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Yorktown (T)

Sewage treatment plant, major discharger, Yorktown Heights, New York. NPDES permit NY0026743 expired Oct 31, 2020; its limits still apply. Last 12 months: over a limit 6 times (last July 2026), 118 required values missing, 10 of 10 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form X monthly (41 values)
Last report on file
July 2026
Oct 2024 – Sep 2025
11 values over a limit, 0 required values missing, 6 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025Turbidity, instantaneous maximum8.2 NTU≤ 5 NTU—
May 2026Turbidity, instantaneous maximum14 NTU≤ 5 NTU—
May 2026Turbidity, time above limit, maximum4140 min≤ 2160 min92%
May 2026Turbidity, time above limit, maximum4140 min≤ 2160 min92%
July 2026Turbidity, time above limit, maximum5090 min≤ 2160 min136%
July 2026Turbidity, time above limit, maximum5090 min≤ 2160 min136%

Limits in force (43)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximum≤ 70 deg F (alert, not enforceable)all year
Turbidityinstantaneous maximum≤ 5 NTUall year
Oxygen demand, ultimatedaily maximum≤ 25 mg/LJun–Oct
Oxygen demand, ultimatedaily maximum≤ 325 lb/dJun–Oct
Oxygen, dissolved [DO]daily minimum≥ 7 mg/LJun–Oct
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspended7-day average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 130 lb/dall year
Solids, total suspended7-day average≤ 190 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, settleabledaily maximum≤ .1 mL/Lall year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jun–Oct
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)Jun–Oct
Phosphorus, total [as P]monthly average≤ .2 mg/Lall year
Phosphorus, total [as P]monthly average≤ 26 lb/dall year
Copper, total [as Cu]daily maximum≤ 19.2 ug/Lall year
Copper, total [as Cu]daily maximum≤ .25 lb/dall year
Lead, total [as Pb]daily maximum≤ 7.7 ug/Lall year
Lead, total [as Pb]daily maximum≤ .1 lb/dall year
Nickel, total [as Ni]daily maximum≤ 77 ug/Lall year
Nickel, total [as Ni]daily maximum≤ 1 lb/dall year
Zinc, total [as Zn]daily maximum≤ 177 ug/Lall year
Zinc, total [as Zn]daily maximum≤ 2.3 lb/dall year
Nitrogen, ammonia, total [as NH3]monthly average≤ 1.4 mg/LJun–Oct
Nitrogen, ammonia, total [as NH3]monthly average≤ 2.9 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia, total [as NH3]monthly average≤ 18.2 lb/dJun–Oct
Nitrogen, ammonia, total [as NH3]monthly average≤ 37.7 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
Flow, in conduit or thru treatment plant12-month average≤ 1.5 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 40 ug/Lall year
Chlorine, total residualminimum≥ .2 mg/Lall year
Turbidity, time above limitmaximum≤ 2160 minall year
Coliform, fecal general30-day geometric mean≤ 200 MPN/100mLall year
Coliform, fecal general7-day geometric mean≤ 400 MPN/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 130 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 190 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport 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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NY0026743 · MCP: https://passage-data.com/mcp