AZLE, CITY OF

NPDES permit TX0023116 · Major POTW · effective, expires 2027-10-21 · 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)
0of 38 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 (98)

OutfallParameterStatisticLimitMonths
003Oxygen, dissolved [DO]MO MIN >= 6 mg/L all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspendedDAILY AV <= 5 mg/L May, Jun, Jul, Aug, Sep
003Solids, total suspendedDAILY AV <= 12 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
003Solids, total suspendedDAILY MX <= 20 mg/L May, Jun, Jul, Aug, Sep
003Solids, total suspendedDAILY MX <= 40 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
003Solids, total suspendedDAILY AV <= 60 lb/d May, Jun, Jul, Aug, Sep
003Solids, total suspendedDAILY AV <= 144 lb/d Jan, Feb, Mar, Apr, Oct, Nov, Dec
003Nitrogen, ammonia total [as N]DAILY AV <= 1.8 mg/L May, Jun, Jul, Aug, Sep
003Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
003Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L May, Jun, Jul, Aug, Sep
003Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
003Nitrogen, ammonia total [as N]DAILY AV <= 22 lb/d May, Jun, Jul, Aug, Sep
003Nitrogen, ammonia total [as N]DAILY AV <= 36 lb/d Jan, Feb, Mar, Apr, Oct, Nov, Dec
003Phosphorus, total [as P]DAILY AV <= 1 mg/L all year
003Phosphorus, total [as P]DAILY MX <= 4 mg/L all year
003Phosphorus, total [as P]DAILY AV <= 12 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 <= 1458 gal/min all year
003Flow, in conduit or thru treatment plantANNL AVG <= 1.44 MGD 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 <= 7 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
003BOD, carbonaceous [5 day, 20 C]DAILY AV <= 5 mg/L May, Jun, Jul, Aug, Sep
003BOD, carbonaceous [5 day, 20 C]DAILY MX <= 22 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
003BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L May, Jun, Jul, Aug, Sep
003BOD, carbonaceous [5 day, 20 C]DAILY AV <= 84 lb/d Jan, Feb, Mar, Apr, Oct, Nov, Dec
003BOD, carbonaceous [5 day, 20 C]DAILY AV <= 60 lb/d May, Jun, Jul, Aug, Sep
004Oxygen, dissolved [DO]MO MIN >= 6 mg/L all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspendedDAILY AV <= 5 mg/L May, Jun, Jul, Aug, Sep
004Solids, total suspendedDAILY AV <= 12 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
004Solids, total suspendedDAILY MX <= 20 mg/L May, Jun, Jul, Aug, Sep
004Solids, total suspendedDAILY MX <= 40 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
004Solids, total suspendedDAILY AV <= 42 lb/d May, Jun, Jul, Aug, Sep
004Solids, total suspendedDAILY AV <= 101 lb/d Jan, Feb, Mar, Apr, Oct, Nov, Dec
004Nitrogen, ammonia total [as N]DAILY AV <= 1.8 mg/L May, Jun, Jul, Aug, Sep
004Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
004Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L May, Jun, Jul, Aug, Sep
004Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
004Nitrogen, ammonia total [as N]DAILY AV <= 15 lb/d May, Jun, Jul, Aug, Sep
004Nitrogen, ammonia total [as N]DAILY AV <= 25 lb/d Jan, Feb, Mar, Apr, Oct, Nov, Dec
004Phosphorus, total [as P]DAILY AV <= 1 mg/L all year
004Phosphorus, total [as P]DAILY MX <= 4 mg/L all year
004Phosphorus, total [as P]DAILY AV <= 8.4 lb/d all year
004Flow, in conduit or thru treatment plantDAILY AV report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plant2P <= 4237 gal/min all year
004Flow, in conduit or thru treatment plantANNL AVG <= 1.01 MGD all year
004E. coliDAILY AV <= 126 CFU/100mL all year
004E. coliDAILY MX <= 399 CFU/100mL all year
004BOD, carbonaceous [5 day, 20 C]DAILY AV <= 7 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
004BOD, carbonaceous [5 day, 20 C]DAILY AV <= 5 mg/L May, Jun, Jul, Aug, Sep
004BOD, carbonaceous [5 day, 20 C]DAILY MX <= 22 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
004BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L May, Jun, Jul, Aug, Sep
004BOD, carbonaceous [5 day, 20 C]DAILY AV <= 59 lb/d Jan, Feb, Mar, Apr, Oct, Nov, Dec
004BOD, carbonaceous [5 day, 20 C]DAILY AV <= 42 lb/d May, Jun, Jul, Aug, Sep
101Flow, in conduit or thru treatment plantANNL AVG <= 2.45 MGD all year
101Flow, in conduit or thru treatment plant2P <= 5695 gal/min all year
TX3Whole effluent toxicity - retest #17 DA MIN report only all year
TX3Whole effluent toxicity - retest #17 DA MIN report only all year
TX3Whole effluent toxicity - retest #1MO AV MN report only all year
TX3Whole effluent toxicity - retest #1MO AV MN report only all year
TX3Whole effluent toxicity - retest #27 DA MIN report only all year
TX3Whole effluent toxicity - retest #27 DA MIN report only all year
TX3Whole effluent toxicity - retest #2MO AV MN report only all year
TX3Whole effluent toxicity - retest #2MO AV MN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas7 DA MIN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelasMO AV MN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX3LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX3LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic 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