SI GROUP, INC.

NPDES permit WV0004740 · Major NON-POTW · effective, expires 2030-05-20 · 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

3values over a limit
0required values missing, on 0 form(s)
0of 40 forms filed late

Last period with anything received: 2026-07-31. Most often over: Iron, total [as Fe] (2), Aluminum, total recoverable (1).

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among WV permits in EPA's filings — check your permit).

Limits in force (218)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only Oct
001Temperature, water deg. fahrenheitMO AVG report only May
001Temperature, water deg. fahrenheitMO AVG report only Nov
001Temperature, water deg. fahrenheitMO AVG report only Aug
001Temperature, water deg. fahrenheitMO AVG report only Jan
001Temperature, water deg. fahrenheitMO AVG report only Mar
001Temperature, water deg. fahrenheitMO AVG report only Feb
001Temperature, water deg. fahrenheitMO AVG report only Dec
001Temperature, water deg. fahrenheitMO AVG report only Jun
001Temperature, water deg. fahrenheitMO AVG report only Apr
001Temperature, water deg. fahrenheitMO AVG report only Jul
001Temperature, water deg. fahrenheitMO AVG report only Sep
001Temperature, water deg. fahrenheitDAILY MX report only Oct
001Temperature, water deg. fahrenheitDAILY MX report only May
001Temperature, water deg. fahrenheitDAILY MX report only Nov
001Temperature, water deg. fahrenheitDAILY MX <= 107.8 deg F Aug
001Temperature, water deg. fahrenheitDAILY MX report only Jan
001Temperature, water deg. fahrenheitDAILY MX report only Mar
001Temperature, water deg. fahrenheitDAILY MX report only Feb
001Temperature, water deg. fahrenheitDAILY MX report only Dec
001Temperature, water deg. fahrenheitDAILY MX report only Jun
001Temperature, water deg. fahrenheitDAILY MX report only Apr
001Temperature, water deg. fahrenheitDAILY MX <= 104.1 deg F Jul
001Temperature, water deg. fahrenheitDAILY MX report only Sep
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Temp. diff. between samp. & upstrm deg. FMO AVG report only all year
001Temp. diff. between samp. & upstrm deg. FDAILY MX <= 22 deg F all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Oil and grease, hexane extr methodMO AVG <= 9 mg/L all year
001Oil and grease, hexane extr methodDAILY MX <= 14 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Carbon, tot organic [TOC]MO AVG report only all year
001Carbon, tot organic [TOC]DAILY MX report only all year
001Chloride [as Cl]MO AVG report only all year
001Chloride [as Cl]DAILY MX report only all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Iron, total recoverableMO AVG report only all year
001Iron, total recoverableDAILY MX report only all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableDAILY MX report only all year
001Aluminum, total recoverableMO AVG report only all year
001Aluminum, total recoverableDAILY MX report only all year
0011,2-DichloroethaneMO AVG report only all year
0011,2-DichloroethaneDAILY MX report only all year
001ChloroformMO AVG report only all year
001ChloroformDAILY MX report only all year
001ChloroformMO AVG report only all year
001ChloroformDAILY MX report only all year
001Phenolics, total recoverableMO AVG report only all year
001Phenolics, total recoverableDAILY MX report only all year
001Methyl chloride [Chloromethane]MO AVG report only all year
001Methyl chloride [Chloromethane]DAILY MX report only all year
001Methyl chloride [Chloromethane]MO AVG report only all year
001Methyl chloride [Chloromethane]DAILY MX report only all year
0011,2-DichloropropaneMO AVG report only all year
0011,2-DichloropropaneDAILY MX report only all year
0011,2-DichloropropaneMO AVG report only all year
0011,2-DichloropropaneDAILY MX report only all year
0012,4,6-TrichlorophenolMO AVG report only all year
0012,4,6-TrichlorophenolDAILY MX report only all year
0012,4,6-TrichlorophenolMO AVG report only all year
0012,4,6-TrichlorophenolDAILY 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
001Perfluorooctanoic acid (PFOA)MO AVG report only all year
