OAK GROVE MANAGEMENT COMPANY L

NPDES permit TX0068021 · Major NON-POTW · effective, expires 2027-08-12 · 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)
3of 71 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 (112)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY AV <= 110 deg F all year
001Temperature, water deg. fahrenheitDAILY MX <= 115 deg F all year
001Flow, in conduit or thru treatment plantDAILY AV report only all year
001Flow, in conduit or thru treatment plantDAILY MX <= 1610 MGD all year
001Chlorine, total residualDAILY MX <= .2 mg/L all year
001Chlorine, total residualDAILY MX <= 428 lb/d all year
001Chlorine, free availableDAILY AV <= .2 mg/L all year
001Chlorine, free availableDAILY MX <= .5 mg/L all year
001Chlorine, free availableDAILY AV <= 223 lb/d all year
001Chlorine, free availableDAILY MX <= 559 lb/d all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY AV <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 50 mg/L all year
002Oil & GreaseDAILY AV <= 15 mg/L all year
002Oil & GreaseDAILY MX <= 20 mg/L all year
002Flow, in conduit or thru treatment plantDAILY AV report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
101pHMINIMUM >= 6 SU all year
101pHMAXIMUM <= 9 SU all year
101Solids, total suspendedDAILY AV <= 30 mg/L all year
101Solids, total suspendedDAILY MX <= 50 mg/L all year
101Oil & GreaseDAILY AV <= 15 mg/L all year
101Oil & GreaseDAILY MX <= 20 mg/L all year
101Nitrogen, nitrate total [as N]DAILY AV <= 3 mg/L all year
101Nitrogen, nitrate total [as N]DAILY MX <= 4 mg/L all year
101Arsenic, total [as As]DAILY AV <= .008 mg/L all year
101Arsenic, total [as As]DAILY MX <= .018 mg/L all year
101Copper, total [as Cu]DAILY AV <= .5 mg/L all year
101Copper, total [as Cu]DAILY MX <= 1 mg/L all year
101Iron, total [as Fe]DAILY AV <= 1 mg/L all year
101Iron, total [as Fe]DAILY MX <= 1 mg/L all year
101Selenium, total [as Se]DAILY AV <= .02 mg/L all year
101Selenium, total [as Se]DAILY MX <= .035 mg/L all year
101Flow, in conduit or thru treatment plantDAILY AV report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
101Mercury, total [as Hg]DAILY AV <= .000034 mg/L all year
101Mercury, total [as Hg]DAILY MX <= .000103 mg/L all year
201pHMINIMUM >= 6 SU all year
201pHMAXIMUM <= 9 SU all year
201Solids, total suspendedDAILY AV <= 30 mg/L all year
201Solids, total suspendedDAILY MX <= 50 mg/L all year
201Oil & GreaseDAILY AV <= 15 mg/L all year
201Oil & GreaseDAILY MX <= 20 mg/L all year
201Flow, in conduit or thru treatment plantDAILY AV report only all year
201Flow, in conduit or thru treatment plantDAILY MX report only all year
301BOD, 5-day, 20 deg. CDAILY AV <= 20 mg/L all year
301BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
301pHMINIMUM >= 6 SU all year
301pHMAXIMUM <= 9 SU all year
301Solids, total suspendedDAILY AV <= 20 mg/L all year
301Solids, total suspendedDAILY MX <= 45 mg/L all year
301Flow, in conduit or thru treatment plantDAILY AV <= .025 MGD all year
301Flow, in conduit or thru treatment plantDAILY MX <= .03 MGD all year
301E. coliDAILY AV <= 126 CFU/100mL all year
301E. coliDAILY MX <= 399 CFU/100mL all year
401pHMINIMUM >= 6 SU all year
401pHMAXIMUM <= 9 SU all year
401Solids, total suspendedDAILY AV <= 30 mg/L all year
401Solids, total suspendedDAILY MX <= 50 mg/L all year
401Oil & GreaseDAILY AV <= 15 mg/L all year
401Oil & GreaseDAILY MX <= 20 mg/L all year
401Nitrogen, nitrate total [as N]DAILY AV <= 3 mg/L all year
401Nitrogen, nitrate total [as N]DAILY MX <= 4 mg/L all year
401Arsenic, total [as As]DAILY AV <= .008 mg/L all year
401Arsenic, total [as As]DAILY MX <= .018 mg/L all year
401Copper, total [as Cu]DAILY AV <= .5 mg/L all year
401Copper, total [as Cu]DAILY MX <= 1 mg/L all year
401Iron, total [as Fe]DAILY AV <= 1 mg/L all year
401Iron, total [as Fe]DAILY MX <= 1 mg/L all year
401Selenium, total [as Se]DAILY AV <= .02 mg/L all year
401Selenium, total [as Se]DAILY MX <= .035 mg/L all year
401Flow, in conduit or thru treatment plantDAILY AV report only all year
401Flow, in conduit or thru treatment plantDAILY MX report only all year
401Mercury, total [as Hg]DAILY AV <= .000034 mg/L all year
401Mercury, total [as Hg]DAILY MX <= .000103 mg/L all year
TX1Whole effluent toxicity - retest #17 DA MIN report only all year
TX1Whole effluent toxicity - retest #17 DA MIN report only all year
TX1Whole effluent toxicity - retest #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN report only all year
TX1Whole effluent toxicity - retest #2MO AV MN report only all year
TX1Whole effluent toxicity - retest #2MO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelasMO AV MN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelasMO 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 D. PulexSINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Pimephales promelasSINGSAMP 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