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Sewage treatment plant, major discharger, Groves, Texas. NPDES permit TX0022926, in force until Jul 28, 2029. Last 12 months: over a limit 58 times (last August 2026), 2 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | BOD, 5-day, 20 deg. C, daily average | 47.42 mg/L | ≤ 20 mg/L | 137% |
| October 2025 | BOD, 5-day, 20 deg. C, daily maximum | 63.3 mg/L | ≤ 45 mg/L | 41% |
| October 2025 | Solids, total suspended, daily average | 36.18 mg/L | ≤ 20 mg/L | 81% |
| October 2025 | Solids, total suspended, daily maximum | 55 mg/L | ≤ 45 mg/L | 22% |
| November 2025 | BOD, 5-day, 20 deg. C, daily average | 43.67 mg/L | ≤ 20 mg/L | 118% |
| November 2025 | BOD, 5-day, 20 deg. C, daily maximum | 60.4 mg/L | ≤ 45 mg/L | 34% |
| November 2025 | Enterococci, daily average | 968.6 CFU/100mL | ≤ 35 CFU/100mL | 2667% |
| November 2025 | Enterococci, daily maximum | 2420 CFU/100mL | ≤ 104 CFU/100mL | 2227% |
| November 2025 | Solids, total suspended, daily average | 45.55 mg/L | ≤ 20 mg/L | 128% |
| November 2025 | Solids, total suspended, daily maximum | 63.5 mg/L | ≤ 45 mg/L | 41% |
| December 2025 | BOD, 5-day, 20 deg. C, daily average | 44.9 mg/L | ≤ 20 mg/L | 125% |
| December 2025 | BOD, 5-day, 20 deg. C, daily maximum | 66.5 mg/L | ≤ 45 mg/L | 48% |
| December 2025 | Enterococci, daily average | 404.5 CFU/100mL | ≤ 35 CFU/100mL | 1056% |
| December 2025 | Enterococci, daily maximum | 2420 CFU/100mL | ≤ 104 CFU/100mL | 2227% |
| December 2025 | Solids, total suspended, daily average | 45.56 mg/L | ≤ 20 mg/L | 128% |
| December 2025 | Solids, total suspended, daily maximum | 67 mg/L | ≤ 45 mg/L | 49% |
| January 2026 | BOD, 5-day, 20 deg. C, daily average | 42.79 mg/L | ≤ 20 mg/L | 114% |
| January 2026 | BOD, 5-day, 20 deg. C, daily maximum | 69.2 mg/L | ≤ 45 mg/L | 54% |
| January 2026 | Solids, total suspended, daily average | 42.77 mg/L | ≤ 20 mg/L | 114% |
| January 2026 | Solids, total suspended, daily maximum | 74.5 mg/L | ≤ 45 mg/L | 66% |
| February 2026 | BOD, 5-day, 20 deg. C, daily average | 43.13 mg/L | ≤ 20 mg/L | 116% |
| February 2026 | BOD, 5-day, 20 deg. C, daily maximum | 67.1 mg/L | ≤ 45 mg/L | 49% |
| February 2026 | Enterococci, daily average | 484.8 CFU/100mL | ≤ 35 CFU/100mL | 1285% |
| February 2026 | Enterococci, daily maximum | 2420 CFU/100mL | ≤ 104 CFU/100mL | 2227% |
| February 2026 | Solids, total suspended, daily average | 44.41 mg/L | ≤ 20 mg/L | 122% |
| February 2026 | Solids, total suspended, daily maximum | 65 mg/L | ≤ 45 mg/L | 44% |
| March 2026 | BOD, 5-day, 20 deg. C, daily average | 42.09 mg/L | ≤ 20 mg/L | 110% |
| March 2026 | BOD, 5-day, 20 deg. C, daily maximum | 46.94 mg/L | ≤ 45 mg/L | 4% |
| March 2026 | Solids, total suspended, daily average | 47.11 mg/L | ≤ 20 mg/L | 136% |
| March 2026 | Solids, total suspended, daily maximum | 63.5 mg/L | ≤ 45 mg/L | 41% |
| April 2026 | BOD, 5-day, 20 deg. C, daily average | 40.27 mg/L | ≤ 20 mg/L | 101% |
| April 2026 | BOD, 5-day, 20 deg. C, daily maximum | 45.76 mg/L | ≤ 45 mg/L | 2% |
| April 2026 | Enterococci, daily average | 405.2 CFU/100mL | ≤ 35 CFU/100mL | 1058% |
| April 2026 | Enterococci, daily maximum | 2420 CFU/100mL | ≤ 104 CFU/100mL | 2227% |
| April 2026 | Solids, total suspended, daily average | 43.05 mg/L | ≤ 20 mg/L | 115% |
