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Greenwich (V)

Sewage treatment plant, Greenwich, New York. NPDES permit NY0131555, in force until Apr 30, 2030. Last 12 months: over a limit 10 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (28 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
12 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
October 2025Coliform, fecal general, 30-day geometric mean2420 #/100mL≤ 200 #/100mL1110%
October 2025Coliform, fecal general, 7-day geometric mean2420 #/100mL≤ 400 #/100mL505%
May 2026Coliform, fecal general, 30-day geometric mean2420 #/100mL≤ 200 #/100mL1110%
May 2026Coliform, fecal general, 7-day geometric mean2420 #/100mL≤ 400 #/100mL505%
June 2026Coliform, fecal general, 30-day geometric mean2419.6 #/100mL≤ 200 #/100mL1110%
June 2026Coliform, fecal general, 7-day geometric mean2419.6 #/100mL≤ 400 #/100mL505%
July 2026Coliform, fecal general, 30-day geometric mean24196 #/100mL≤ 200 #/100mL11998%
July 2026Coliform, fecal general, 7-day geometric mean24196 #/100mL≤ 400 #/100mL5949%
August 2026Coliform, fecal general, 30-day geometric mean2419.6 #/100mL≤ 200 #/100mL1110%
August 2026Coliform, fecal general, 7-day geometric mean2419.6 #/100mL≤ 400 #/100mL505%

Limits in force (28)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 13 lb/dall year
BOD, 5-day, 20 deg. C7-day average≤ 19 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
pHminimumreport only (SU)all year
pHmaximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 13 lb/dall year
Solids, total suspended7-day average≤ 19 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, settleabledaily maximum≤ .3 mL/Lall year
Solids, settleabledaily maximumreport only (mL/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly average≤ .05 MGDall year
Chlorine, total residualdaily maximum≤ 2 mg/LMay–Oct
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Oct
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Oct
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

New limits from May 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, daily maximum0.37 mg/L (May–Oct)tighter0 mg/L (5 values)0×

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/NY0131555 · MCP: https://passage-data.com/mcp