001Perfluorooctanoic acid (PFOA)DAILY MX report only all year
001Perfluorooctanoic acid (PFOA)MO AVG report only all year
001Perfluorooctanoic acid (PFOA)DAILY MX report only all year
001Perfluorobutanoic acid (PFBA)MO AVG report only all year
001Perfluorobutanoic acid (PFBA)DAILY MX report only all year
001Perfluorobutanoic acid (PFBA)MO AVG report only all year
001Perfluorobutanoic acid (PFBA)DAILY MX report only all year
001Perfluoropentanoic acid (PFPeA)MO AVG report only all year
001Perfluoropentanoic acid (PFPeA)DAILY MX report only all year
001Perfluoropentanoic acid (PFPeA)MO AVG report only all year
001Perfluoropentanoic acid (PFPeA)DAILY MX report only all year
001Perfluorohexanoic acid (PFHxA)MO AVG report only all year
001Perfluorohexanoic acid (PFHxA)DAILY MX report only all year
001Perfluorohexanoic acid (PFHxA)MO AVG report only all year
001Perfluorohexanoic acid (PFHxA)DAILY MX report only all year
001Perfluoroheptanoic acid (PFHpA)MO AVG report only all year
001Perfluoroheptanoic acid (PFHpA)DAILY MX report only all year
001Perfluoroheptanoic acid (PFHpA)MO AVG report only all year
001Perfluoroheptanoic acid (PFHpA)DAILY MX report only all year
001Perfluorononanoic acid (PFNA)MO AVG report only all year
001Perfluorononanoic acid (PFNA)DAILY MX report only all year
001Perfluorononanoic acid (PFNA)MO AVG report only all year
001Perfluorononanoic acid (PFNA)DAILY MX report only all year
001Perfluorodecanoic acid (PFDA)MO AVG report only all year
001Perfluorodecanoic acid (PFDA)DAILY MX report only all year
001Perfluorodecanoic acid (PFDA)MO AVG report only all year
001Perfluorodecanoic acid (PFDA)DAILY MX report only all year
001Perfluorododecanoic acid (PFDoA)MO AVG report only all year
001Perfluorododecanoic acid (PFDoA)DAILY MX report only all year
001Perfluorododecanoic acid (PFDoA)MO AVG report only all year
001Perfluorododecanoic acid (PFDoA)DAILY MX report only all year
001Perfluorobutanesulfonic acid (PFBS)MO AVG report only all year
001Perfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
001Perfluorobutanesulfonic acid (PFBS)MO AVG report only all year
001Perfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
001Perfluoroheptanesulfonic acid (PFHpS)MO AVG report only all year
001Perfluoroheptanesulfonic acid (PFHpS)DAILY MX report only all year
001Perfluoroheptanesulfonic acid (PFHpS)MO AVG report only all year
001Perfluoroheptanesulfonic acid (PFHpS)DAILY MX report only all year
001Perfluorohexanesulfonic acid (PFHxS)MO AVG report only all year
001Perfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
001Perfluorohexanesulfonic acid (PFHxS)MO AVG report only all year
001Perfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
001Perfluorooctanesulfonic acid (PFOS)MO AVG report only all year
001Perfluorooctanesulfonic acid (PFOS)DAILY MX report only all year
001Perfluorooctanesulfonic acid (PFOS)MO AVG report only all year
001Perfluorooctanesulfonic acid (PFOS)DAILY MX report only all year
0011H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)MO AVG report only all year
0011H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)DAILY MX report only all year
0011H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)MO AVG report only all year
0011H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)DAILY MX report only all year
001Perfluoropentanesulfonic acid (PFPeS)MO AVG report only all year
001Perfluoropentanesulfonic acid (PFPeS)DAILY MX report only all year
001Perfluoropentanesulfonic acid (PFPeS)MO AVG report only all year
001Perfluoropentanesulfonic acid (PFPeS)DAILY MX report only all year
001Hexafluoropropylene oxide dimer acid (HFPO-DA)MO AVG report only all year
001Hexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
001Hexafluoropropylene oxide dimer acid (HFPO-DA)MO AVG report only all year
001Hexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
001Toxicity [acute], Ceriodaphnia dubiaMO AVG <= .64 tox acute all year
