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Schenectady (C)

Sewage treatment plant, major discharger, Schenectady, New York. NPDES permit NY0020516 expired Dec 31, 2025; its limits still apply. Last 12 months: over a limit once (last July 2026), 4 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (24 values), form Q quarterly (11 values), form T quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 3 of 16 reports late

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

Period endingParameterReportedLimitOver by
July 2026Solids, settleable, daily maximum1 mL/L≤ .3 mL/L233%

Limits in force (39)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all 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≤ 4600 lb/dall year
Solids, total suspended7-day average≤ 6900 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, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Copper, total [as Cu]daily maximum≤ 30 ug/Lall year
Copper, total [as Cu]daily maximum≤ 4.7 lb/dall year
Zinc, total [as Zn]daily maximum≤ 67 ug/Lall year
Zinc, total [as Zn]daily maximum≤ 10 lb/dall year
Total phenolsmonthly average≤ 4 lb/dall year
Di[2-ethylhexyl] phthalate [DEHP]daily maximumreport only (ug/L) (alert, not enforceable)all year
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 2.1 lb/d (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmonthly average≤ 18.5 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ .13 mg/Lall year
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 4 tox acute (alert, not enforceable)all year
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 26 tox chronic (alert, not enforceable)all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 4 tox acute (alert, not enforceable)all year
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 26 tox chronic (alert, not enforceable)all year
Mercury, total [as Hg]12-month average≤ 20 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 50 ng/Lall year
Mercury, total [as Hg]12-month averagereport only (ng/L)all year
Mercury, total [as Hg]daily maximumreport only (ng/L)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≤ 3900 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 6200 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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NY0020516 · MCP: https://passage-data.com/mcp