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Niagara County SD No.1

Sewage treatment plant, major discharger, Niagara Falls, New York. NPDES permit NY0027979 expired Mar 31, 2020; its limits still apply. Last 12 months: over a limit 5 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (30 values), form Q quarterly (6 values), form U quarterly (16 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 21 reports late

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

Period endingParameterReportedLimitOver by
March 2026Flow, in conduit or thru treatment plant, monthly average14.1 MGD≤ 14.08 MGD0%
May 2026Solids, settleable, daily maximum.2 mL/L≤ .1 mL/L100%
July 2026Coliform, fecal general, 7-day geometric mean870.92 #/100mL≤ 400 #/100mL118%
August 2026Phenols, daily maximum.28 mg/L≤ .1 mg/L180%
August 2026Solids, settleable, daily maximum.3 mL/L≤ .1 mL/L200%

Limits in force (52)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
pHminimumreport only (SU)all year
pHmaximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 3522 lb/dall year
Solids, total suspended7-day average≤ 5284 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, settleabledaily maximum≤ .1 mL/Lall year
Solids, settleabledaily maximumreport only (mL/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Arsenic, total recoverabledaily maximum≤ .62 lb/d (alert, not enforceable)all year
Selenium, total recoverabledaily maximum≤ 1.5 lb/d (alert, not enforceable)all year
Nickel, total recoverabledaily maximum≤ 5 lb/d (alert, not enforceable)all year
Silver total recoverabledaily maximum≤ 1.1 lb/d (alert, not enforceable)all year
Zinc, total recoverabledaily maximum≤ 10 lb/d (alert, not enforceable)all year
Lead, total recoverabledaily maximum≤ .89 lb/d (alert, not enforceable)all year
Chromium, total recoverabledaily maximum≤ .87 lb/d (alert, not enforceable)all year
Antimony, total recoverabledaily maximum≤ 2.5 lb/d (alert, not enforceable)all year
Carbon tetrachloridedaily maximum≤ 1.2 lb/d (alert, not enforceable)all year
Chloroformdaily maximum≤ .92 lb/d (alert, not enforceable)all year
Methylene chloridedaily maximum≤ 1.2 lb/d (alert, not enforceable)all year
1,1-Dichloroethylenedaily maximum≤ .4 lb/d (alert, not enforceable)all year
1,1,1-Trichloroethanedaily maximum≤ 1.2 lb/d (alert, not enforceable)all year
Nitrogen, ammonia, total [as NH3]daily maximumreport only (mg/L)all year
1,2-Dichloroethenedaily maximum≤ 2.4 lb/d (alert, not enforceable)all year
Vinyl chloridedaily maximum≤ .5 lb/d (alert, not enforceable)all year
Trichloroethylenedaily maximum≤ .88 lb/d (alert, not enforceable)all year
Phenolsdaily maximum≤ .1 mg/Lall year
Phenolsdaily maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 14.08 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 2 mg/Lall year
Enterococcidaily maximumreport only (#/100mL)all year
Nitrogen, nitrate total [as NO3]daily maximumreport only (mg/L)all year
Nitrogen, nitrite total [as NO2]daily maximumreport only (mg/L)all year
Mercury, total [as Hg]daily maximum≤ 50 ng/Lall 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≤ 2936 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 4697 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/NY0027979 · MCP: https://passage-data.com/mcp