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Rensselaer County SD No.1

Sewage treatment plant, major discharger, Troy, New York. NPDES permit NY0087971, in force until May 31, 2030. Last 12 months: over a limit 5 times (last June 2026), 2 required values missing, 3 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (24 values), form Q quarterly (7 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 1 of 17 reports late

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

Period endingParameterReportedLimitOver by
March 2026Flow, in conduit or thru treatment plant, monthly average25.389 MGD≤ 24 MGD6%
May 2026Coliform, fecal general, 30-day geometric mean> 1.8 #/100mL≤ 200 #/100mL—
May 2026Coliform, fecal general, 7-day geometric mean> 6.51 #/100mL≤ 400 #/100mL—
June 2026Coliform, fecal general, 30-day geometric mean> 1.5 #/100mL≤ 200 #/100mL—
June 2026Coliform, fecal general, 7-day geometric mean> 4.83 #/100mL≤ 400 #/100mL—

Limits in force (31)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 6000 lb/dall year
Solids, total suspended7-day average≤ 9000 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 average≤ 16 mg/LJun–Oct
Lead, total [as Pb]daily maximumreport only (mg/L)all year
Lead, total [as Pb]daily maximum≤ 2.5 lb/dall year
Zinc, total [as Zn]daily maximumreport only (mg/L) (alert, not enforceable)all year
Zinc, total [as Zn]daily maximum≤ 23 lb/d (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmonthly average≤ 24 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ .6 mg/LMay–Oct
Mercury, total [as Hg]rolling average≤ 12 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 50 ng/Lall year
Mercury, total [as Hg]daily maximumreport only (ng/L)all year
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Oct
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Oct
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≤ 5000 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 8000 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/NY0087971 · MCP: https://passage-data.com/mcp