMO AVG <= 35 mg/L all year
003ASolids, total suspendedDAILY MX <= 70 mg/L all year
003ASolids, total suspendedDAILY MX <= 70 mg/L all year
003ASolids, total suspendedINST MAX <= 90 mg/L all year
003ASolids, total suspendedINST MAX <= 90 mg/L all year
003ASulfate, total [as SO4]INST MAX report only all year
003ASulfate, total [as SO4]INST MAX report only all year
003AIron, total [as Fe]MO AVG <= 2 mg/L all year
003AIron, total [as Fe]MO AVG <= 2 mg/L all year
003AIron, total [as Fe]DAILY MX <= 4 mg/L all year
003AIron, total [as Fe]DAILY MX <= 4 mg/L all year
003AIron, total [as Fe]INST MAX <= 5 mg/L all year
003AIron, total [as Fe]INST MAX <= 5 mg/L all year
003AManganese, total [as Mn]INST MAX report only all year
003AManganese, total [as Mn]INST MAX report only all year
003AAluminum, total [as Al]MO AVG <= .75 mg/L all year
003AAluminum, total [as Al]MO AVG <= .75 mg/L all year
003AAluminum, total [as Al]DAILY MX <= 1.5 mg/L all year
003AAluminum, total [as Al]DAILY MX <= 1.5 mg/L all year
003AAluminum, total [as Al]INST MAX <= 1.8 mg/L all year
003AAluminum, total [as Al]INST MAX <= 1.8 mg/L all year
003AFlow, in conduit or thru treatment plantINST MAX report only all year
003AFlow, in conduit or thru treatment plantINST MAX report only all year
004AFlow, in conduit or thru treatment plantINST MAX <= 0 cfs all year
005ATemperature, water deg. centigradeINST MAX report only all year
005ATemperature, water deg. centigradeINST MAX report only all year
005ASpecific conductanceINST MAX report only all year
005ASpecific conductanceINST MAX report only all year
005ApHINST MIN >= 6 SU all year
005ApHINST MIN >= 6 SU all year
005ApHINST MAX <= 9 SU all year
005ApHINST MAX <= 9 SU all year
005ASolids, total suspendedMO AVG <= 35 mg/L all year
005ASolids, total suspendedMO AVG <= 35 mg/L all year
005ASolids, total suspendedDAILY MX <= 70 mg/L all year
005ASolids, total suspendedDAILY MX <= 70 mg/L all year
005ASolids, total suspendedINST MAX <= 90 mg/L all year
005ASolids, total suspendedINST MAX <= 90 mg/L all year
005ASulfate, total [as SO4]INST MAX report only all year
005ASulfate, total [as SO4]INST MAX report only all year
005AIron, total [as Fe]MO AVG <= 2.4 mg/L all year
005AIron, total [as Fe]MO AVG <= 2.4 mg/L all year
005AIron, total [as Fe]DAILY MX <= 4.8 mg/L all year
005AIron, total [as Fe]DAILY MX <= 4.8 mg/L all year
005AIron, total [as Fe]INST MAX <= 6 mg/L all year
005AIron, total [as Fe]INST MAX <= 6 mg/L all year
005AManganese, total [as Mn]INST MAX report only all year
005AManganese, total [as Mn]INST MAX report only all year
005AAluminum, total [as Al]MO AVG <= .76 mg/L all year
005AAluminum, total [as Al]MO AVG <= .76 mg/L all year
005AAluminum, total [as Al]DAILY MX <= 1.5 mg/L all year
005AAluminum, total [as Al]DAILY MX <= 1.5 mg/L all year
005AAluminum, total [as Al]INST MAX <= 1.9 mg/L all year
005AAluminum, total [as Al]INST MAX <= 1.9 mg/L all year
005AFlow, in conduit or thru treatment plantINST MAX report only all year
005AFlow, 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