DORCHESTER OPERATING COMPANY LLC

NPDES permit TX0140153 · Minor NON-POTW · effective, expires 2029-03-21 · 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)
48of 78 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 (78)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Oil & GreaseDAILY AV <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Chloride [as Cl]DAILY MX <= 500 mg/L all year
001TributyltinDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY AV <= .15834 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= .21 MGD all year
001Solids, total dissolvedDAILY MX <= 3000 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Oil & GreaseDAILY AV <= 10 mg/L all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Chloride [as Cl]DAILY MX <= 500 mg/L all year
002TributyltinDAILY MX report only all year
002Flow, in conduit or thru treatment plantDAILY AV <= .13119 MGD all year
002Flow, in conduit or thru treatment plantDAILY MX <= .378 MGD all year
002Solids, total dissolvedDAILY MX <= 3000 mg/L all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Oil & GreaseDAILY AV <= 10 mg/L all year
003Oil & GreaseDAILY MX <= 15 mg/L all year
003Chloride [as Cl]DAILY MX <= 500 mg/L all year
003TributyltinDAILY MX report only all year
003Flow, in conduit or thru treatment plantDAILY AV <= .013508 MGD all year
003Flow, in conduit or thru treatment plantDAILY MX <= .063 MGD all year
003Solids, total dissolvedDAILY MX <= 3000 mg/L all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Oil & GreaseDAILY AV <= 10 mg/L all year
004Oil & GreaseDAILY MX <= 15 mg/L all year
004Chloride [as Cl]DAILY MX <= 500 mg/L all year
004TributyltinDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY AV <= .022512 MGD all year
004Flow, in conduit or thru treatment plantDAILY MX <= .126 MGD all year
004Solids, total dissolvedDAILY MX <= 3000 mg/L all year
005pHMINIMUM >= 6 SU all year
005pHMAXIMUM <= 9 SU all year
005Oil & GreaseDAILY AV <= 10 mg/L all year
005Oil & GreaseDAILY MX <= 15 mg/L all year
005Chloride [as Cl]DAILY MX <= 500 mg/L all year
005TributyltinDAILY MX report only all year
005Flow, in conduit or thru treatment plantDAILY AV <= .147 MGD all year
005Flow, in conduit or thru treatment plantDAILY MX <= .659 MGD all year
005Solids, total dissolvedDAILY MX <= 3000 mg/L all year
006pHMINIMUM >= 6 SU all year
006pHMAXIMUM <= 9 SU all year
006Oil & GreaseDAILY AV <= 10 mg/L all year
006Oil & GreaseDAILY MX <= 15 mg/L all year
006Chloride [as Cl]DAILY MX <= 500 mg/L all year
006TributyltinDAILY MX report only all year
006Flow, in conduit or thru treatment plantDAILY AV <= .022512 MGD all year
006Flow, in conduit or thru treatment plantDAILY MX <= .084 MGD all year
006Solids, total dissolvedDAILY MX <= 3000 mg/L 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
TXBWhole effluent toxicity - retest #1SINGSAMP report only all year
TXBWhole effluent toxicity - retest #2SINGSAMP report only all year
TXBLC50 Pass/Fail Static 24Hr Acute D. PulexSINGSAMP report only all year
TXBLC50 Pass/Fail Static 24Hr Acute Pimephales promelasSINGSAMP report only all year
TXCWhole effluent toxicity - retest #1SINGSAMP report only all year
TXCWhole effluent toxicity - retest #2SINGSAMP report only all year
TXCLC50 Pass/Fail Static 24Hr Acute D. PulexSINGSAMP report only all year
TXCLC50 Pass/Fail Static 24Hr Acute Pimephales promelasSINGSAMP report only all year
TXDWhole effluent toxicity - retest #1SINGSAMP report only all year
TXDWhole effluent toxicity - retest #2SINGSAMP report only all year
TXDLC50 Pass/Fail Static 24Hr Acute D. PulexSINGSAMP report only all year
TXDLC50 Pass/Fail Static 24Hr Acute Pimephales promelasSINGSAMP report only all year
TXEWhole effluent toxicity - retest #1SINGSAMP report only all year
TXEWhole effluent toxicity - retest #2SINGSAMP report only all year
TXELC50 Pass/Fail Static 24Hr Acute D. PulexSINGSAMP report only all year
TXELC50 Pass/Fail Static 24Hr Acute Pimephales promelasSINGSAMP report only all year
TXFWhole effluent toxicity - retest #1SINGSAMP report only all year
TXFWhole effluent toxicity - retest #2SINGSAMP report only all year
TXFLC50 Pass/Fail Static 24Hr Acute D. PulexSINGSAMP report only all year
TXFLC50 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