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Sag Harbor (V)

Sewage treatment plant, Sag Harbor, New York. NPDES permit NY0028908, in force until May 31, 2029. Last 12 months: over a limit 3 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (31 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
7 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 2025Nitrogen, ammonia total [as N], monthly average10.4 mg/L≤ 1.2 mg/L767%
March 2026Carbonaceous oxygen demand, % removal, monthly average minimum32 %≥ 85 %353%
May 2026Oxygen, dissolved [DO], daily minimum1.77 mg/L≥ 2 mg/L12%

Limits in force (34)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Oxygen, dissolved [DO]daily minimum≥ 2 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 63 lb/dall year
Solids, total suspended7-day average≤ 94 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
Nitrogen, total [as N]rolling averagereport only (mg/L)all year
Nitrogen, total [as N]rolling average≤ 17 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1.2 mg/LJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 3.7 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, nitrite total [as N]monthly averagereport only (mg/L)all year
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ .25 MGDall year
Chlorine, total residualdaily maximum≤ .03 mg/Lall year
Enterococci30-day geometric mean≤ 35 #/100mLall year
Enterococci30-day geometric meanreport only (#/100mL)all year
Enterococcidaily maximumreport only (#/100mL)all year
Enterococcidaily maximumreport only (#/100mL)all 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≤ 52 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 83 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly 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.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NY0028908 · MCP: https://passage-data.com/mcp