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Dansville (V)

Sewage treatment plant, major discharger, Dansville, New York. NPDES permit NY0024384 expired Jun 30, 2021; its limits still apply. Last 12 months: over a limit 3 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (29 values), form Q quarterly (1 value), form V monthly (2 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 28 reports late

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

Period endingParameterReportedLimitOver by
March 2026Flow, in conduit or thru treatment plant, monthly average1.776 MGD≤ 1.75 MGD1%
April 2026Flow, in conduit or thru treatment plant, monthly average2.47 MGD≤ 1.75 MGD41%
May 2026Flow, in conduit or thru treatment plant, monthly average2.105 MGD≤ 1.75 MGD20%

Limits in force (40)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximum≤ 70 deg F (alert, not enforceable)all year
Temperature, water deg. fahrenheitdaily maximumreport only (deg F) (alert, not enforceable)all year
Oxygen demand, ultimatemonthly averagereport only (mg/L)all year
Oxygen demand, ultimatemonthly averagereport only (lb/d)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 suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 375 lb/dall year
Solids, total suspendeddaily maximum≤ 375 lb/dall year
Solids, total suspended7-day average≤ 563 lb/dall year
Solids, total suspended7-day average≤ 563 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all 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
Nitrogen, Kjeldahl, 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
Nitrogen, ammonia, total [as NH3]monthly averagereport only (mg/L)all year
Nitrogen, ammonia, total [as NH3]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 1.75 MGDall year
Flow, in conduit or thru treatment plantmonthly average≤ 1.75 MGDall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Mercury, total [as Hg]daily maximum≤ 50 ng/Lall year
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Oct
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Oct
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Oct
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 22.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 219 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 329 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.

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/NY0024384 · MCP: https://passage-data.com/mcp