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Sylvan Beach (V)

Sewage treatment plant, major discharger, Sylvan Beach, New York. NPDES permit NY0036790 expired Mar 31, 2025; its limits still apply. Last 12 months: over a limit 9 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form T quarterly (4 values), form X monthly (28 values), form Y monthly (3 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
11 values over a limit, 0 required values missing, 0 of 18 reports late

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

Period endingParameterReportedLimitOver by
December 2025Solids, suspended percent removal, monthly average minimum76 %≥ 85 %60%
March 2026BOD, 5-day, percent removal, monthly average minimum75 %≥ 85 %67%
March 2026Solids, suspended percent removal, monthly average minimum63 %≥ 85 %147%
April 2026BOD, 5-day, percent removal, monthly average minimum78 %≥ 85 %47%
April 2026Solids, settleable, daily maximum.5 mL/L≤ .1 mL/L400%
April 2026Solids, suspended percent removal, monthly average minimum67 %≥ 85 %120%
April 2026Solids, total suspended, 7-day average859 lb/d≤ 750 lb/d15%
May 2026Coliform, fecal general, 7-day geometric mean2420 MPN/100mL≤ 400 MPN/100mL505%
May 2026Solids, suspended percent removal, monthly average minimum84 %≥ 85 %7%

Limits in force (35)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. C30-day average≤ 500 lb/dall year
BOD, 5-day, 20 deg. C7-day average≤ 750 lb/dall year
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
pHminimumreport only (SU)all year
pHmaximumreport only (SU)all year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 500 lb/dall year
Solids, total suspended7-day average≤ 750 lb/dall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, settleabledaily maximum≤ .1 mL/Lall year
Solids, settleabledaily maximumreport only (mL/L)all year
Nitrogen, Kjeldahl, total [as N]monthly maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Nitrogen, ammonia, total [as NH3]daily maximumreport only (mg/L)all year
Nitrogen, ammonia, total [as NH3]daily maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 2 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ .5 mg/LMay–Oct
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 3.4 tox acute (alert, not enforceable)all year
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 21 tox chronic (alert, not enforceable)all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 3.4 tox acute (alert, not enforceable)all year
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 21 tox chronic (alert, not enforceable)all year
Mercury, dissolved [as Hg]daily maximum≤ 50 ng/Lall year
Coliform, fecal general30-day geometric mean≤ 200 MPN/100mLMay–Oct
Coliform, fecal general7-day geometric mean≤ 400 MPN/100mLMay–Oct
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent 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/NY0036790 · MCP: https://passage-data.com/mcp