TYLER, CITY OF

NPDES permit TX0047988 · Major POTW · effective, expired 2026-09-17 · EPA's file as of 2026-09-26

Keep this permit as a site — opens New site at EPA's facility point (32.256111, -95.321111); you set the radius.

These are the last limits EPA's file holds for this permit, from an earlier version of it (version 0 in EPA's file): its current version carries none yet. Read your permit: a renewal can change them.

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

Last period with anything received: 2026-08-31. Most often over: Solids, total suspended (23), Nitrogen, ammonia total [as N] (21), BOD, carbonaceous [5 day, 20 C] (4).

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).

• Outfall 001, form A (DOMESTIC FACILITY - 001): every 1 month(s), 26 values
• Outfall TX1, form S (7-DAY CHRONIC FRESHWATER - 001): files for periods ending in Jun, Dec
• Outfall TX1, form Y (7-DAY CHRONIC FRESHWATER - 001): files for periods ending in Dec
• Outfall TXA, form S (24-HOUR ACUTE FRESHWATER - 001): files for periods ending in Jun, Dec

How strict are these limits?

Each concentration limit against the same limit in comparable permits. Where it appears more than once, its strictest value.

• Nitrogen, ammonia total [as N], daily maximum 7 mg/L — stricter than 84% of 470 other major POTWs in Texas; 14% have the same limit
• Oxygen, dissolved [DO], monthly minimum at least 5 mg/L — stricter than 44% of 537 other major POTWs in Texas; 14% have the same limit
• Solids, total suspended, daily average 15 mg/L — stricter than 9% of 536 other major POTWs in Texas; 76% have the same limit
• Solids, total suspended, daily maximum 40 mg/L — stricter than 8% of 521 other major POTWs in Texas; 85% have the same limit
• Oxygen, dissolved [DO], minimum at least 4 mg/L — stricter than 6% of 495 other major POTWs nationwide; 5% have the same limit
• Nitrogen, ammonia total [as N], daily average 3 mg/L — stricter than 3% of 482 other major POTWs in Texas; 39% have the same limit
• BOD, carbonaceous [5 day, 20 C], daily average 10 mg/L — stricter than 2% of 482 other major POTWs in Texas; 63% have the same limit
• BOD, carbonaceous [5 day, 20 C], daily maximum 25 mg/L — stricter than 2% of 472 other major POTWs in Texas; 64% have the same limit
• E. coli, daily maximum 399 CFU/100mL — stricter than 0% of 380 other major POTWs in Texas; 73% have the same limit
• E. coli, daily average 126 CFU/100mL — stricter than 0% of 390 other major POTWs in Texas; 74% have the same limit
• pH, minimum at least 6 SU — stricter than 0% of 542 other major POTWs in Texas; 94% have the same limit
• Chlorine, total residual, instantaneous maximum .1 mg/L — stricter than 0% of 334 other major POTWs in Texas; 99% have the same limit
• pH, maximum 9 SU — stricter than 0% of 542 other major POTWs in Texas; 100% have the same limit
• Chlorine, total residual, monthly minimum at least 1 mg/L — stricter than 0% of 389 other major POTWs in Texas; 100% have the same limit

Limits in force (60)

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