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Sewage treatment plant, major discharger, Stony Brook, New York. NPDES permit NY0206644, in force until Nov 30, 2028. Last 12 months: over a limit once (last May 2026), 1 required value missing, 3 of 36 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| May 2026 | Coliform, total general, monthly median | 3095 #/100mL | ≤ 700 #/100mL | 342% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 700 lb/d | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 1050 lb/d | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 002 |
| Solids, settleable | daily maximum | ≤ .3 mL/L | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 002 |
| Nitrogen, total [as N] | individual rolling average | report only (lb/d) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphate, ortho, dissolved [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphate, ortho, dissolved [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Cyanide, total [as CN] | daily maximum | ≤ .0077 mg/L (alert, not enforceable) | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ .027 mg/L (alert, not enforceable) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | ≤ .23 mg/L (alert, not enforceable) | all year | 002 |
| Total agg concentration #1 | monthly average | report only (lb/d) | all year | 002 |
| Total agg concentration #1 | rolling average | ≤ 213 lb/d | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 2.8 MGD | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .198 mg/L | all year | 002 |
| Enterococci | 30-day geometric mean | ≤ 35 #/100mL | all year | 002 |
| Enterococci | 30-day geometric mean | report only (#/100mL) | all year | 002 |
| Enterococci | daily maximum | report only (#/100mL) | all year | 002 |
| Enterococci | daily maximum | report only (#/100mL) | all year | 002 |
| Mercury, total [as Hg] | daily maximum | ≤ 50 ng/L | all year | 002 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 002 |
| Coliform, fecal general | 30-day geometric mean | ≤ 200 #/100mL | all year | 002 |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | all year | 002 |
| Coliform, total general | monthly median | ≤ 700 #/100mL | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 580 lb/d | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 930 lb/d | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | all year | 002 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Carbonaceous oxygen demand, % removal | monthly average minimum | ≥ 85 % | all year | 002 |
| 48Hr Acute Mysidopsis Bahia | maximum | ≤ 5.85 tox acute (alert, not enforceable) | all year | 002 |
| TU 48Hr Acute Cyprinodon variegatus | maximum | ≤ 5.85 tox acute (alert, not enforceable) | all year | 002 |
| TU Static Renewal Chronic Cyprinodeon variegatus | maximum | ≤ 26.4 tox chronic (alert, not enforceable) | all year | 002 |
| TU Static Renewal 7-Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | maximum | ≤ 26.4 tox chronic (alert, not enforceable) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 003 |
| pH | daily maximum | ≤ 8.5 SU | all year | 003 |
| Nitrogen, total [as N] | monthly average | ≤ 10 mg/L | all year | 003 |
| Cyanide, total [as CN] | daily maximum | ≤ .4 mg/L | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ .4 mg/L | all year | 003 |
| Zinc, total [as Zn] | daily maximum | ≤ 5 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ .3 MGD | all year | 003 |
| Mercury, total [as Hg] | daily maximum | ≤ 1.4 ug/L | all year | 003 |
Cited limits by parameter: New York's rules and the federal ones.
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