ZAPATA COUNTY

NPDES permit TX0070211 · Major POTW · administratively continued, expires 2026-08-19 · 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.

This permit expired on 2026-08-19 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

14values over a limit
0required values missing, on 0 form(s)
0of 12 forms filed late

Last period with anything received: 2026-08-31. Most often over: Nitrogen, ammonia total [as N] (8), BOD, carbonaceous [5 day, 20 C] (5), E. coli (1).

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 (30)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO MIN >= 6 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 <= 100 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 2 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L all year
001Nitrogen, ammonia total [as N]DAILY AV <= 13 lb/d all year
001Nitrate nitrogen, dry weightDAILY AV <= 27.3 mg/L all year
001Nitrate nitrogen, dry weightDAILY MX <= 58 mg/L all year
001Nitrate nitrogen, dry weightDAILY AV <= 182 lb/d all year
001Phosphorus, total [as P]DAILY AV report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]DAILY AV report only all year
001Sulfate, total [as SO4]DAILY AV report only all year
001Sulfate, total [as SO4]DAILY MX report only all year
001Sulfate, total [as SO4]DAILY AV report only all year
001Flow, in conduit or thru treatment plantDAILY AV <= .8 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMO MIN >= 1 mg/L all year
001Chlorine, total residualMO MAX <= 4 mg/L all year
001E. coliDAILY AV <= 126 CFU/100mL all year
001E. coliDAILY MX <= 399 CFU/100mL all year
001Solids, total dissolvedDAILY AV report only all year
001Solids, total dissolvedDAILY MX report only all year
001Solids, total dissolvedDAILY AV report only all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 5 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 33 lb/d 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