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Williamsburg Ridge Sewage Works Corp

Services, Mahopac, New York. NPDES permit NY0165611 expired Oct 31, 2017; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (26 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (27)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Turbidityinstantaneous maximum≤ 5 NTUall year
Oxygen, dissolved [DO]daily minimum≥ 7 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
pHminimumreport only (SU)all year
pHmaximumreport only (SU)all year
Solids, total suspendeddaily maximum≤ 10 mg/Lall year
Solids, total suspendeddaily maximum≤ 1.83 lb/dall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, settleabledaily maximum≤ .1 mL/Lall year
Solids, settleabledaily maximumreport only (mL/L)all year
Phosphorus, total [as P]daily maximum≤ .5 mg/Lall year
Nitrogen, ammonia, total [as NH3]daily maximum≤ 2 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia, total [as NH3]daily maximum≤ 1.5 mg/LJun–Oct
Flow, in conduit or thru treatment plant30-day arithmetic mean≤ .022 MGDall year
Chlorine, total residualdaily maximum≤ .02 mg/Lall year
Chlorine, total residualminimum≥ .2 mg/Lall year
Turbidity, time above limitmaximum≤ 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]daily maximum≤ 5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ .92 lb/dall year
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)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.

Same industry: the 180 Miscellaneous Services permits in New York.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NY0165611 · MCP: https://passage-data.com/mcp