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Sewage treatment plant, major discharger, Hornell, New York. NPDES permit NY0023647 expired Oct 31, 2026. Last 12 months: over a limit 4 times (last May 2026), 1 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Nitrogen, ammonia total [as N], monthly average | 178 lb/d | ≤ 140 lb/d | 27% |
| March 2026 | Nitrogen, ammonia total [as N], monthly average | 6 mg/L | ≤ 4.2 mg/L | 43% |
| April 2026 | Flow, in conduit or thru treatment plant, monthly average | 5.3 MGD | ≤ 4 MGD | 33% |
| May 2026 | Flow, in conduit or thru treatment plant, monthly average | 4.4 MGD | ≤ 4 MGD | 10% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| Oxygen, dissolved [DO] | daily minimum | ≥ 7 mg/L | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 1000 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 1500 lb/d | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | 7-day average | report only (mg/L) | all year |
| Solids, total suspended | monthly average | report only (lb/d) | all year |
| Solids, total suspended | monthly average | report only (lb/d) | all year |
| Solids, total suspended | 7-day average | report only (lb/d) | all year |
| Solids, settleable | daily maximum | ≤ .1 mL/L | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, total [as N] | 12-month total | ≤ 117000 lb/yr | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | Jun–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.2 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 50 lb/d | Jun–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 140 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, nitrite total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, nitrite total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, nitrate total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, nitrate total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year |
| Phosphorus, total [as P] | monthly average | ≤ .5 mg/L | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year |
| Phosphorus, total [as P] | 12-month total | ≤ 6088 lb/yr | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 4 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 4 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | daily maximum | ≤ .03 mg/L | May–Oct |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ .3 tox acute (alert, not enforceable) | all year |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 3.3 tox chronic (alert, not enforceable) | all year |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ .3 tox acute (alert, not enforceable) | all year |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 3.3 tox chronic (alert, not enforceable) | all year |
| Mercury, total [as Hg] | 12-month average | ≤ 12 ng/L | all year |
| Mercury, total [as Hg] | 12-month average | ≤ 12 ng/L | all year |
| Mercury, total [as Hg] | daily maximum | ≤ 50 ng/L | all year |
| Mercury, total [as Hg] | daily maximum | ≤ 50 ng/L | all year |
| Coliform, fecal general | 30-day geometric mean | ≤ 200 #/100mL | May–Oct |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 11 mg/L | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, May, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 370 lb/d | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 1000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
| Carbonaceous oxygen demand, % removal | monthly average minimum | ≥ 85 % | all year |
Cited limits by parameter: New York's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/NY0023647 · MCP: https://passage-data.com/mcp