SAN BENITO, CITY OF

NPDES permit TX0135470 · Major POTW · effective, expires 2031-02-23 · 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

2values over a limit
0required values missing, on 0 form(s)
0of 40 forms filed late

Last period with anything received: 2026-08-31. Most often over: E. coli (2).

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 (50)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO MIN >= 4 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedDAILY AV <= 15 mg/L all year
001Solids, total suspendedDAILY MX <= 40 mg/L all year
001Solids, total suspendedDAILY AV <= 469 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L all year
001Nitrogen, ammonia total [as N]DAILY AV <= 94 lb/d all year
001Flow, in conduit or thru treatment plantDAILY AV report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plant2P <= 7813 gal/min all year
001Flow, in conduit or thru treatment plantANNL AVG <= 3.75 MGD all year
001E. coliDAILY AV <= 126 CFU/100mL all year
001E. coliDAILY MX <= 399 CFU/100mL all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 10 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 313 lb/d all year
002Oxygen, dissolved [DO]MO MIN >= 4 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY AV <= 15 mg/L all year
002Solids, total suspendedSINGGRAB <= 60 mg/L all year
002Solids, total suspendedDAILY AV <= 18 lb/d all year
002Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L all year
002Nitrogen, ammonia total [as N]SINGGRAB <= 15 mg/L all year
002Nitrogen, ammonia total [as N]DAILY AV <= 3.6 lb/d 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
002Flow, in conduit or thru treatment plantANNL AVG <= .144 MGD all year
002E. coliDAILY AV <= 126 CFU/100mL all year
002E. coliSINGGRAB <= 399 CFU/100mL all year
002BOD, carbonaceous [5 day, 20 C]DAILY AV <= 10 mg/L all year
002BOD, carbonaceous [5 day, 20 C]SINGGRAB <= 35 mg/L all year
002BOD, carbonaceous [5 day, 20 C]DAILY AV <= 12 lb/d all year
101Flow, in conduit or thru treatment plantANNL AVG <= 3.75 MGD all year
TX1Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
TX1Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexMO AV MN report only all year
TX1LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX1LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasMO AV MN report only all year
TX1NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48HR MIN report only all year
TX1NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexMO AV MN report only all year
TX1NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48HR MIN report only all year
TX1NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasMO AV MN report only all year
TX1LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex48HR MIN report only all year
TX1LOAEC Lethal Static Renewal 48HR Acute Daphnia pulexMO AV MN report only all year
TX1LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX1LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelasMO AV MN 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