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Carmel (T)

Sewage treatment plant, Mahopac, New York. NPDES permit NY0030678, in force until Jan 31, 2027. Last 12 months: over a limit 12 times (last August 2026), 2 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly (19 values), form X monthly (9 values)
Renewal application due
Aug 4, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
8 values over a limit, 24 required values missing, 0 of 16 reports late

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

Period endingParameterReportedLimitOver by
October 2025Flow, in conduit or thru treatment plant, monthly average.0281 MGD≤ .0272 MGD3%
December 2025Solids, suspended percent removal, monthly average minimum82.7 %≥ 85 %15%
January 2026Flow, in conduit or thru treatment plant, monthly average.0381 MGD≤ .0272 MGD40%
February 2026Flow, in conduit or thru treatment plant, monthly average.034 MGD≤ .0272 MGD25%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average4.7 lb/d≤ 4.5 lb/d4%
March 2026Carbonaceous oxygen demand, % removal, monthly average minimum81.8 %≥ 85 %21%
March 2026Flow, in conduit or thru treatment plant, monthly average.0463 MGD≤ .0272 MGD70%
March 2026Solids, suspended percent removal, monthly average minimum73.3 %≥ 85 %78%
June 2026Carbonaceous oxygen demand, % removal, monthly average minimum73.1 %≥ 85 %79%
June 2026Solids, suspended percent removal, monthly average minimum43.9 %≥ 85 %274%
June 2026Solids, total suspended, monthly average37 mg/L≤ 30 mg/L23%
August 2026Flow, in conduit or thru treatment plant, monthly average.0285 MGD≤ .0272 MGD5%

Limits in force (32)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 2.27 lb/dall year
Solids, total suspendedmonthly average≤ 6.8 lb/dall year
Solids, total suspended7-day average≤ 10.2 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
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Nitrogen, ammonia, total [as NH3]monthly averagereport only (mg/L)Jun–Oct
Flow, in conduit or thru treatment plantmonthly average≤ .0272 MGDall year
Chlorine, total residualdaily maximum≤ .03 mg/LMay–Oct
Chlorine, total residualdaily maximum≤ .1 mg/LMay–Oct
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Oct
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4.5 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 6.8 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

New limits from Jan 31, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
BOD, 5-day, 20 deg. C, monthly average10 mg/Lnew——
BOD, 5-day, 20 deg. C, monthly average2.27 lb/dnew——
Nitrogen, ammonia total [as N], monthly average6.58 mg/L (Jun–Oct)new——

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/NY0030678 · MCP: https://passage-data.com/mcp