HORIZON REGIONAL MUD

NPDES permit TX0086045 · Major POTW · effective, expires 2029-05-24 · 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)
0of 17 forms filed late

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

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among TX permits in EPA's filings — check your permit).

Limits in force (38)

OutfallParameterStatisticLimitMonths
003Oxygen, dissolved [DO]MO MIN >= 4 mg/L all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspendedDAILY AV <= 15 mg/L all year
003Solids, total suspendedDAILY MX <= 40 mg/L all year
003Solids, total suspendedDAILY AV <= 375 lb/d all year
003Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L all year
003Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L all year
003Nitrogen, ammonia total [as N]DAILY AV <= 75 lb/d 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
003Flow, in conduit or thru treatment plant2P <= 5208 gal/min all year
003Flow, in conduit or thru treatment plantANNL AVG <= 3 MGD all year
003Chlorine, total residualMO MIN >= 1 mg/L all year
003Chlorine, total residualMO MAX <= 4 mg/L all year
003E. coliDAILY AV <= 126 CFU/100mL all year
003E. coliDAILY MX <= 399 CFU/100mL all year
003BOD, carbonaceous [5 day, 20 C]DAILY AV <= 10 mg/L all year
003BOD, carbonaceous [5 day, 20 C]DAILY MX <= 25 mg/L all year
003BOD, carbonaceous [5 day, 20 C]DAILY AV <= 250 lb/d all year
TX3Whole effluent toxicity - retest #148HR MIN report only all year
TX3Whole effluent toxicity - retest #1MO AV MN report only all year
TX3Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
TX3Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexMO AV MN report only all year
TX3LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX3LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasMO AV MN report only all year
TX3NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48HR MIN report only all year
TX3NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexMO AV MN report only all year
TX3NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48HR MIN report only all year
TX3NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasMO AV MN report only all year
TX3LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex48HR MIN report only all year
TX3LOAEC Lethal Static Renewal 48HR Acute Daphnia pulexMO AV MN report only all year
TX3LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX3LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelasMO AV MN 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

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