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Mallard Point WWTP LLC

Sewerage Systems, Greenville, Texas. NPDES permit TX0123528, in force until Apr 24, 2030. Last 12 months: over a limit 55 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (19 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
55 values over a limit, 39 required values missing, 1 of 14 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 55 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], daily maximum13.3 mg/L≤ 5 mg/L166%
October 2025Solids, total suspended, daily average19.67 mg/L≤ 5 mg/L293%
November 2025BOD, carbonaceous [5 day, 20 C], daily maximum11.04 mg/L≤ 5 mg/L121%
November 2025Solids, total suspended, daily average18.9 mg/L≤ 5 mg/L278%
December 2025BOD, carbonaceous [5 day, 20 C], daily maximum9.16 mg/L≤ 5 mg/L83%
December 2025Solids, total suspended, daily average19.78 mg/L≤ 5 mg/L296%
December 2025Solids, total suspended, daily average8.5 lb/d≤ 4.4 lb/d93%
January 2026BOD, carbonaceous [5 day, 20 C], daily maximum20 mg/L≤ 5 mg/L300%
January 2026Solids, total suspended, daily average71 mg/L≤ 5 mg/L1320%
January 2026Solids, total suspended, single grab sample136 mg/L≤ 30 mg/L353%
February 2026BOD, carbonaceous [5 day, 20 C], daily maximum12.3 mg/L≤ 5 mg/L146%
February 2026Solids, total suspended, daily average170.7 mg/L≤ 5 mg/L3314%
February 2026Solids, total suspended, daily average7.39 lb/d≤ 4.4 lb/d68%
February 2026Solids, total suspended, single grab sample228 mg/L≤ 30 mg/L660%
March 2026BOD, carbonaceous [5 day, 20 C], daily maximum31.4 mg/L≤ 5 mg/L528%
March 2026BOD, carbonaceous [5 day, 20 C], single grab sample81.9 mg/L≤ 30 mg/L173%
March 2026E. coli, daily average2416 CFU/100mL≤ 126 CFU/100mL1817%
March 2026E. coli, single grab sample2416 CFU/100mL≤ 399 CFU/100mL506%
March 2026Nitrogen, ammonia total [as N], daily average3.99 mg/L≤ 2 mg/L100%
March 2026Solids, total suspended, daily average159.7 mg/L≤ 5 mg/L3094%
March 2026Solids, total suspended, daily average6.92 lb/d≤ 4.4 lb/d57%
March 2026Solids, total suspended, single grab sample316 mg/L≤ 30 mg/L953%
April 2026BOD, carbonaceous [5 day, 20 C], daily maximum128 mg/L≤ 5 mg/L2460%
April 2026BOD, carbonaceous [5 day, 20 C], single grab sample128 mg/L≤ 30 mg/L327%
April 2026Nitrogen, ammonia total [as N], daily average4.37 mg/L≤ 2 mg/L119%
April 2026Solids, total suspended, daily average33.07 lb/d≤ 4.4 lb/d652%
April 2026Solids, total suspended, daily average763 mg/L≤ 5 mg/L15160%
April 2026Solids, total suspended, single grab sample1300 mg/L≤ 30 mg/L4233%
May 2026BOD, carbonaceous [5 day, 20 C], daily average426 lb/d≤ 4.4 lb/d9582%
May 2026BOD, carbonaceous [5 day, 20 C], daily maximum12.56 mg/L≤ 5 mg/L151%
May 2026Nitrogen, ammonia total [as N], daily average12.56 mg/L≤ 2 mg/L528%
May 2026Nitrogen, ammonia total [as N], daily average426 lb/d≤ 1.8 lb/d23567%
May 2026Nitrogen, ammonia total [as N], single grab sample24.6 mg/L≤ 15 mg/L64%
May 2026Solids, total suspended, daily average76.3 lb/d≤ 4.4 lb/d1634%
May 2026Solids, total suspended, daily average889 mg/L≤ 5 mg/L17680%
May 2026Solids, total suspended, single grab sample1890 mg/L≤ 30 mg/L6200%
June 2026BOD, carbonaceous [5 day, 20 C], daily average9.86 lb/d≤ 4.4 lb/d124%
June 2026BOD, carbonaceous [5 day, 20 C], daily maximum27.54 mg/L≤ 5 mg/L451%
June 2026BOD, carbonaceous [5 day, 20 C], single grab sample39.6 mg/L≤ 30 mg/L32%
June 2026Nitrogen, ammonia total [as N], daily average12.1 mg/L≤ 2 mg/L505%
June 2026Nitrogen, ammonia total [as N], daily average4.37 lb/d≤ 1.8 lb/d143%
June 2026Nitrogen, ammonia total [as N], single grab sample19.17 mg/L≤ 15 mg/L28%
June 2026Solids, total suspended, daily average107 lb/d≤ 4.4 lb/d2332%
June 2026Solids, total suspended, daily average297 mg/L≤ 5 mg/L5840%
June 2026Solids, total suspended, single grab sample810 mg/L≤ 30 mg/L2600%
July 2026BOD, carbonaceous [5 day, 20 C], daily maximum17.9 mg/L≤ 5 mg/L258%
July 2026Nitrogen, ammonia total [as N], daily average5.33 mg/L≤ 2 mg/L167%
July 2026Solids, total suspended, daily average25.8 mg/L≤ 5 mg/L416%
July 2026Solids, total suspended, single grab sample50.5 mg/L≤ 30 mg/L68%
August 2026BOD, carbonaceous [5 day, 20 C], daily maximum9.42 mg/L≤ 5 mg/L88%
August 2026Nitrogen, ammonia total [as N], daily average20.7 mg/L≤ 2 mg/L935%
August 2026Nitrogen, ammonia total [as N], daily average7.5 lb/d≤ 1.8 lb/d317%
August 2026Nitrogen, ammonia total [as N], single grab sample26.1 mg/L≤ 15 mg/L74%
August 2026Oxygen, dissolved [DO], monthly minimum4 mg/L≥ 5 mg/L20%
August 2026Solids, total suspended, daily average13 mg/L≤ 5 mg/L160%

Limits in force (19)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 5 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 5 mg/Lall year
Solids, total suspendedsingle grab sample≤ 30 mg/Lall year
Solids, total suspendeddaily average≤ 4.4 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily average≤ 1.8 lb/dall year
Phosphorus, total [as P]daily average≤ 1 mg/Lall year
Phosphorus, total [as P]single grab sample≤ 6 mg/Lall year
Phosphorus, total [as P]daily average≤ .88 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .105 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
E. colidaily average≤ 126 CFU/100mLall year
E. colisingle grab sample≤ 399 CFU/100mLall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]single grab sample≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 4.4 lb/dall year

How strict are these limits?

Cited limits by parameter: Texas's rules and the federal ones.

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