| April 2026 | Solids, total suspended, daily maximum | 59 mg/L | ≤ 45 mg/L | 31% |
| May 2026 | BOD, 5-day, 20 deg. C, daily average | 38.57 mg/L | ≤ 20 mg/L | 93% |
| May 2026 | BOD, 5-day, 20 deg. C, daily maximum | 47.09 mg/L | ≤ 45 mg/L | 5% |
| May 2026 | Flow, in conduit or thru treatment plant, 2-hour peak | 8337 gal/min | ≤ 6250 gal/min | 33% |
| May 2026 | Solids, total suspended, daily average | 31.19 mg/L | ≤ 20 mg/L | 56% |
| May 2026 | Solids, total suspended, daily maximum | 58.5 mg/L | ≤ 45 mg/L | 30% |
| June 2026 | BOD, 5-day, 20 deg. C, daily average | 40.31 mg/L | ≤ 20 mg/L | 102% |
| June 2026 | BOD, 5-day, 20 deg. C, daily maximum | 47.06 mg/L | ≤ 45 mg/L | 5% |
| June 2026 | Enterococci, daily average | 968.6 CFU/100mL | ≤ 35 CFU/100mL | 2667% |
| June 2026 | Enterococci, daily maximum | 2420 CFU/100mL | ≤ 104 CFU/100mL | 2227% |
| June 2026 | Flow, in conduit or thru treatment plant, 2-hour peak | 8337 gal/min | ≤ 6250 gal/min | 33% |
| June 2026 | Solids, total suspended, daily average | 24.83 mg/L | ≤ 20 mg/L | 24% |
| June 2026 | Solids, total suspended, daily maximum | 50 mg/L | ≤ 45 mg/L | 11% |
| July 2026 | BOD, 5-day, 20 deg. C, daily average | 39.94 mg/L | ≤ 20 mg/L | 100% |
| July 2026 | BOD, 5-day, 20 deg. C, daily average | 856.51 lb/d | ≤ 831 lb/d | 3% |
| July 2026 | Enterococci, daily maximum | 148 CFU/100mL | ≤ 104 CFU/100mL | 42% |
| July 2026 | Flow, in conduit or thru treatment plant, 2-hour peak | 8346 gal/min | ≤ 6250 gal/min | 34% |
| July 2026 | Solids, total suspended, daily average | 30.15 mg/L | ≤ 20 mg/L | 51% |
| July 2026 | Solids, total suspended, daily maximum | 59.5 mg/L | ≤ 45 mg/L | 32% |
| August 2026 | BOD, 5-day, 20 deg. C, daily average | 40.58 mg/L | ≤ 20 mg/L | 103% |
| August 2026 | BOD, 5-day, 20 deg. C, daily maximum | 45.71 mg/L | ≤ 45 mg/L | 2% |
| August 2026 | Solids, total suspended, daily average | 49.77 mg/L | ≤ 20 mg/L | 149% |
| August 2026 | Solids, total suspended, daily maximum | 65 mg/L | ≤ 45 mg/L | 44% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | monthly minimum | ≥ 5 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily average | ≤ 20 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily average | ≤ 831 lb/d | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | daily average | ≤ 831 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | report only (lb/d) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | 2-hour peak | ≤ 6250 gal/min | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 4.98 MGD | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .1 mg/L | all year | 001 |
| Chlorine, total residual | monthly minimum | ≥ 1 mg/L | all year | 001 |
| Enterococci | daily average | ≤ 35 CFU/100mL | all year | 001 |
| Enterococci | daily maximum | ≤ 104 CFU/100mL | all year | 001 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| Whole effluent toxicity - retest #1 | single sample | report only (pass=0;fail=1) | all year | TXA |
| Whole effluent toxicity - retest #2 | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Menidia beryllina | single grab sample | report only (pass=0;fail=1) | all year | TXA |
Cited limits by parameter: Texas's rules and the federal ones.
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