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX <= 1.28 tox acute all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MO AVG <= .64 tox acute all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX <= 1.28 tox acute all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Chemical Oxygen Demand [COD]MO AVG report only all year
001Chemical Oxygen Demand [COD]DAILY MX report only all year
001ChloroethaneMO AVG report only all year
001ChloroethaneDAILY MX report only all year
001ChloroethaneMO AVG report only all year
001ChloroethaneDAILY MX report only all year
002BOD, 5-day, 20 deg. CMO AVG report only all year
002BOD, 5-day, 20 deg. CDAILY MX report only all year
002Oxygen demand, chem. [high level] [COD]MO AVG report only all year
002Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
002pHINST MIN report only all year
002pHINST MAX report only all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Oil and grease, hexane extr methodMO AVG report only all year
002Oil and grease, hexane extr methodDAILY MX report only all year
002Iron, total [as Fe]MO AVG report only all year
002Iron, total [as Fe]DAILY MX <= 1.5 mg/L all year
002Aluminum, total recoverableMO AVG report only all year
002Aluminum, total recoverableDAILY MX <= 1.8 mg/L 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
101BOD, 5-day, 20 deg. CMO AVG report only all year
101BOD, 5-day, 20 deg. CDAILY MX report only all year
101BOD, 5-day, 20 deg. CMO AVG <= 38 lb/d all year
101BOD, 5-day, 20 deg. CDAILY MX <= 102 lb/d all year
101Solids, total suspendedMO AVG report only all year
101Solids, total suspendedDAILY MX report only all year
101Solids, total suspendedMO AVG <= 49 lb/d all year
101Solids, total suspendedDAILY MX <= 158 lb/d all year
1011,2-DichloroethaneMO AVG report only all year
1011,2-DichloroethaneDAILY MX report only all year
1011,2-DichloroethaneMO AVG <= .06 lb/d all year
1011,2-DichloroethaneDAILY MX <= .186 lb/d all year
101ChloroformMO AVG report only all year
101ChloroformDAILY MX report only all year
101ChloroformMO AVG <= .019 lb/d all year
101ChloroformDAILY MX <= .041 lb/d all year
101TolueneMO AVG report only all year
101TolueneDAILY MX report only all year
101TolueneMO AVG <= .023 lb/d all year
101TolueneDAILY MX <= .07 lb/d all year
101ChryseneMO AVG report only all year
101ChryseneDAILY MX report only all year
101ChryseneMO AVG <= .019 lb/d all year
101ChryseneDAILY MX <= .052 lb/d all year
101PyreneMO AVG report only all year
101PyreneDAILY MX report only all year
101PyreneMO AVG <= .022 lb/d all year
101PyreneDAILY MX <= .059 lb/d all year
1011,2-DichloropropaneMO AVG report only all year
1011,2-DichloropropaneDAILY MX report only all year
1011,2-DichloropropaneMO AVG <= .135 lb/d all year
1011,2-DichloropropaneDAILY MX <= .203 lb/d all year
1012,4-DichlorophenolMO AVG report only all year
1012,4-DichlorophenolDAILY MX report only all year
1012,4-DichlorophenolMO AVG <= .034 lb/d all year
1012,4-DichlorophenolDAILY MX <= .099 lb/d all year
101PhenolMO AVG report only all year
101PhenolDAILY MX report only all year
101PhenolMO AVG <= .013 lb/d all year
101PhenolDAILY MX <= .023 lb/d all year
101Di[2-ethylhexyl] phthalate [DEHP]MO AVG report only all year
101Di[2-ethylhexyl] phthalate [DEHP]DAILY MX report only all year
101Di[2-ethylhexyl] phthalate [DEHP]MO AVG <= .091 lb/d all year
101Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .246 lb/d all year
101HexachlorobenzeneMO AVG report only all year
101HexachlorobenzeneDAILY MX report only all year
101HexachlorobenzeneMO AVG <= .013 lb/d all year
101HexachlorobenzeneDAILY MX <= .025 lb/d all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
1013,4-BenzofluorantheneMO AVG report only all year
1013,4-BenzofluorantheneDAILY MX report only all year
1013,4-BenzofluorantheneMO AVG <= .02 lb/d all year
1013,4-BenzofluorantheneDAILY MX <= .054 lb/d all year
101ChloroethaneMO AVG report only all year
101ChloroethaneDAILY MX report only all year
101ChloroethaneMO AVG <= .092 lb/d all year
101ChloroethaneDAILY MX <= .236 lb/d 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