FLINT HILLS RESOURCES CORPUS CHRISTI, LLC

NPDES permit TX0006599 · Major NON-POTW · effective, expires 2026-12-20 · 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
0required values missing, on 0 form(s)
1of 85 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (83)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY AV <= 100 deg F all year
001Temperature, water deg. fahrenheitDAILY MX <= 105 deg F all year
001BOD, 5-day, 20 deg. CDAILY AV <= 292 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 584 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY AV <= 2189 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 4379 lb/d all year
001pHMINIMUM >= 5 SU all year
001pHMAXIMUM <= 11 SU all year
001Solids, total suspendedDAILY AV <= 292 lb/d all year
001Solids, total suspendedDAILY MX <= 584 lb/d all year
001Oil & GreaseDAILY AV <= 114 lb/d all year
001Oil & GreaseDAILY MX <= 214 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 146 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 248 lb/d all year
001Sulfide, total [as S]DAILY AV <= 1.9 lb/d all year
001Sulfide, total [as S]DAILY MX <= 4.4 lb/d all year
001Chromium, hexavalent [as Cr]DAILY AV <= .243 lb/d all year
001Chromium, hexavalent [as Cr]DAILY MX <= .513 lb/d all year
001Chromium, total [as Cr]DAILY AV <= 2.7 lb/d all year
001Chromium, total [as Cr]DAILY MX <= 6.7 lb/d all year
001Flow, in conduit or thru treatment plantDAILY AV <= 2.16 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= 3.6 MGD all year
001Phenolic compounds, totalDAILY AV <= 1.1 lb/d all year
001Phenolic compounds, totalDAILY MX <= 2.7 lb/d all year
001pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
001pH range excursions, monthly total accumMO TOTAL <= 446 min all year
003Oxygen demand, chem. [high level] [COD]DAILY MX <= 150 mg/L all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Oil & GreaseDAILY MX <= 15 mg/L all year
003Zinc, total [as Zn]DAILY MX report only all year
003Flow, in conduit or thru treatment plantDAILY AV report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
004Oxygen demand, chem. [high level] [COD]DAILY MX <= 150 mg/L all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Oil & GreaseDAILY MX <= 15 mg/L all year
004Flow, in conduit or thru treatment plantDAILY AV report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
006Oxygen demand, chem. [high level] [COD]DAILY MX <= 150 mg/L all year
006pHMINIMUM >= 6 SU all year
006pHMAXIMUM <= 9 SU all year
006Oil & GreaseDAILY MX <= 15 mg/L all year
006Flow, in conduit or thru treatment plantDAILY AV report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
007Oxygen demand, chem. [high level] [COD]DAILY MX <= 150 mg/L all year
007pHMINIMUM >= 6 SU all year
007pHMAXIMUM <= 9 SU all year
007Oil & GreaseDAILY MX <= 15 mg/L all year
007Flow, in conduit or thru treatment plantDAILY AV report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
009Oxygen demand, chem. [high level] [COD]DAILY MX <= 150 mg/L all year
009pHMINIMUM >= 6 SU all year
009pHMAXIMUM <= 9 SU all year
009Oil & GreaseDAILY MX <= 15 mg/L all year
009Flow, in conduit or thru treatment plantDAILY AV report only all year
009Flow, in conduit or thru treatment plantDAILY MX report only all year
011Oxygen demand, chem. [high level] [COD]DAILY MX <= 150 mg/L all year
011pHMINIMUM >= 6 SU all year
011pHMAXIMUM <= 9 SU all year
011Oil & GreaseDAILY MX <= 15 mg/L all year
011Flow, in conduit or thru treatment plantDAILY AV report only all year
011Flow, in conduit or thru treatment plantDAILY MX report only all year
TX2Whole effluent toxicity - retest #148HR MIN report only all year
TX2Whole effluent toxicity - retest #1MO AV MN report only all year
TX2Whole effluent toxicity - retest #248HR MIN report only all year
TX2Whole effluent toxicity - retest #2MO AV MN report only all year
TX2LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)48HR MIN report only all year
TX2LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)MO AV MN report only all year
TX2Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia menidia48HR MIN report only all year
TX2Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia menidiaMO AV MN report only all year
TX2NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)48HR MIN report only all year
TX2NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX2NOAEC Lethal Static Renewal 48HR Acute Menidia menidia48HR MIN report only all year
TX2NOAEC Lethal Static Renewal 48HR Acute Menidia menidiaMO AV MN report only all year
TX2LOAEC Lethal Survival Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)48HR MIN report only all year
TX2LOAEC Lethal Survival Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX2LOAEC Survival Static Renewal 48HR Acute Menidia menidia48HR MIN report only all year
TX2LOAEC Survival Static Renewal 48HR Acute Menidia menidiaMO AV MN report only all year
TXAWhole effluent toxicity - retest #1SINGSAMP report only all year
TXAWhole effluent toxicity - retest #2SINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)SINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Menidia menidiaSINGSAMP 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