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Stamford (V)

Sewage treatment plant, Stamford, New York. NPDES permit NY0021555, in force until Jun 30, 2029. Last 12 months: over a limit 2 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (41 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
March 2026Carbonaceous oxygen demand, % removal, monthly average minimum84 %≥ 85 %7%
March 2026Flow, in conduit or thru treatment plant, monthly average.782 MGD≤ .7 MGD12%

Limits in force (43)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Turbidityinstantaneous maximum≤ 5 NTUall year
Oxygen demand, ultimatemonthly average≤ 279 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
Oxygen demand, ultimatemonthly average≤ 183 lb/dJun–Oct
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. C7-day average≤ 2500 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 8.5 SUall year
pHminimumreport only (SU)all year
pHmaximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspended7-day average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 58 lb/dall year
Solids, total suspended7-day average≤ 88 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspended7-day averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspended7-day averagereport only (lb/d)all year
Solids, settleabledaily maximum≤ .1 mL/Lall year
Solids, settleabledaily maximumreport only (mL/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ .13 mg/Lall year
Phosphorus, total [as P]monthly average≤ .8 lb/dall year
Nitrogen, ammonia, total [as NH3]monthly average≤ 4.1 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia, total [as NH3]monthly average≤ 1.4 mg/LJun–Oct
Nitrogen, ammonia, total [as NH3]monthly average≤ 292 lb/dall year
Flow, in conduit or thru treatment plantmonthly average≤ .7 MGDall year
Chlorine, total residualdaily maximum≤ .1 mg/Lall year
Chlorine, total residualminimum≥ .2 mg/Lall year
Turbidity, time above limitdaily maximum≤ 2160 minall year
Coliform, fecal general30-day geometric mean≤ 200 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 146 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 235 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]7-day averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]7-day averagereport only (lb/d)all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Carbonaceous oxygen demand, % removalmonthly average minimum≥ 85 %all year

How strict are these limits?

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/NY0021555 · MCP: https://passage-data.com/mcp