NORTH TEXAS MUNICIPAL WATER DISTRICT

NPDES permit TX0138584 · Major POTW · effective, expires 2031-03-02 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
76required values missing, on 4 form(s)
1of 5 forms filed late

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

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).

Limits in force (44)

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 <= 5 mg/L all year
001Solids, total suspendedDAILY MX <= 20 mg/L all year
001Solids, total suspendedDAILY AV <= 667 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 1.3 mg/L Apr, May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 6 mg/L Apr, May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY AV <= 173 lb/d Apr, May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY AV <= 400 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001Phosphorus, total [as P]DAILY AV report only all year
001Phosphorus, total [as P]DAILY AV report only 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 <= 44444 gal/min all year
001Flow, in conduit or thru treatment plantANNL AVG <= 16 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 <= 5 mg/L Apr, May, Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 10 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L Apr, May, Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 25 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 667 lb/d Apr, May, Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 1334 lb/d Jan, Feb, Mar, Oct, Nov, Dec
TX1IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX1IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX1IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1IC25 Sub-Lethal Static Renewal 7 Day Chronic 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